./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:46:30,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:46:30,274 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:46:30,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:46:30,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:46:30,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:46:30,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:46:30,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:46:30,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:46:30,292 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:46:30,293 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:46:30,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:46:30,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:46:30,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:46:30,294 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:46:30,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:46:30,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:46:30,295 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:46:30,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:46:30,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:46:30,296 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:46:30,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:46:30,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:46:30,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:46:30,297 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:46:30,297 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:46:30,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:46:30,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:46:30,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:46:30,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:46:30,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:46:30,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:46:30,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:46:30,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:46:30,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:46:30,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:46:30,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:46:30,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:46:30,300 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:46:30,300 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:46:30,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:46:30,302 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:46:30,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:46:30,303 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:46:30,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:46:30,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:46:30,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:46:30,467 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:46:30,468 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:46:30,468 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml [2024-06-21 16:46:30,644 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:46:30,645 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:46:30,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-21 16:46:31,766 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:46:31,950 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:46:31,951 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-21 16:46:31,966 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1a97c95/2eb6309062d54a13b535ae7aadc24fb8/FLAG35366a08b [2024-06-21 16:46:31,978 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1a97c95/2eb6309062d54a13b535ae7aadc24fb8 [2024-06-21 16:46:31,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:46:31,979 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:46:31,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:46:31,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:46:31,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:46:31,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:46:30" (1/2) ... [2024-06-21 16:46:31,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a58b8cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:46:31, skipping insertion in model container [2024-06-21 16:46:31,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:46:30" (1/2) ... [2024-06-21 16:46:31,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ac33795 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:46:31, skipping insertion in model container [2024-06-21 16:46:31,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:46:31" (2/2) ... [2024-06-21 16:46:31,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a58b8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:31, skipping insertion in model container [2024-06-21 16:46:31,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:46:31" (2/2) ... [2024-06-21 16:46:31,991 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:46:32,059 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:46:32,060 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 16:46:32,060 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 16:46:32,060 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 16:46:32,060 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:46:32,060 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-21 16:46:32,095 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:46:32,412 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:46:32,419 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:46:32,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:46:32,524 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:46:32,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32 WrapperNode [2024-06-21 16:46:32,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:46:32,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:46:32,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:46:32,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:46:32,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,571 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-21 16:46:32,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:46:32,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:46:32,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:46:32,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:46:32,585 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,588 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,600 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:46:32,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,621 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,624 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,625 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,627 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:46:32,628 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:46:32,628 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:46:32,628 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:46:32,628 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (1/1) ... [2024-06-21 16:46:32,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:46:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:46:32,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:46:32,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:46:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:46:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:46:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:46:32,703 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:46:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:46:32,704 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:46:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:46:32,704 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:46:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:46:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:46:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:46:32,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:46:32,706 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:46:32,839 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:46:32,841 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:46:33,134 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:46:33,134 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:46:33,290 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:46:33,290 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:46:33,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:46:33 BoogieIcfgContainer [2024-06-21 16:46:33,291 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:46:33,294 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:46:33,294 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:46:33,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:46:33,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:46:30" (1/4) ... [2024-06-21 16:46:33,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572383d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:46:33, skipping insertion in model container [2024-06-21 16:46:33,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:46:31" (2/4) ... [2024-06-21 16:46:33,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572383d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:46:33, skipping insertion in model container [2024-06-21 16:46:33,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:46:32" (3/4) ... [2024-06-21 16:46:33,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572383d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:46:33, skipping insertion in model container [2024-06-21 16:46:33,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:46:33" (4/4) ... [2024-06-21 16:46:33,300 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_pso.opt_tso.opt.i [2024-06-21 16:46:33,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:46:33,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:46:33,314 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:46:33,349 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:46:33,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:46:33,401 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 16:46:33,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:46:33,403 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 65 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. [2024-06-21 16:46:33,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:46:33,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 16:46:33,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:46:33,416 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;@4dc4ad77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:46:33,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:46:33,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:46:33,419 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:46:33,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:46:33,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:33,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:46:33,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:33,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash 363378819, now seen corresponding path program 1 times [2024-06-21 16:46:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:33,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708240786] [2024-06-21 16:46:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:33,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708240786] [2024-06-21 16:46:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708240786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:34,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:46:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113516609] [2024-06-21 16:46:34,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:46:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:46:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:46:34,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-21 16:46:34,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:34,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:34,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-21 16:46:34,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:34,435 INFO L124 PetriNetUnfolderBase]: 869/1427 cut-off events. [2024-06-21 16:46:34,435 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 16:46:34,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 1427 events. 869/1427 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7301 event pairs, 566 based on Foata normal form. 1/1369 useless extension candidates. Maximal degree in co-relation 2793. Up to 1315 conditions per place. [2024-06-21 16:46:34,447 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 16:46:34,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-21 16:46:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:46:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:46:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 16:46:34,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-21 16:46:34,458 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-21 16:46:34,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-21 16:46:34,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:34,463 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 16:46:34,464 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} [2024-06-21 16:46:34,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 16:46:34,467 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 16:46:34,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:34,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:34,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:46:34,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:34,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1314823706, now seen corresponding path program 1 times [2024-06-21 16:46:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:34,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456870734] [2024-06-21 16:46:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:34,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:35,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456870734] [2024-06-21 16:46:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456870734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:35,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:35,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:46:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048824613] [2024-06-21 16:46:35,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:46:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:35,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:46:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:46:35,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 16:46:35,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:35,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 16:46:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:35,346 INFO L124 PetriNetUnfolderBase]: 996/1581 cut-off events. [2024-06-21 16:46:35,347 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-06-21 16:46:35,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1581 events. 996/1581 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8009 event pairs, 519 based on Foata normal form. 3/1556 useless extension candidates. Maximal degree in co-relation 3584. Up to 1484 conditions per place. [2024-06-21 16:46:35,354 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 16:46:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-21 16:46:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:46:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:46:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 16:46:35,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:46:35,356 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 104 transitions. [2024-06-21 16:46:35,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-21 16:46:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:46:35,358 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 16:46:35,358 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} [2024-06-21 16:46:35,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 16:46:35,359 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 16:46:35,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:35,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:35,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:35,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:46:35,360 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)] === [2024-06-21 16:46:35,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash -188208607, now seen corresponding path program 1 times [2024-06-21 16:46:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:35,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005558595] [2024-06-21 16:46:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005558595] [2024-06-21 16:46:36,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005558595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:36,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:46:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631512033] [2024-06-21 16:46:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:46:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:46:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:46:36,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 16:46:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:36,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:36,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 16:46:36,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:36,546 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-21 16:46:36,547 INFO L125 PetriNetUnfolderBase]: For 1076/1076 co-relation queries the response was YES. [2024-06-21 16:46:36,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4970 conditions, 1973 events. 1265/1973 cut-off events. For 1076/1076 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9692 event pairs, 445 based on Foata normal form. 6/1942 useless extension candidates. Maximal degree in co-relation 4956. Up to 1828 conditions per place. [2024-06-21 16:46:36,556 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 16:46:36,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 350 flow [2024-06-21 16:46:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:46:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:46:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 16:46:36,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-21 16:46:36,559 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 143 transitions. [2024-06-21 16:46:36,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 350 flow [2024-06-21 16:46:36,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 16:46:36,562 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 16:46:36,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 16:46:36,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 16:46:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 16:46:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:36,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:36,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:36,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:46:36,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:36,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash 632564042, now seen corresponding path program 1 times [2024-06-21 16:46:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294574123] [2024-06-21 16:46:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:37,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:37,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294574123] [2024-06-21 16:46:37,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294574123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:37,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:46:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27370357] [2024-06-21 16:46:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:46:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:46:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:46:37,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:46:37,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:37,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:37,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:46:37,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:37,501 INFO L124 PetriNetUnfolderBase]: 1085/1810 cut-off events. [2024-06-21 16:46:37,501 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-21 16:46:37,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4867 conditions, 1810 events. 1085/1810 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9352 event pairs, 442 based on Foata normal form. 4/1805 useless extension candidates. Maximal degree in co-relation 4850. Up to 1611 conditions per place. [2024-06-21 16:46:37,510 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-21 16:46:37,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 327 flow [2024-06-21 16:46:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:46:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:46:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 16:46:37,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:46:37,512 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 105 transitions. [2024-06-21 16:46:37,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 327 flow [2024-06-21 16:46:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:37,514 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 16:46:37,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 16:46:37,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 16:46:37,515 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 16:46:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:37,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:37,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:46:37,516 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:37,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1669713967, now seen corresponding path program 1 times [2024-06-21 16:46:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822217956] [2024-06-21 16:46:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:38,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:38,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822217956] [2024-06-21 16:46:38,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822217956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:38,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:38,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:46:38,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574468979] [2024-06-21 16:46:38,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:38,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:46:38,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:46:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:46:38,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:38,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 16:46:38,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:38,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:38,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:38,684 INFO L124 PetriNetUnfolderBase]: 1277/2017 cut-off events. [2024-06-21 16:46:38,684 INFO L125 PetriNetUnfolderBase]: For 3038/3038 co-relation queries the response was YES. [2024-06-21 16:46:38,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5997 conditions, 2017 events. 1277/2017 cut-off events. For 3038/3038 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9971 event pairs, 487 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 5978. Up to 1826 conditions per place. [2024-06-21 16:46:38,694 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 16:46:38,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 444 flow [2024-06-21 16:46:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:46:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:46:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 16:46:38,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 16:46:38,696 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 128 transitions. [2024-06-21 16:46:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 444 flow [2024-06-21 16:46:38,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 424 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:38,699 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-21 16:46:38,699 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-21 16:46:38,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 16:46:38,699 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-21 16:46:38,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 16:46:38,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:38,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:38,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:46:38,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:38,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1699414447, now seen corresponding path program 2 times [2024-06-21 16:46:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614144440] [2024-06-21 16:46:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:39,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614144440] [2024-06-21 16:46:39,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614144440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:39,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:39,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:46:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108261010] [2024-06-21 16:46:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:46:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:46:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:46:39,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:39,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 16:46:39,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:39,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:39,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:39,826 INFO L124 PetriNetUnfolderBase]: 1267/2005 cut-off events. [2024-06-21 16:46:39,827 INFO L125 PetriNetUnfolderBase]: For 4386/4392 co-relation queries the response was YES. [2024-06-21 16:46:39,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6437 conditions, 2005 events. 1267/2005 cut-off events. For 4386/4392 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9962 event pairs, 486 based on Foata normal form. 8/2000 useless extension candidates. Maximal degree in co-relation 6417. Up to 1818 conditions per place. [2024-06-21 16:46:39,837 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 47 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-21 16:46:39,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 428 flow [2024-06-21 16:46:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:46:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:46:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 16:46:39,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 16:46:39,838 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 122 transitions. [2024-06-21 16:46:39,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 428 flow [2024-06-21 16:46:39,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 398 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 16:46:39,845 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-21 16:46:39,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-21 16:46:39,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 16:46:39,848 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-21 16:46:39,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-21 16:46:39,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:39,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:39,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:46:39,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:39,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1299949913, now seen corresponding path program 1 times [2024-06-21 16:46:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366971266] [2024-06-21 16:46:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:40,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366971266] [2024-06-21 16:46:40,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366971266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:40,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:40,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:46:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514333804] [2024-06-21 16:46:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:40,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:46:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:46:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:46:40,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:40,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:40,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:40,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:40,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:41,010 INFO L124 PetriNetUnfolderBase]: 1325/2104 cut-off events. [2024-06-21 16:46:41,010 INFO L125 PetriNetUnfolderBase]: For 5380/5382 co-relation queries the response was YES. [2024-06-21 16:46:41,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6898 conditions, 2104 events. 1325/2104 cut-off events. For 5380/5382 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10492 event pairs, 520 based on Foata normal form. 6/2099 useless extension candidates. Maximal degree in co-relation 6876. Up to 1909 conditions per place. [2024-06-21 16:46:41,022 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-21 16:46:41,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 598 flow [2024-06-21 16:46:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:46:41,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 16:46:41,024 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:46:41,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 598 flow [2024-06-21 16:46:41,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 93 transitions, 542 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:41,028 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 380 flow [2024-06-21 16:46:41,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=380, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-21 16:46:41,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 16:46:41,029 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 380 flow [2024-06-21 16:46:41,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:41,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:41,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:41,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:46:41,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:41,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash 803841967, now seen corresponding path program 2 times [2024-06-21 16:46:41,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:41,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123823274] [2024-06-21 16:46:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123823274] [2024-06-21 16:46:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123823274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:46:41,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93235949] [2024-06-21 16:46:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:46:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:46:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:46:41,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:41,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:41,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:41,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:41,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:42,263 INFO L124 PetriNetUnfolderBase]: 1347/2142 cut-off events. [2024-06-21 16:46:42,263 INFO L125 PetriNetUnfolderBase]: For 7287/7291 co-relation queries the response was YES. [2024-06-21 16:46:42,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7563 conditions, 2142 events. 1347/2142 cut-off events. For 7287/7291 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10731 event pairs, 513 based on Foata normal form. 8/2134 useless extension candidates. Maximal degree in co-relation 7539. Up to 1918 conditions per place. [2024-06-21 16:46:42,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-21 16:46:42,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 670 flow [2024-06-21 16:46:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:46:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:46:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:46:42,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 16:46:42,285 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 380 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:46:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 670 flow [2024-06-21 16:46:42,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 630 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:42,292 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 439 flow [2024-06-21 16:46:42,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-21 16:46:42,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 16:46:42,294 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 439 flow [2024-06-21 16:46:42,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:42,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:42,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:42,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:46:42,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:42,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 878292687, now seen corresponding path program 3 times [2024-06-21 16:46:42,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050308041] [2024-06-21 16:46:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050308041] [2024-06-21 16:46:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050308041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:42,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:42,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:46:42,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511854724] [2024-06-21 16:46:42,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:46:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:46:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:46:43,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:43,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:43,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:43,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:43,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:43,584 INFO L124 PetriNetUnfolderBase]: 1369/2188 cut-off events. [2024-06-21 16:46:43,585 INFO L125 PetriNetUnfolderBase]: For 9800/9802 co-relation queries the response was YES. [2024-06-21 16:46:43,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 2188 events. 1369/2188 cut-off events. For 9800/9802 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11052 event pairs, 449 based on Foata normal form. 4/2176 useless extension candidates. Maximal degree in co-relation 8204. Up to 1834 conditions per place. [2024-06-21 16:46:43,594 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 37 changer transitions 0/102 dead transitions. [2024-06-21 16:46:43,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 807 flow [2024-06-21 16:46:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:46:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:46:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 16:46:43,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-21 16:46:43,595 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 439 flow. Second operand 7 states and 149 transitions. [2024-06-21 16:46:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 807 flow [2024-06-21 16:46:43,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 722 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:43,602 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 514 flow [2024-06-21 16:46:43,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-21 16:46:43,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 16:46:43,603 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 514 flow [2024-06-21 16:46:43,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:43,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:43,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:43,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:46:43,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:43,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -662169885, now seen corresponding path program 4 times [2024-06-21 16:46:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:43,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363585450] [2024-06-21 16:46:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:44,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363585450] [2024-06-21 16:46:44,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363585450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:44,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:44,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:46:44,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200206271] [2024-06-21 16:46:44,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:46:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:46:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:46:44,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:44,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:44,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:44,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:44,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:44,824 INFO L124 PetriNetUnfolderBase]: 1359/2175 cut-off events. [2024-06-21 16:46:44,824 INFO L125 PetriNetUnfolderBase]: For 9920/9922 co-relation queries the response was YES. [2024-06-21 16:46:44,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8159 conditions, 2175 events. 1359/2175 cut-off events. For 9920/9922 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10956 event pairs, 456 based on Foata normal form. 4/2156 useless extension candidates. Maximal degree in co-relation 8133. Up to 1826 conditions per place. [2024-06-21 16:46:44,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 37 changer transitions 0/97 dead transitions. [2024-06-21 16:46:44,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 760 flow [2024-06-21 16:46:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:46:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:46:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:46:44,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 16:46:44,838 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 514 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:46:44,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 760 flow [2024-06-21 16:46:44,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 702 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:44,846 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 538 flow [2024-06-21 16:46:44,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 16:46:44,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 16:46:44,847 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 538 flow [2024-06-21 16:46:44,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:44,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:44,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:44,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:46:44,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:44,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash 981339721, now seen corresponding path program 1 times [2024-06-21 16:46:44,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:44,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329921230] [2024-06-21 16:46:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:45,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:45,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329921230] [2024-06-21 16:46:45,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329921230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:45,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:45,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:46:45,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221280398] [2024-06-21 16:46:45,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:45,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:46:45,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:45,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:46:45,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:46:45,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:46:45,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 538 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:45,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:45,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:46:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:46,181 INFO L124 PetriNetUnfolderBase]: 1181/1978 cut-off events. [2024-06-21 16:46:46,182 INFO L125 PetriNetUnfolderBase]: For 9790/9792 co-relation queries the response was YES. [2024-06-21 16:46:46,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7491 conditions, 1978 events. 1181/1978 cut-off events. For 9790/9792 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10247 event pairs, 401 based on Foata normal form. 4/1967 useless extension candidates. Maximal degree in co-relation 7463. Up to 1735 conditions per place. [2024-06-21 16:46:46,190 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-06-21 16:46:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 825 flow [2024-06-21 16:46:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:46:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:46:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:46:46,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 16:46:46,192 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 538 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:46:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 825 flow [2024-06-21 16:46:46,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 722 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:46,197 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 519 flow [2024-06-21 16:46:46,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=519, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 16:46:46,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 16:46:46,198 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 519 flow [2024-06-21 16:46:46,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:46,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:46,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:46:46,199 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)] === [2024-06-21 16:46:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash -175741657, now seen corresponding path program 1 times [2024-06-21 16:46:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:46,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293127174] [2024-06-21 16:46:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:46,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:46,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293127174] [2024-06-21 16:46:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293127174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:46,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:46,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:46:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640542615] [2024-06-21 16:46:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:46,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:46:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:46:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:46:46,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 16:46:46,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:46,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:46,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 16:46:46,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:47,112 INFO L124 PetriNetUnfolderBase]: 1070/1845 cut-off events. [2024-06-21 16:46:47,113 INFO L125 PetriNetUnfolderBase]: For 10597/10607 co-relation queries the response was YES. [2024-06-21 16:46:47,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7289 conditions, 1845 events. 1070/1845 cut-off events. For 10597/10607 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9894 event pairs, 401 based on Foata normal form. 9/1830 useless extension candidates. Maximal degree in co-relation 7259. Up to 1605 conditions per place. [2024-06-21 16:46:47,122 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-21 16:46:47,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 719 flow [2024-06-21 16:46:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:46:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:46:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-21 16:46:47,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 16:46:47,123 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 519 flow. Second operand 5 states and 104 transitions. [2024-06-21 16:46:47,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 719 flow [2024-06-21 16:46:47,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 680 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:47,132 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 526 flow [2024-06-21 16:46:47,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=526, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-21 16:46:47,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 16:46:47,133 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 526 flow [2024-06-21 16:46:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:47,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:47,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:47,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:46:47,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:47,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1182515531, now seen corresponding path program 1 times [2024-06-21 16:46:47,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:47,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733083861] [2024-06-21 16:46:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:47,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733083861] [2024-06-21 16:46:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733083861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:47,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:47,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:46:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771621774] [2024-06-21 16:46:47,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:46:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:46:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:46:47,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:46:47,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:47,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:47,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:46:47,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:48,128 INFO L124 PetriNetUnfolderBase]: 1222/2021 cut-off events. [2024-06-21 16:46:48,128 INFO L125 PetriNetUnfolderBase]: For 14291/14301 co-relation queries the response was YES. [2024-06-21 16:46:48,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 2021 events. 1222/2021 cut-off events. For 14291/14301 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10560 event pairs, 473 based on Foata normal form. 9/2019 useless extension candidates. Maximal degree in co-relation 8445. Up to 1828 conditions per place. [2024-06-21 16:46:48,139 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 73 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-21 16:46:48,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 742 flow [2024-06-21 16:46:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:46:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:46:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 16:46:48,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 16:46:48,140 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 526 flow. Second operand 6 states and 116 transitions. [2024-06-21 16:46:48,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 742 flow [2024-06-21 16:46:48,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 718 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:48,148 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 558 flow [2024-06-21 16:46:48,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=558, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2024-06-21 16:46:48,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 16:46:48,149 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 558 flow [2024-06-21 16:46:48,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:48,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:48,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:48,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:46:48,150 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)] === [2024-06-21 16:46:48,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash -604790994, now seen corresponding path program 1 times [2024-06-21 16:46:48,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:48,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295501240] [2024-06-21 16:46:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:48,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:48,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295501240] [2024-06-21 16:46:48,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295501240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:48,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:48,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936950737] [2024-06-21 16:46:48,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:48,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:48,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:49,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:49,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:49,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:49,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:49,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:49,774 INFO L124 PetriNetUnfolderBase]: 1569/2503 cut-off events. [2024-06-21 16:46:49,774 INFO L125 PetriNetUnfolderBase]: For 23001/23005 co-relation queries the response was YES. [2024-06-21 16:46:49,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11273 conditions, 2503 events. 1569/2503 cut-off events. For 23001/23005 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13005 event pairs, 425 based on Foata normal form. 20/2521 useless extension candidates. Maximal degree in co-relation 11241. Up to 1936 conditions per place. [2024-06-21 16:46:49,834 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2024-06-21 16:46:49,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1048 flow [2024-06-21 16:46:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 16:46:49,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-21 16:46:49,837 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 558 flow. Second operand 9 states and 187 transitions. [2024-06-21 16:46:49,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1048 flow [2024-06-21 16:46:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1014 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:49,851 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 628 flow [2024-06-21 16:46:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=628, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-21 16:46:49,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 16:46:49,852 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 628 flow [2024-06-21 16:46:49,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:49,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:49,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:49,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:46:49,853 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)] === [2024-06-21 16:46:49,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash -601934034, now seen corresponding path program 2 times [2024-06-21 16:46:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147015975] [2024-06-21 16:46:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:49,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:50,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:50,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147015975] [2024-06-21 16:46:50,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147015975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:50,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:50,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461617093] [2024-06-21 16:46:50,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:50,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:50,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:50,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 628 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:50,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:50,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:50,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:51,461 INFO L124 PetriNetUnfolderBase]: 1533/2443 cut-off events. [2024-06-21 16:46:51,462 INFO L125 PetriNetUnfolderBase]: For 24915/24919 co-relation queries the response was YES. [2024-06-21 16:46:51,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 2443 events. 1533/2443 cut-off events. For 24915/24919 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12561 event pairs, 529 based on Foata normal form. 24/2465 useless extension candidates. Maximal degree in co-relation 11173. Up to 2060 conditions per place. [2024-06-21 16:46:51,473 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-21 16:46:51,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 123 transitions, 984 flow [2024-06-21 16:46:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:46:51,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 16:46:51,475 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 628 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:46:51,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 123 transitions, 984 flow [2024-06-21 16:46:51,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 939 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:51,491 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 646 flow [2024-06-21 16:46:51,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=646, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-21 16:46:51,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 16:46:51,492 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 646 flow [2024-06-21 16:46:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:51,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:51,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:46:51,492 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)] === [2024-06-21 16:46:51,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2069236146, now seen corresponding path program 3 times [2024-06-21 16:46:51,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:51,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356301113] [2024-06-21 16:46:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356301113] [2024-06-21 16:46:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356301113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:52,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:52,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498334762] [2024-06-21 16:46:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:52,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:52,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 646 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:52,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:52,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:52,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:52,950 INFO L124 PetriNetUnfolderBase]: 1608/2574 cut-off events. [2024-06-21 16:46:52,950 INFO L125 PetriNetUnfolderBase]: For 28467/28472 co-relation queries the response was YES. [2024-06-21 16:46:52,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11972 conditions, 2574 events. 1608/2574 cut-off events. For 28467/28472 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13513 event pairs, 493 based on Foata normal form. 20/2590 useless extension candidates. Maximal degree in co-relation 11937. Up to 2090 conditions per place. [2024-06-21 16:46:52,963 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 40 changer transitions 0/122 dead transitions. [2024-06-21 16:46:52,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1010 flow [2024-06-21 16:46:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:46:52,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:46:52,973 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 646 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:46:52,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1010 flow [2024-06-21 16:46:52,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 949 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:52,989 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 694 flow [2024-06-21 16:46:52,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-06-21 16:46:52,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 16:46:52,989 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 694 flow [2024-06-21 16:46:52,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:52,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:52,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:52,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:46:52,990 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)] === [2024-06-21 16:46:52,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2069051448, now seen corresponding path program 1 times [2024-06-21 16:46:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410844119] [2024-06-21 16:46:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:53,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410844119] [2024-06-21 16:46:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410844119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:53,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:53,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:53,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049642012] [2024-06-21 16:46:53,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:53,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:53,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:53,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:53,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:54,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:54,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:54,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:54,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:54,715 INFO L124 PetriNetUnfolderBase]: 1625/2598 cut-off events. [2024-06-21 16:46:54,715 INFO L125 PetriNetUnfolderBase]: For 30681/30688 co-relation queries the response was YES. [2024-06-21 16:46:54,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12359 conditions, 2598 events. 1625/2598 cut-off events. For 30681/30688 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13646 event pairs, 504 based on Foata normal form. 8/2602 useless extension candidates. Maximal degree in co-relation 12323. Up to 2337 conditions per place. [2024-06-21 16:46:54,729 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-06-21 16:46:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1067 flow [2024-06-21 16:46:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:46:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 16:46:54,731 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 694 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:46:54,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1067 flow [2024-06-21 16:46:54,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 978 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:54,751 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 722 flow [2024-06-21 16:46:54,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=722, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-06-21 16:46:54,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 16:46:54,752 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 722 flow [2024-06-21 16:46:54,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:54,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:54,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:46:54,753 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:54,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1724891700, now seen corresponding path program 1 times [2024-06-21 16:46:54,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:54,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263537410] [2024-06-21 16:46:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:54,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:55,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263537410] [2024-06-21 16:46:55,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263537410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:55,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:55,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:46:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870380980] [2024-06-21 16:46:55,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:55,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:46:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:46:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:46:55,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:46:55,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 722 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:55,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:55,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:46:55,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:55,766 INFO L124 PetriNetUnfolderBase]: 1546/2512 cut-off events. [2024-06-21 16:46:55,767 INFO L125 PetriNetUnfolderBase]: For 33009/33019 co-relation queries the response was YES. [2024-06-21 16:46:55,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12343 conditions, 2512 events. 1546/2512 cut-off events. For 33009/33019 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13459 event pairs, 512 based on Foata normal form. 10/2509 useless extension candidates. Maximal degree in co-relation 12305. Up to 2240 conditions per place. [2024-06-21 16:46:55,781 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 76 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2024-06-21 16:46:55,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 111 transitions, 982 flow [2024-06-21 16:46:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:46:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:46:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 16:46:55,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 16:46:55,782 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 722 flow. Second operand 6 states and 122 transitions. [2024-06-21 16:46:55,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 111 transitions, 982 flow [2024-06-21 16:46:55,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 911 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:55,800 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 733 flow [2024-06-21 16:46:55,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=733, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-06-21 16:46:55,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 16:46:55,801 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 733 flow [2024-06-21 16:46:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:55,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:55,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:55,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:46:55,802 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)] === [2024-06-21 16:46:55,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:55,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2061943984, now seen corresponding path program 4 times [2024-06-21 16:46:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442680409] [2024-06-21 16:46:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:56,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:56,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442680409] [2024-06-21 16:46:56,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442680409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:56,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:56,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:56,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141240211] [2024-06-21 16:46:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:56,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:56,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:56,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:56,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 733 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:56,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:56,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:56,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:57,253 INFO L124 PetriNetUnfolderBase]: 1690/2695 cut-off events. [2024-06-21 16:46:57,254 INFO L125 PetriNetUnfolderBase]: For 38438/38440 co-relation queries the response was YES. [2024-06-21 16:46:57,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13416 conditions, 2695 events. 1690/2695 cut-off events. For 38438/38440 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14058 event pairs, 508 based on Foata normal form. 20/2703 useless extension candidates. Maximal degree in co-relation 13377. Up to 2208 conditions per place. [2024-06-21 16:46:57,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 41 changer transitions 0/129 dead transitions. [2024-06-21 16:46:57,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1119 flow [2024-06-21 16:46:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:46:57,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 16:46:57,269 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 733 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:46:57,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1119 flow [2024-06-21 16:46:57,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 1067 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:57,288 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 796 flow [2024-06-21 16:46:57,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=796, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-06-21 16:46:57,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 16:46:57,288 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 796 flow [2024-06-21 16:46:57,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:57,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:57,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:57,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:46:57,289 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)] === [2024-06-21 16:46:57,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1833858136, now seen corresponding path program 2 times [2024-06-21 16:46:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258447206] [2024-06-21 16:46:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:57,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258447206] [2024-06-21 16:46:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258447206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:58,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211022912] [2024-06-21 16:46:58,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:58,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:58,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:58,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:58,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 796 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:58,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:58,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:58,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:58,892 INFO L124 PetriNetUnfolderBase]: 1718/2756 cut-off events. [2024-06-21 16:46:58,892 INFO L125 PetriNetUnfolderBase]: For 40741/40753 co-relation queries the response was YES. [2024-06-21 16:46:58,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13984 conditions, 2756 events. 1718/2756 cut-off events. For 40741/40753 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14582 event pairs, 533 based on Foata normal form. 12/2762 useless extension candidates. Maximal degree in co-relation 13944. Up to 2467 conditions per place. [2024-06-21 16:46:58,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-21 16:46:58,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 132 transitions, 1210 flow [2024-06-21 16:46:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:46:58,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 16:46:58,909 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 796 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:46:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 132 transitions, 1210 flow [2024-06-21 16:46:58,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 132 transitions, 1109 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:58,933 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 863 flow [2024-06-21 16:46:58,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=863, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-06-21 16:46:58,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 16:46:58,934 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 863 flow [2024-06-21 16:46:58,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:58,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:58,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:58,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:46:58,935 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)] === [2024-06-21 16:46:58,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1825287256, now seen corresponding path program 3 times [2024-06-21 16:46:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:58,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018077016] [2024-06-21 16:46:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:58,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:59,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018077016] [2024-06-21 16:46:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018077016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188113673] [2024-06-21 16:46:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:59,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:59,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:46:59,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:59,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:59,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:46:59,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:00,216 INFO L124 PetriNetUnfolderBase]: 1735/2783 cut-off events. [2024-06-21 16:47:00,216 INFO L125 PetriNetUnfolderBase]: For 44284/44296 co-relation queries the response was YES. [2024-06-21 16:47:00,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14458 conditions, 2783 events. 1735/2783 cut-off events. For 44284/44296 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14735 event pairs, 479 based on Foata normal form. 12/2789 useless extension candidates. Maximal degree in co-relation 14416. Up to 2411 conditions per place. [2024-06-21 16:47:00,234 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 39 changer transitions 0/139 dead transitions. [2024-06-21 16:47:00,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 1359 flow [2024-06-21 16:47:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:47:00,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:47:00,235 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 863 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:47:00,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 1359 flow [2024-06-21 16:47:00,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1293 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:47:00,265 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 958 flow [2024-06-21 16:47:00,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=958, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-21 16:47:00,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 16:47:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 958 flow [2024-06-21 16:47:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:00,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:00,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:00,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:47:00,267 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)] === [2024-06-21 16:47:00,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2061759286, now seen corresponding path program 4 times [2024-06-21 16:47:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:00,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792494999] [2024-06-21 16:47:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792494999] [2024-06-21 16:47:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792494999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:01,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543196609] [2024-06-21 16:47:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:01,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:01,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 958 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:01,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:01,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:01,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:01,772 INFO L124 PetriNetUnfolderBase]: 1727/2781 cut-off events. [2024-06-21 16:47:01,772 INFO L125 PetriNetUnfolderBase]: For 47030/47042 co-relation queries the response was YES. [2024-06-21 16:47:01,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14364 conditions, 2781 events. 1727/2781 cut-off events. For 47030/47042 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14801 event pairs, 541 based on Foata normal form. 12/2787 useless extension candidates. Maximal degree in co-relation 14321. Up to 2482 conditions per place. [2024-06-21 16:47:01,788 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 31 changer transitions 0/136 dead transitions. [2024-06-21 16:47:01,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 136 transitions, 1300 flow [2024-06-21 16:47:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:47:01,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 16:47:01,790 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 958 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:47:01,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 136 transitions, 1300 flow [2024-06-21 16:47:01,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 136 transitions, 1210 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:01,822 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 937 flow [2024-06-21 16:47:01,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-06-21 16:47:01,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 16:47:01,823 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 937 flow [2024-06-21 16:47:01,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:01,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:01,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:01,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:47:01,823 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:01,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1996711976, now seen corresponding path program 2 times [2024-06-21 16:47:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:01,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139555644] [2024-06-21 16:47:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:02,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139555644] [2024-06-21 16:47:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139555644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:02,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:47:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015856905] [2024-06-21 16:47:02,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:47:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:47:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:47:02,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:47:02,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:02,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:02,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:47:02,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:02,878 INFO L124 PetriNetUnfolderBase]: 1610/2644 cut-off events. [2024-06-21 16:47:02,878 INFO L125 PetriNetUnfolderBase]: For 49812/49820 co-relation queries the response was YES. [2024-06-21 16:47:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13802 conditions, 2644 events. 1610/2644 cut-off events. For 49812/49820 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14495 event pairs, 535 based on Foata normal form. 7/2623 useless extension candidates. Maximal degree in co-relation 13757. Up to 2329 conditions per place. [2024-06-21 16:47:02,894 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 77 selfloop transitions, 26 changer transitions 0/122 dead transitions. [2024-06-21 16:47:02,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 1199 flow [2024-06-21 16:47:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:47:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:47:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 16:47:02,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 16:47:02,896 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 937 flow. Second operand 6 states and 118 transitions. [2024-06-21 16:47:02,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 1199 flow [2024-06-21 16:47:02,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 122 transitions, 1095 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 16:47:02,922 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 927 flow [2024-06-21 16:47:02,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=927, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-21 16:47:02,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 16:47:02,923 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 927 flow [2024-06-21 16:47:02,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:02,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:02,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:47:02,924 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:02,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1991004008, now seen corresponding path program 1 times [2024-06-21 16:47:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383004335] [2024-06-21 16:47:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:03,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:03,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383004335] [2024-06-21 16:47:03,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383004335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:03,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:03,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:47:03,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208008369] [2024-06-21 16:47:03,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:03,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:47:03,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:03,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:47:03,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:47:03,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:47:03,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 927 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:03,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:03,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:47:03,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:03,931 INFO L124 PetriNetUnfolderBase]: 1561/2580 cut-off events. [2024-06-21 16:47:03,931 INFO L125 PetriNetUnfolderBase]: For 46224/46226 co-relation queries the response was YES. [2024-06-21 16:47:03,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13477 conditions, 2580 events. 1561/2580 cut-off events. For 46224/46226 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14072 event pairs, 464 based on Foata normal form. 2/2580 useless extension candidates. Maximal degree in co-relation 13433. Up to 2334 conditions per place. [2024-06-21 16:47:03,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 110 selfloop transitions, 11 changer transitions 0/129 dead transitions. [2024-06-21 16:47:03,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 1239 flow [2024-06-21 16:47:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:47:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:47:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 16:47:03,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:47:03,957 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 927 flow. Second operand 6 states and 120 transitions. [2024-06-21 16:47:03,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 1239 flow [2024-06-21 16:47:03,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 1167 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:03,983 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 919 flow [2024-06-21 16:47:03,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=919, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2024-06-21 16:47:03,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-21 16:47:03,984 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 919 flow [2024-06-21 16:47:03,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:03,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:03,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:03,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:47:03,985 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:03,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1383963578, now seen corresponding path program 2 times [2024-06-21 16:47:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061009812] [2024-06-21 16:47:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:04,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061009812] [2024-06-21 16:47:04,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061009812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:04,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:04,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:47:04,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158132377] [2024-06-21 16:47:04,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:04,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:47:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:47:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:47:04,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:47:04,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:04,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:04,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:47:04,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:04,982 INFO L124 PetriNetUnfolderBase]: 1563/2586 cut-off events. [2024-06-21 16:47:04,983 INFO L125 PetriNetUnfolderBase]: For 49711/49716 co-relation queries the response was YES. [2024-06-21 16:47:04,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13826 conditions, 2586 events. 1563/2586 cut-off events. For 49711/49716 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14109 event pairs, 468 based on Foata normal form. 4/2587 useless extension candidates. Maximal degree in co-relation 13781. Up to 2328 conditions per place. [2024-06-21 16:47:04,998 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 106 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-21 16:47:04,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 130 transitions, 1233 flow [2024-06-21 16:47:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:47:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:47:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 16:47:04,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:47:05,000 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 919 flow. Second operand 6 states and 120 transitions. [2024-06-21 16:47:05,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 130 transitions, 1233 flow [2024-06-21 16:47:05,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1191 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:05,024 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 957 flow [2024-06-21 16:47:05,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=957, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2024-06-21 16:47:05,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 16:47:05,024 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 957 flow [2024-06-21 16:47:05,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:05,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:05,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:05,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:47:05,025 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:05,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1996725864, now seen corresponding path program 1 times [2024-06-21 16:47:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608274826] [2024-06-21 16:47:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:05,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:05,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608274826] [2024-06-21 16:47:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608274826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:05,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:05,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924152984] [2024-06-21 16:47:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:05,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:05,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:47:05,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 957 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:05,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:05,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:47:05,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:06,168 INFO L124 PetriNetUnfolderBase]: 1526/2531 cut-off events. [2024-06-21 16:47:06,168 INFO L125 PetriNetUnfolderBase]: For 52903/52913 co-relation queries the response was YES. [2024-06-21 16:47:06,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13902 conditions, 2531 events. 1526/2531 cut-off events. For 52903/52913 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13900 event pairs, 484 based on Foata normal form. 9/2527 useless extension candidates. Maximal degree in co-relation 13856. Up to 2284 conditions per place. [2024-06-21 16:47:06,185 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 100 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2024-06-21 16:47:06,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 132 transitions, 1247 flow [2024-06-21 16:47:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:47:06,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 16:47:06,186 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 957 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:47:06,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 132 transitions, 1247 flow [2024-06-21 16:47:06,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 132 transitions, 1189 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:06,219 INFO L231 Difference]: Finished difference. Result has 112 places, 122 transitions, 973 flow [2024-06-21 16:47:06,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=973, PETRI_PLACES=112, PETRI_TRANSITIONS=122} [2024-06-21 16:47:06,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 16:47:06,220 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 122 transitions, 973 flow [2024-06-21 16:47:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:06,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:06,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:06,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:47:06,221 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)] === [2024-06-21 16:47:06,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2029982990, now seen corresponding path program 1 times [2024-06-21 16:47:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884064992] [2024-06-21 16:47:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:06,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:07,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:07,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884064992] [2024-06-21 16:47:07,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884064992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:07,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414907861] [2024-06-21 16:47:07,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:07,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:07,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 122 transitions, 973 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:07,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:07,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:07,866 INFO L124 PetriNetUnfolderBase]: 1850/3005 cut-off events. [2024-06-21 16:47:07,866 INFO L125 PetriNetUnfolderBase]: For 70751/70756 co-relation queries the response was YES. [2024-06-21 16:47:07,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16991 conditions, 3005 events. 1850/3005 cut-off events. For 70751/70756 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16447 event pairs, 531 based on Foata normal form. 12/3013 useless extension candidates. Maximal degree in co-relation 16944. Up to 2310 conditions per place. [2024-06-21 16:47:07,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 55 changer transitions 0/169 dead transitions. [2024-06-21 16:47:07,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 1544 flow [2024-06-21 16:47:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 16:47:07,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-21 16:47:07,886 INFO L175 Difference]: Start difference. First operand has 112 places, 122 transitions, 973 flow. Second operand 9 states and 186 transitions. [2024-06-21 16:47:07,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 1544 flow [2024-06-21 16:47:07,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1492 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:07,928 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 1179 flow [2024-06-21 16:47:07,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1179, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-06-21 16:47:07,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 16:47:07,928 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 1179 flow [2024-06-21 16:47:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:07,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:07,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:07,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:47:07,929 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:07,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1756566292, now seen corresponding path program 1 times [2024-06-21 16:47:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921072478] [2024-06-21 16:47:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921072478] [2024-06-21 16:47:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921072478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133922323] [2024-06-21 16:47:08,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:08,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:08,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:08,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 1179 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:08,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:08,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:08,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:09,095 INFO L124 PetriNetUnfolderBase]: 1796/2928 cut-off events. [2024-06-21 16:47:09,096 INFO L125 PetriNetUnfolderBase]: For 73989/74005 co-relation queries the response was YES. [2024-06-21 16:47:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17265 conditions, 2928 events. 1796/2928 cut-off events. For 73989/74005 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16226 event pairs, 555 based on Foata normal form. 10/2917 useless extension candidates. Maximal degree in co-relation 17215. Up to 2679 conditions per place. [2024-06-21 16:47:09,116 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 109 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-21 16:47:09,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 150 transitions, 1523 flow [2024-06-21 16:47:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:47:09,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 16:47:09,117 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 1179 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:47:09,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 150 transitions, 1523 flow [2024-06-21 16:47:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 150 transitions, 1431 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:09,163 INFO L231 Difference]: Finished difference. Result has 121 places, 135 transitions, 1181 flow [2024-06-21 16:47:09,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1181, PETRI_PLACES=121, PETRI_TRANSITIONS=135} [2024-06-21 16:47:09,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 16:47:09,164 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 135 transitions, 1181 flow [2024-06-21 16:47:09,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:09,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:09,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:09,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:47:09,165 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)] === [2024-06-21 16:47:09,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash 509973072, now seen corresponding path program 2 times [2024-06-21 16:47:09,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:09,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074740536] [2024-06-21 16:47:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:10,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074740536] [2024-06-21 16:47:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074740536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:10,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:10,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286808937] [2024-06-21 16:47:10,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:10,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:10,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:10,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:10,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 135 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:10,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:10,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:10,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:10,835 INFO L124 PetriNetUnfolderBase]: 1980/3240 cut-off events. [2024-06-21 16:47:10,835 INFO L125 PetriNetUnfolderBase]: For 83054/83056 co-relation queries the response was YES. [2024-06-21 16:47:10,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19002 conditions, 3240 events. 1980/3240 cut-off events. For 83054/83056 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18269 event pairs, 568 based on Foata normal form. 12/3240 useless extension candidates. Maximal degree in co-relation 18951. Up to 2613 conditions per place. [2024-06-21 16:47:10,857 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-21 16:47:10,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 1718 flow [2024-06-21 16:47:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:47:10,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-21 16:47:10,858 INFO L175 Difference]: Start difference. First operand has 121 places, 135 transitions, 1181 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:47:10,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 1718 flow [2024-06-21 16:47:10,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 1646 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:10,921 INFO L231 Difference]: Finished difference. Result has 127 places, 141 transitions, 1322 flow [2024-06-21 16:47:10,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1322, PETRI_PLACES=127, PETRI_TRANSITIONS=141} [2024-06-21 16:47:10,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-21 16:47:10,923 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 141 transitions, 1322 flow [2024-06-21 16:47:10,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:10,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:10,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:10,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:47:10,924 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:10,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:10,924 INFO L85 PathProgramCache]: Analyzing trace with hash 703912482, now seen corresponding path program 3 times [2024-06-21 16:47:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916520488] [2024-06-21 16:47:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:10,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:11,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:11,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916520488] [2024-06-21 16:47:11,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916520488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:11,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:11,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:11,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252805185] [2024-06-21 16:47:11,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:11,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:11,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:11,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:11,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 141 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:11,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:11,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:11,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:12,373 INFO L124 PetriNetUnfolderBase]: 2062/3392 cut-off events. [2024-06-21 16:47:12,374 INFO L125 PetriNetUnfolderBase]: For 91364/91366 co-relation queries the response was YES. [2024-06-21 16:47:12,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20279 conditions, 3392 events. 2062/3392 cut-off events. For 91364/91366 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19485 event pairs, 593 based on Foata normal form. 12/3392 useless extension candidates. Maximal degree in co-relation 20225. Up to 2755 conditions per place. [2024-06-21 16:47:12,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 61 changer transitions 0/179 dead transitions. [2024-06-21 16:47:12,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 1864 flow [2024-06-21 16:47:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 16:47:12,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 16:47:12,399 INFO L175 Difference]: Start difference. First operand has 127 places, 141 transitions, 1322 flow. Second operand 9 states and 183 transitions. [2024-06-21 16:47:12,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 1864 flow [2024-06-21 16:47:12,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 1747 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:12,497 INFO L231 Difference]: Finished difference. Result has 133 places, 145 transitions, 1411 flow [2024-06-21 16:47:12,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=133, PETRI_TRANSITIONS=145} [2024-06-21 16:47:12,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 16:47:12,498 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 145 transitions, 1411 flow [2024-06-21 16:47:12,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:12,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:12,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:12,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:47:12,498 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:12,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -749328590, now seen corresponding path program 4 times [2024-06-21 16:47:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236774793] [2024-06-21 16:47:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:13,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:13,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236774793] [2024-06-21 16:47:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236774793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:13,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229288167] [2024-06-21 16:47:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:13,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:13,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:13,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:13,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 145 transitions, 1411 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:13,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:13,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:13,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:13,995 INFO L124 PetriNetUnfolderBase]: 2046/3364 cut-off events. [2024-06-21 16:47:13,995 INFO L125 PetriNetUnfolderBase]: For 93713/93719 co-relation queries the response was YES. [2024-06-21 16:47:14,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20023 conditions, 3364 events. 2046/3364 cut-off events. For 93713/93719 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19224 event pairs, 515 based on Foata normal form. 12/3362 useless extension candidates. Maximal degree in co-relation 19967. Up to 2163 conditions per place. [2024-06-21 16:47:14,021 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 71 changer transitions 0/179 dead transitions. [2024-06-21 16:47:14,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 179 transitions, 1843 flow [2024-06-21 16:47:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:47:14,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 16:47:14,022 INFO L175 Difference]: Start difference. First operand has 133 places, 145 transitions, 1411 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:47:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 179 transitions, 1843 flow [2024-06-21 16:47:14,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 179 transitions, 1729 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:14,087 INFO L231 Difference]: Finished difference. Result has 137 places, 144 transitions, 1399 flow [2024-06-21 16:47:14,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1399, PETRI_PLACES=137, PETRI_TRANSITIONS=144} [2024-06-21 16:47:14,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 16:47:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 144 transitions, 1399 flow [2024-06-21 16:47:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:14,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:14,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:47:14,089 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)] === [2024-06-21 16:47:14,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1768530742, now seen corresponding path program 2 times [2024-06-21 16:47:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154354179] [2024-06-21 16:47:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:14,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154354179] [2024-06-21 16:47:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154354179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:14,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:14,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:14,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423936821] [2024-06-21 16:47:14,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:14,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:14,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:14,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 144 transitions, 1399 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:14,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:14,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:15,290 INFO L124 PetriNetUnfolderBase]: 1959/3226 cut-off events. [2024-06-21 16:47:15,291 INFO L125 PetriNetUnfolderBase]: For 92880/92894 co-relation queries the response was YES. [2024-06-21 16:47:15,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19566 conditions, 3226 events. 1959/3226 cut-off events. For 92880/92894 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18599 event pairs, 591 based on Foata normal form. 10/3189 useless extension candidates. Maximal degree in co-relation 19509. Up to 2940 conditions per place. [2024-06-21 16:47:15,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 108 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-21 16:47:15,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 161 transitions, 1857 flow [2024-06-21 16:47:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:47:15,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 16:47:15,312 INFO L175 Difference]: Start difference. First operand has 137 places, 144 transitions, 1399 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:47:15,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 161 transitions, 1857 flow [2024-06-21 16:47:15,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 161 transitions, 1671 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:47:15,359 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1377 flow [2024-06-21 16:47:15,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1377, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2024-06-21 16:47:15,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 16:47:15,359 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1377 flow [2024-06-21 16:47:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:15,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:15,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:15,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:47:15,360 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)] === [2024-06-21 16:47:15,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1280687018, now seen corresponding path program 3 times [2024-06-21 16:47:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:15,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438719737] [2024-06-21 16:47:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:16,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438719737] [2024-06-21 16:47:16,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438719737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:16,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422495468] [2024-06-21 16:47:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:16,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:16,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:16,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:16,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:16,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:16,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:16,511 INFO L124 PetriNetUnfolderBase]: 1953/3218 cut-off events. [2024-06-21 16:47:16,511 INFO L125 PetriNetUnfolderBase]: For 96233/96249 co-relation queries the response was YES. [2024-06-21 16:47:16,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19447 conditions, 3218 events. 1953/3218 cut-off events. For 96233/96249 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18524 event pairs, 590 based on Foata normal form. 15/3186 useless extension candidates. Maximal degree in co-relation 19390. Up to 2935 conditions per place. [2024-06-21 16:47:16,534 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 106 selfloop transitions, 37 changer transitions 0/160 dead transitions. [2024-06-21 16:47:16,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 160 transitions, 1691 flow [2024-06-21 16:47:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 16:47:16,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 16:47:16,535 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1377 flow. Second operand 7 states and 128 transitions. [2024-06-21 16:47:16,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 160 transitions, 1691 flow [2024-06-21 16:47:16,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 160 transitions, 1593 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:47:16,590 INFO L231 Difference]: Finished difference. Result has 140 places, 150 transitions, 1359 flow [2024-06-21 16:47:16,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=140, PETRI_TRANSITIONS=150} [2024-06-21 16:47:16,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 16:47:16,591 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 150 transitions, 1359 flow [2024-06-21 16:47:16,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:16,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:16,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:47:16,591 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:16,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 418849320, now seen corresponding path program 1 times [2024-06-21 16:47:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284918323] [2024-06-21 16:47:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284918323] [2024-06-21 16:47:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284918323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:17,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:17,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527222039] [2024-06-21 16:47:17,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:17,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:17,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:17,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:47:17,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 150 transitions, 1359 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:17,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:17,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:47:17,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:17,857 INFO L124 PetriNetUnfolderBase]: 1874/3170 cut-off events. [2024-06-21 16:47:17,857 INFO L125 PetriNetUnfolderBase]: For 86640/86642 co-relation queries the response was YES. [2024-06-21 16:47:17,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 3170 events. 1874/3170 cut-off events. For 86640/86642 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18683 event pairs, 522 based on Foata normal form. 1/3169 useless extension candidates. Maximal degree in co-relation 18460. Up to 2855 conditions per place. [2024-06-21 16:47:17,878 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 14 changer transitions 0/169 dead transitions. [2024-06-21 16:47:17,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 169 transitions, 1767 flow [2024-06-21 16:47:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:47:17,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 16:47:17,880 INFO L175 Difference]: Start difference. First operand has 140 places, 150 transitions, 1359 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:47:17,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 169 transitions, 1767 flow [2024-06-21 16:47:17,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1685 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:17,934 INFO L231 Difference]: Finished difference. Result has 141 places, 153 transitions, 1361 flow [2024-06-21 16:47:17,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1361, PETRI_PLACES=141, PETRI_TRANSITIONS=153} [2024-06-21 16:47:17,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 16:47:17,935 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 153 transitions, 1361 flow [2024-06-21 16:47:17,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:17,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:17,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:17,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:47:17,935 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:17,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1591583734, now seen corresponding path program 1 times [2024-06-21 16:47:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:17,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84382299] [2024-06-21 16:47:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:17,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84382299] [2024-06-21 16:47:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84382299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641448024] [2024-06-21 16:47:18,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:18,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:18,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 153 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:18,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:18,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:18,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:19,097 INFO L124 PetriNetUnfolderBase]: 1961/3261 cut-off events. [2024-06-21 16:47:19,098 INFO L125 PetriNetUnfolderBase]: For 92012/92014 co-relation queries the response was YES. [2024-06-21 16:47:19,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3261 events. 1961/3261 cut-off events. For 92012/92014 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18874 event pairs, 549 based on Foata normal form. 2/3261 useless extension candidates. Maximal degree in co-relation 19288. Up to 3022 conditions per place. [2024-06-21 16:47:19,119 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2024-06-21 16:47:19,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 171 transitions, 1789 flow [2024-06-21 16:47:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:47:19,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 16:47:19,120 INFO L175 Difference]: Start difference. First operand has 141 places, 153 transitions, 1361 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:47:19,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 171 transitions, 1789 flow [2024-06-21 16:47:19,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 171 transitions, 1727 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:19,182 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1383 flow [2024-06-21 16:47:19,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1383, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2024-06-21 16:47:19,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 16:47:19,182 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1383 flow [2024-06-21 16:47:19,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:19,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:19,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:19,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:47:19,183 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:19,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash 423611106, now seen corresponding path program 2 times [2024-06-21 16:47:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:19,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675244374] [2024-06-21 16:47:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:19,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675244374] [2024-06-21 16:47:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675244374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:19,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:19,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254010748] [2024-06-21 16:47:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:19,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:19,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:19,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:19,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:19,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:19,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:20,488 INFO L124 PetriNetUnfolderBase]: 1979/3289 cut-off events. [2024-06-21 16:47:20,488 INFO L125 PetriNetUnfolderBase]: For 97998/98003 co-relation queries the response was YES. [2024-06-21 16:47:20,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20005 conditions, 3289 events. 1979/3289 cut-off events. For 97998/98003 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19047 event pairs, 556 based on Foata normal form. 4/3290 useless extension candidates. Maximal degree in co-relation 19944. Up to 3018 conditions per place. [2024-06-21 16:47:20,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 144 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-21 16:47:20,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 176 transitions, 1945 flow [2024-06-21 16:47:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:47:20,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:47:20,514 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1383 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:47:20,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 176 transitions, 1945 flow [2024-06-21 16:47:20,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 176 transitions, 1883 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:20,585 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1485 flow [2024-06-21 16:47:20,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1485, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-21 16:47:20,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 16:47:20,586 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1485 flow [2024-06-21 16:47:20,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:20,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:20,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:20,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:47:20,586 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:20,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1768952404, now seen corresponding path program 3 times [2024-06-21 16:47:20,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:20,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939980927] [2024-06-21 16:47:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939980927] [2024-06-21 16:47:21,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939980927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:21,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:21,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:21,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295044959] [2024-06-21 16:47:21,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:21,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:21,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:21,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:21,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:21,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:21,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:21,795 INFO L124 PetriNetUnfolderBase]: 1973/3281 cut-off events. [2024-06-21 16:47:21,795 INFO L125 PetriNetUnfolderBase]: For 103412/103417 co-relation queries the response was YES. [2024-06-21 16:47:21,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20308 conditions, 3281 events. 1973/3281 cut-off events. For 103412/103417 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19019 event pairs, 553 based on Foata normal form. 4/3282 useless extension candidates. Maximal degree in co-relation 20246. Up to 3013 conditions per place. [2024-06-21 16:47:21,821 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 27 changer transitions 0/175 dead transitions. [2024-06-21 16:47:21,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 1875 flow [2024-06-21 16:47:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:47:21,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 16:47:21,822 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1485 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:47:21,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 1875 flow [2024-06-21 16:47:21,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 175 transitions, 1771 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 16:47:21,898 INFO L231 Difference]: Finished difference. Result has 149 places, 162 transitions, 1441 flow [2024-06-21 16:47:21,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=149, PETRI_TRANSITIONS=162} [2024-06-21 16:47:21,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 16:47:21,899 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 162 transitions, 1441 flow [2024-06-21 16:47:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:21,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:47:21,899 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)] === [2024-06-21 16:47:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 886905607, now seen corresponding path program 1 times [2024-06-21 16:47:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742149142] [2024-06-21 16:47:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742149142] [2024-06-21 16:47:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742149142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:22,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:22,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555777457] [2024-06-21 16:47:22,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:22,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:22,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 162 transitions, 1441 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:22,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:22,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:23,067 INFO L124 PetriNetUnfolderBase]: 2081/3421 cut-off events. [2024-06-21 16:47:23,068 INFO L125 PetriNetUnfolderBase]: For 128228/128235 co-relation queries the response was YES. [2024-06-21 16:47:23,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22090 conditions, 3421 events. 2081/3421 cut-off events. For 128228/128235 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19787 event pairs, 588 based on Foata normal form. 8/3426 useless extension candidates. Maximal degree in co-relation 22026. Up to 3105 conditions per place. [2024-06-21 16:47:23,095 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 22 changer transitions 0/186 dead transitions. [2024-06-21 16:47:23,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 1905 flow [2024-06-21 16:47:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:47:23,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 16:47:23,096 INFO L175 Difference]: Start difference. First operand has 149 places, 162 transitions, 1441 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:47:23,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 1905 flow [2024-06-21 16:47:23,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 186 transitions, 1843 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:23,176 INFO L231 Difference]: Finished difference. Result has 150 places, 165 transitions, 1479 flow [2024-06-21 16:47:23,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1479, PETRI_PLACES=150, PETRI_TRANSITIONS=165} [2024-06-21 16:47:23,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 16:47:23,177 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 165 transitions, 1479 flow [2024-06-21 16:47:23,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:23,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:23,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:23,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:47:23,178 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:23,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash 892619527, now seen corresponding path program 2 times [2024-06-21 16:47:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483146823] [2024-06-21 16:47:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:23,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483146823] [2024-06-21 16:47:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483146823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:23,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:23,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:23,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953608415] [2024-06-21 16:47:23,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:23,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:23,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:23,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:23,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:23,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:23,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 165 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:23,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:23,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:23,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:24,285 INFO L124 PetriNetUnfolderBase]: 2105/3461 cut-off events. [2024-06-21 16:47:24,286 INFO L125 PetriNetUnfolderBase]: For 137529/137536 co-relation queries the response was YES. [2024-06-21 16:47:24,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22933 conditions, 3461 events. 2105/3461 cut-off events. For 137529/137536 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20074 event pairs, 589 based on Foata normal form. 8/3466 useless extension candidates. Maximal degree in co-relation 22868. Up to 3121 conditions per place. [2024-06-21 16:47:24,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-21 16:47:24,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 193 transitions, 2098 flow [2024-06-21 16:47:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:47:24,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 16:47:24,314 INFO L175 Difference]: Start difference. First operand has 150 places, 165 transitions, 1479 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:47:24,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 193 transitions, 2098 flow [2024-06-21 16:47:24,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 193 transitions, 2031 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:24,419 INFO L231 Difference]: Finished difference. Result has 154 places, 173 transitions, 1607 flow [2024-06-21 16:47:24,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1607, PETRI_PLACES=154, PETRI_TRANSITIONS=173} [2024-06-21 16:47:24,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 16:47:24,421 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 173 transitions, 1607 flow [2024-06-21 16:47:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:24,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:24,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:24,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:47:24,422 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:24,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1362451713, now seen corresponding path program 1 times [2024-06-21 16:47:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421024013] [2024-06-21 16:47:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:24,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:25,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:25,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421024013] [2024-06-21 16:47:25,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421024013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:25,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:25,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145231695] [2024-06-21 16:47:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:25,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 173 transitions, 1607 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:25,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:25,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:25,771 INFO L124 PetriNetUnfolderBase]: 2025/3331 cut-off events. [2024-06-21 16:47:25,771 INFO L125 PetriNetUnfolderBase]: For 142398/142422 co-relation queries the response was YES. [2024-06-21 16:47:25,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22779 conditions, 3331 events. 2025/3331 cut-off events. For 142398/142422 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19238 event pairs, 586 based on Foata normal form. 13/3311 useless extension candidates. Maximal degree in co-relation 22712. Up to 3012 conditions per place. [2024-06-21 16:47:25,796 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 29 changer transitions 0/192 dead transitions. [2024-06-21 16:47:25,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 192 transitions, 2037 flow [2024-06-21 16:47:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:47:25,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:47:25,800 INFO L175 Difference]: Start difference. First operand has 154 places, 173 transitions, 1607 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:47:25,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 192 transitions, 2037 flow [2024-06-21 16:47:25,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 192 transitions, 1963 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 16:47:25,877 INFO L231 Difference]: Finished difference. Result has 159 places, 176 transitions, 1643 flow [2024-06-21 16:47:25,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1643, PETRI_PLACES=159, PETRI_TRANSITIONS=176} [2024-06-21 16:47:25,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 16:47:25,884 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 176 transitions, 1643 flow [2024-06-21 16:47:25,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:25,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:25,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:25,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:47:25,885 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:25,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1898069999, now seen corresponding path program 3 times [2024-06-21 16:47:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:25,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697902150] [2024-06-21 16:47:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:26,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:26,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697902150] [2024-06-21 16:47:26,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697902150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:26,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638610712] [2024-06-21 16:47:26,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:26,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:26,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 176 transitions, 1643 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:26,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:26,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:26,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:27,145 INFO L124 PetriNetUnfolderBase]: 2107/3465 cut-off events. [2024-06-21 16:47:27,146 INFO L125 PetriNetUnfolderBase]: For 150167/150185 co-relation queries the response was YES. [2024-06-21 16:47:27,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23911 conditions, 3465 events. 2107/3465 cut-off events. For 150167/150185 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20024 event pairs, 588 based on Foata normal form. 10/3464 useless extension candidates. Maximal degree in co-relation 23842. Up to 3143 conditions per place. [2024-06-21 16:47:27,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 22 changer transitions 0/196 dead transitions. [2024-06-21 16:47:27,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2088 flow [2024-06-21 16:47:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:47:27,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 16:47:27,174 INFO L175 Difference]: Start difference. First operand has 159 places, 176 transitions, 1643 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:47:27,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2088 flow [2024-06-21 16:47:27,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 1970 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:27,292 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1588 flow [2024-06-21 16:47:27,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1588, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-21 16:47:27,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 16:47:27,293 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1588 flow [2024-06-21 16:47:27,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:27,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:27,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:27,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:47:27,293 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:27,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 92040091, now seen corresponding path program 4 times [2024-06-21 16:47:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:27,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774942336] [2024-06-21 16:47:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:27,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:27,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774942336] [2024-06-21 16:47:27,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774942336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:27,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:27,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232926484] [2024-06-21 16:47:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:28,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:28,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1588 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:28,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:28,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:28,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:28,590 INFO L124 PetriNetUnfolderBase]: 2122/3486 cut-off events. [2024-06-21 16:47:28,591 INFO L125 PetriNetUnfolderBase]: For 157314/157332 co-relation queries the response was YES. [2024-06-21 16:47:28,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24183 conditions, 3486 events. 2122/3486 cut-off events. For 157314/157332 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20194 event pairs, 586 based on Foata normal form. 10/3480 useless extension candidates. Maximal degree in co-relation 24113. Up to 3144 conditions per place. [2024-06-21 16:47:28,619 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 30 changer transitions 0/197 dead transitions. [2024-06-21 16:47:28,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 197 transitions, 2078 flow [2024-06-21 16:47:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:47:28,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:47:28,620 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1588 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:47:28,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 197 transitions, 2078 flow [2024-06-21 16:47:28,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 197 transitions, 2004 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:28,716 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1642 flow [2024-06-21 16:47:28,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1642, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-21 16:47:28,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 16:47:28,717 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1642 flow [2024-06-21 16:47:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:28,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:28,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:28,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:47:28,717 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:28,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:28,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1010128121, now seen corresponding path program 5 times [2024-06-21 16:47:28,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:28,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053572110] [2024-06-21 16:47:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:29,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053572110] [2024-06-21 16:47:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053572110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526106262] [2024-06-21 16:47:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:29,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:29,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1642 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:29,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:29,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:29,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:29,940 INFO L124 PetriNetUnfolderBase]: 2138/3515 cut-off events. [2024-06-21 16:47:29,940 INFO L125 PetriNetUnfolderBase]: For 167280/167303 co-relation queries the response was YES. [2024-06-21 16:47:29,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24949 conditions, 3515 events. 2138/3515 cut-off events. For 167280/167303 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20438 event pairs, 594 based on Foata normal form. 12/3509 useless extension candidates. Maximal degree in co-relation 24878. Up to 3129 conditions per place. [2024-06-21 16:47:29,969 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 146 selfloop transitions, 45 changer transitions 0/204 dead transitions. [2024-06-21 16:47:29,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 204 transitions, 2307 flow [2024-06-21 16:47:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:47:29,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 16:47:29,971 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1642 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:47:29,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 204 transitions, 2307 flow [2024-06-21 16:47:30,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 204 transitions, 2201 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:30,099 INFO L231 Difference]: Finished difference. Result has 163 places, 188 transitions, 1788 flow [2024-06-21 16:47:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=163, PETRI_TRANSITIONS=188} [2024-06-21 16:47:30,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 16:47:30,100 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 188 transitions, 1788 flow [2024-06-21 16:47:30,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:30,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:30,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:30,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:47:30,101 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:30,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1450901605, now seen corresponding path program 6 times [2024-06-21 16:47:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:30,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925678294] [2024-06-21 16:47:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:30,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:30,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925678294] [2024-06-21 16:47:30,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925678294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:30,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:47:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428827399] [2024-06-21 16:47:30,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:30,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:47:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:47:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:47:30,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:30,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 188 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:30,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:30,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:30,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:31,246 INFO L124 PetriNetUnfolderBase]: 2134/3514 cut-off events. [2024-06-21 16:47:31,246 INFO L125 PetriNetUnfolderBase]: For 174684/174699 co-relation queries the response was YES. [2024-06-21 16:47:31,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 3514 events. 2134/3514 cut-off events. For 174684/174699 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20421 event pairs, 596 based on Foata normal form. 12/3513 useless extension candidates. Maximal degree in co-relation 25262. Up to 3128 conditions per place. [2024-06-21 16:47:31,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 46 changer transitions 0/204 dead transitions. [2024-06-21 16:47:31,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 204 transitions, 2253 flow [2024-06-21 16:47:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:47:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:47:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:47:31,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:47:31,277 INFO L175 Difference]: Start difference. First operand has 163 places, 188 transitions, 1788 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:47:31,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 204 transitions, 2253 flow [2024-06-21 16:47:31,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 204 transitions, 2069 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:31,411 INFO L231 Difference]: Finished difference. Result has 166 places, 189 transitions, 1721 flow [2024-06-21 16:47:31,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=166, PETRI_TRANSITIONS=189} [2024-06-21 16:47:31,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 16:47:31,412 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 189 transitions, 1721 flow [2024-06-21 16:47:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 16:47:31,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:31,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:31,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:47:31,413 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:31,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash -996787705, now seen corresponding path program 2 times [2024-06-21 16:47:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:31,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610529307] [2024-06-21 16:47:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:31,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:32,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:32,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610529307] [2024-06-21 16:47:32,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610529307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:32,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:32,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:32,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484069770] [2024-06-21 16:47:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:32,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:32,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:32,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 1721 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:32,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:32,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:32,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:32,795 INFO L124 PetriNetUnfolderBase]: 2058/3374 cut-off events. [2024-06-21 16:47:32,795 INFO L125 PetriNetUnfolderBase]: For 174272/174280 co-relation queries the response was YES. [2024-06-21 16:47:32,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24244 conditions, 3374 events. 2058/3374 cut-off events. For 174272/174280 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19472 event pairs, 593 based on Foata normal form. 7/3334 useless extension candidates. Maximal degree in co-relation 24170. Up to 3017 conditions per place. [2024-06-21 16:47:32,828 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2024-06-21 16:47:32,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 209 transitions, 2307 flow [2024-06-21 16:47:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:47:32,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 16:47:32,832 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 1721 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:47:32,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 209 transitions, 2307 flow [2024-06-21 16:47:32,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2236 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:32,941 INFO L231 Difference]: Finished difference. Result has 171 places, 197 transitions, 1880 flow [2024-06-21 16:47:32,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1880, PETRI_PLACES=171, PETRI_TRANSITIONS=197} [2024-06-21 16:47:32,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 16:47:32,943 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 197 transitions, 1880 flow [2024-06-21 16:47:32,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:32,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:32,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:32,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:47:32,944 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:32,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1010120185, now seen corresponding path program 3 times [2024-06-21 16:47:32,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:32,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515400523] [2024-06-21 16:47:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:33,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:33,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515400523] [2024-06-21 16:47:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515400523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:33,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:33,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:33,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797364499] [2024-06-21 16:47:33,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:33,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:33,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:33,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:33,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 197 transitions, 1880 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:33,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:33,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:33,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:34,364 INFO L124 PetriNetUnfolderBase]: 2053/3372 cut-off events. [2024-06-21 16:47:34,365 INFO L125 PetriNetUnfolderBase]: For 183640/183668 co-relation queries the response was YES. [2024-06-21 16:47:34,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24781 conditions, 3372 events. 2053/3372 cut-off events. For 183640/183668 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19547 event pairs, 594 based on Foata normal form. 10/3334 useless extension candidates. Maximal degree in co-relation 24705. Up to 3015 conditions per place. [2024-06-21 16:47:34,397 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-21 16:47:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 213 transitions, 2438 flow [2024-06-21 16:47:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:47:34,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:47:34,399 INFO L175 Difference]: Start difference. First operand has 171 places, 197 transitions, 1880 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:47:34,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 213 transitions, 2438 flow [2024-06-21 16:47:34,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 213 transitions, 2334 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:34,554 INFO L231 Difference]: Finished difference. Result has 175 places, 201 transitions, 1946 flow [2024-06-21 16:47:34,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1946, PETRI_PLACES=175, PETRI_TRANSITIONS=201} [2024-06-21 16:47:34,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 16:47:34,559 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 201 transitions, 1946 flow [2024-06-21 16:47:34,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:34,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:34,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:34,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:47:34,560 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)] === [2024-06-21 16:47:34,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash -997233175, now seen corresponding path program 4 times [2024-06-21 16:47:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:34,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268219881] [2024-06-21 16:47:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:34,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:35,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:35,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268219881] [2024-06-21 16:47:35,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268219881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:35,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:35,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:35,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860764592] [2024-06-21 16:47:35,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:35,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:35,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 201 transitions, 1946 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:35,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:35,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:35,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:35,990 INFO L124 PetriNetUnfolderBase]: 2057/3373 cut-off events. [2024-06-21 16:47:35,990 INFO L125 PetriNetUnfolderBase]: For 188586/188604 co-relation queries the response was YES. [2024-06-21 16:47:36,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24951 conditions, 3373 events. 2057/3373 cut-off events. For 188586/188604 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19461 event pairs, 593 based on Foata normal form. 10/3336 useless extension candidates. Maximal degree in co-relation 24873. Up to 3018 conditions per place. [2024-06-21 16:47:36,020 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-21 16:47:36,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 212 transitions, 2350 flow [2024-06-21 16:47:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:36,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:47:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 16:47:36,022 INFO L175 Difference]: Start difference. First operand has 175 places, 201 transitions, 1946 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:47:36,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 212 transitions, 2350 flow [2024-06-21 16:47:36,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 212 transitions, 2221 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:36,143 INFO L231 Difference]: Finished difference. Result has 179 places, 201 transitions, 1929 flow [2024-06-21 16:47:36,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1929, PETRI_PLACES=179, PETRI_TRANSITIONS=201} [2024-06-21 16:47:36,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 16:47:36,144 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 201 transitions, 1929 flow [2024-06-21 16:47:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:36,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:36,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:47:36,148 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)] === [2024-06-21 16:47:36,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash 99428662, now seen corresponding path program 1 times [2024-06-21 16:47:36,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:36,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406116966] [2024-06-21 16:47:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:36,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406116966] [2024-06-21 16:47:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406116966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877958349] [2024-06-21 16:47:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:36,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:36,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 201 transitions, 1929 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:36,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:36,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:36,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:37,617 INFO L124 PetriNetUnfolderBase]: 2128/3501 cut-off events. [2024-06-21 16:47:37,617 INFO L125 PetriNetUnfolderBase]: For 194519/194521 co-relation queries the response was YES. [2024-06-21 16:47:37,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25576 conditions, 3501 events. 2128/3501 cut-off events. For 194519/194521 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20210 event pairs, 593 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 25497. Up to 3215 conditions per place. [2024-06-21 16:47:37,649 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 17 changer transitions 0/221 dead transitions. [2024-06-21 16:47:37,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 221 transitions, 2461 flow [2024-06-21 16:47:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:47:37,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:47:37,651 INFO L175 Difference]: Start difference. First operand has 179 places, 201 transitions, 1929 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:47:37,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 221 transitions, 2461 flow [2024-06-21 16:47:37,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 221 transitions, 2363 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:37,880 INFO L231 Difference]: Finished difference. Result has 181 places, 204 transitions, 1939 flow [2024-06-21 16:47:37,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1939, PETRI_PLACES=181, PETRI_TRANSITIONS=204} [2024-06-21 16:47:37,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 16:47:37,881 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 204 transitions, 1939 flow [2024-06-21 16:47:37,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:37,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:37,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:37,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:47:37,881 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)] === [2024-06-21 16:47:37,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:37,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2094457159, now seen corresponding path program 1 times [2024-06-21 16:47:37,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511813840] [2024-06-21 16:47:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:38,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:38,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511813840] [2024-06-21 16:47:38,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511813840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:38,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:38,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111985237] [2024-06-21 16:47:38,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:38,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:38,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:38,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 204 transitions, 1939 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:38,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:38,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:38,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:39,227 INFO L124 PetriNetUnfolderBase]: 2138/3519 cut-off events. [2024-06-21 16:47:39,227 INFO L125 PetriNetUnfolderBase]: For 206634/206636 co-relation queries the response was YES. [2024-06-21 16:47:39,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26072 conditions, 3519 events. 2138/3519 cut-off events. For 206634/206636 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20425 event pairs, 586 based on Foata normal form. 4/3521 useless extension candidates. Maximal degree in co-relation 25992. Up to 3222 conditions per place. [2024-06-21 16:47:39,259 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 17 changer transitions 0/224 dead transitions. [2024-06-21 16:47:39,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 224 transitions, 2487 flow [2024-06-21 16:47:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:47:39,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:47:39,260 INFO L175 Difference]: Start difference. First operand has 181 places, 204 transitions, 1939 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:47:39,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 224 transitions, 2487 flow [2024-06-21 16:47:39,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 2401 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:39,467 INFO L231 Difference]: Finished difference. Result has 183 places, 207 transitions, 1957 flow [2024-06-21 16:47:39,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1957, PETRI_PLACES=183, PETRI_TRANSITIONS=207} [2024-06-21 16:47:39,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 16:47:39,468 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 207 transitions, 1957 flow [2024-06-21 16:47:39,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:39,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:39,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:39,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:47:39,469 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)] === [2024-06-21 16:47:39,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1004400313, now seen corresponding path program 2 times [2024-06-21 16:47:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:39,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072637447] [2024-06-21 16:47:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:39,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:40,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:40,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072637447] [2024-06-21 16:47:40,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072637447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:40,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:40,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161592799] [2024-06-21 16:47:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:40,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:40,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 207 transitions, 1957 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:40,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:40,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:40,745 INFO L124 PetriNetUnfolderBase]: 2159/3557 cut-off events. [2024-06-21 16:47:40,746 INFO L125 PetriNetUnfolderBase]: For 218678/218683 co-relation queries the response was YES. [2024-06-21 16:47:40,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3557 events. 2159/3557 cut-off events. For 218678/218683 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20694 event pairs, 595 based on Foata normal form. 6/3560 useless extension candidates. Maximal degree in co-relation 26812. Up to 3195 conditions per place. [2024-06-21 16:47:40,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 37 changer transitions 0/229 dead transitions. [2024-06-21 16:47:40,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 229 transitions, 2681 flow [2024-06-21 16:47:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:47:40,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:47:40,785 INFO L175 Difference]: Start difference. First operand has 183 places, 207 transitions, 1957 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:47:40,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 229 transitions, 2681 flow [2024-06-21 16:47:40,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 229 transitions, 2599 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:40,990 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2089 flow [2024-06-21 16:47:40,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2089, PETRI_PLACES=185, PETRI_TRANSITIONS=213} [2024-06-21 16:47:40,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 16:47:40,991 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2089 flow [2024-06-21 16:47:40,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:40,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:40,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:40,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:47:40,992 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)] === [2024-06-21 16:47:40,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1458267143, now seen corresponding path program 3 times [2024-06-21 16:47:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:40,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173907945] [2024-06-21 16:47:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:40,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173907945] [2024-06-21 16:47:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173907945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:41,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:41,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032611211] [2024-06-21 16:47:41,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:41,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:41,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:41,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 213 transitions, 2089 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:41,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:41,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:41,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:42,469 INFO L124 PetriNetUnfolderBase]: 2167/3573 cut-off events. [2024-06-21 16:47:42,469 INFO L125 PetriNetUnfolderBase]: For 229748/229753 co-relation queries the response was YES. [2024-06-21 16:47:42,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27465 conditions, 3573 events. 2167/3573 cut-off events. For 229748/229753 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20868 event pairs, 589 based on Foata normal form. 6/3573 useless extension candidates. Maximal degree in co-relation 27383. Up to 3203 conditions per place. [2024-06-21 16:47:42,500 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 41 changer transitions 0/232 dead transitions. [2024-06-21 16:47:42,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2763 flow [2024-06-21 16:47:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:47:42,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 16:47:42,501 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2089 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:47:42,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2763 flow [2024-06-21 16:47:42,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 232 transitions, 2667 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:42,725 INFO L231 Difference]: Finished difference. Result has 189 places, 216 transitions, 2151 flow [2024-06-21 16:47:42,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2151, PETRI_PLACES=189, PETRI_TRANSITIONS=216} [2024-06-21 16:47:42,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 16:47:42,725 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 216 transitions, 2151 flow [2024-06-21 16:47:42,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:42,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:42,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:42,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:47:42,731 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)] === [2024-06-21 16:47:42,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:42,731 INFO L85 PathProgramCache]: Analyzing trace with hash -997041223, now seen corresponding path program 4 times [2024-06-21 16:47:42,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:42,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522753909] [2024-06-21 16:47:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:42,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522753909] [2024-06-21 16:47:43,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522753909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:43,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:43,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:43,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279826591] [2024-06-21 16:47:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:43,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:43,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:43,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:43,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 216 transitions, 2151 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:43,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:43,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:43,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:44,212 INFO L124 PetriNetUnfolderBase]: 2165/3571 cut-off events. [2024-06-21 16:47:44,212 INFO L125 PetriNetUnfolderBase]: For 232747/232752 co-relation queries the response was YES. [2024-06-21 16:47:44,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27474 conditions, 3571 events. 2165/3571 cut-off events. For 232747/232752 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20834 event pairs, 585 based on Foata normal form. 6/3574 useless extension candidates. Maximal degree in co-relation 27390. Up to 3203 conditions per place. [2024-06-21 16:47:44,240 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-21 16:47:44,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 231 transitions, 2653 flow [2024-06-21 16:47:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:47:44,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 16:47:44,241 INFO L175 Difference]: Start difference. First operand has 189 places, 216 transitions, 2151 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:47:44,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 231 transitions, 2653 flow [2024-06-21 16:47:44,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 231 transitions, 2465 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:44,494 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2056 flow [2024-06-21 16:47:44,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2056, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2024-06-21 16:47:44,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 16:47:44,494 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2056 flow [2024-06-21 16:47:44,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:44,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:44,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:44,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:47:44,495 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)] === [2024-06-21 16:47:44,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:44,495 INFO L85 PathProgramCache]: Analyzing trace with hash -996771833, now seen corresponding path program 1 times [2024-06-21 16:47:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:44,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582854930] [2024-06-21 16:47:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:45,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:45,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582854930] [2024-06-21 16:47:45,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582854930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:45,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:45,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:45,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815446394] [2024-06-21 16:47:45,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:45,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:45,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:45,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2056 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:45,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:45,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:45,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:46,157 INFO L124 PetriNetUnfolderBase]: 2110/3462 cut-off events. [2024-06-21 16:47:46,158 INFO L125 PetriNetUnfolderBase]: For 234102/234116 co-relation queries the response was YES. [2024-06-21 16:47:46,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26896 conditions, 3462 events. 2110/3462 cut-off events. For 234102/234116 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20107 event pairs, 602 based on Foata normal form. 9/3439 useless extension candidates. Maximal degree in co-relation 26811. Up to 3169 conditions per place. [2024-06-21 16:47:46,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 20 changer transitions 0/231 dead transitions. [2024-06-21 16:47:46,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 231 transitions, 2558 flow [2024-06-21 16:47:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:47:46,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 16:47:46,187 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2056 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:47:46,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 231 transitions, 2558 flow [2024-06-21 16:47:46,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 231 transitions, 2464 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:46,408 INFO L231 Difference]: Finished difference. Result has 193 places, 219 transitions, 2072 flow [2024-06-21 16:47:46,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2072, PETRI_PLACES=193, PETRI_TRANSITIONS=219} [2024-06-21 16:47:46,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 16:47:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 219 transitions, 2072 flow [2024-06-21 16:47:46,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:46,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:46,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:46,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:47:46,409 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)] === [2024-06-21 16:47:46,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1605821663, now seen corresponding path program 1 times [2024-06-21 16:47:46,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:46,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259615482] [2024-06-21 16:47:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:46,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:47,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:47,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259615482] [2024-06-21 16:47:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259615482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:47,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:47,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826571932] [2024-06-21 16:47:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:47,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:47,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 219 transitions, 2072 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:47,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:47,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:47,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:47,752 INFO L124 PetriNetUnfolderBase]: 2200/3587 cut-off events. [2024-06-21 16:47:47,752 INFO L125 PetriNetUnfolderBase]: For 246092/246096 co-relation queries the response was YES. [2024-06-21 16:47:47,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28008 conditions, 3587 events. 2200/3587 cut-off events. For 246092/246096 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20607 event pairs, 472 based on Foata normal form. 6/3583 useless extension candidates. Maximal degree in co-relation 27922. Up to 3233 conditions per place. [2024-06-21 16:47:47,787 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 24 changer transitions 0/249 dead transitions. [2024-06-21 16:47:47,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2678 flow [2024-06-21 16:47:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:47:47,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 16:47:47,788 INFO L175 Difference]: Start difference. First operand has 193 places, 219 transitions, 2072 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:47:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2678 flow [2024-06-21 16:47:48,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 249 transitions, 2513 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:48,046 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 2012 flow [2024-06-21 16:47:48,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2012, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-06-21 16:47:48,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 16:47:48,047 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 2012 flow [2024-06-21 16:47:48,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:48,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:48,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:48,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:47:48,047 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)] === [2024-06-21 16:47:48,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash 426414823, now seen corresponding path program 2 times [2024-06-21 16:47:48,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:48,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110525613] [2024-06-21 16:47:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:48,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:48,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110525613] [2024-06-21 16:47:48,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110525613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:48,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:48,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434065502] [2024-06-21 16:47:48,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:48,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:48,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:48,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 2012 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:48,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:48,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:49,588 INFO L124 PetriNetUnfolderBase]: 2213/3623 cut-off events. [2024-06-21 16:47:49,589 INFO L125 PetriNetUnfolderBase]: For 254572/254576 co-relation queries the response was YES. [2024-06-21 16:47:49,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28410 conditions, 3623 events. 2213/3623 cut-off events. For 254572/254576 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21114 event pairs, 586 based on Foata normal form. 6/3619 useless extension candidates. Maximal degree in co-relation 28324. Up to 3289 conditions per place. [2024-06-21 16:47:49,622 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 25 changer transitions 0/250 dead transitions. [2024-06-21 16:47:49,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 250 transitions, 2634 flow [2024-06-21 16:47:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:47:49,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:47:49,624 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 2012 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:47:49,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 250 transitions, 2634 flow [2024-06-21 16:47:49,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 250 transitions, 2545 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:49,867 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 2068 flow [2024-06-21 16:47:49,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2068, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-21 16:47:49,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 16:47:49,868 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 2068 flow [2024-06-21 16:47:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:49,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:49,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:49,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:47:49,868 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)] === [2024-06-21 16:47:49,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1551253413, now seen corresponding path program 1 times [2024-06-21 16:47:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120965096] [2024-06-21 16:47:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:50,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:50,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120965096] [2024-06-21 16:47:50,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120965096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:50,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:50,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098126912] [2024-06-21 16:47:50,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:50,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:50,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:50,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:50,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 2068 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:50,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:50,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:50,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:51,211 INFO L124 PetriNetUnfolderBase]: 2223/3639 cut-off events. [2024-06-21 16:47:51,211 INFO L125 PetriNetUnfolderBase]: For 264365/264369 co-relation queries the response was YES. [2024-06-21 16:47:51,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28772 conditions, 3639 events. 2223/3639 cut-off events. For 264365/264369 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21166 event pairs, 585 based on Foata normal form. 6/3635 useless extension candidates. Maximal degree in co-relation 28684. Up to 3285 conditions per place. [2024-06-21 16:47:51,248 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 215 selfloop transitions, 28 changer transitions 0/257 dead transitions. [2024-06-21 16:47:51,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 257 transitions, 2730 flow [2024-06-21 16:47:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:47:51,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:47:51,249 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 2068 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:47:51,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 257 transitions, 2730 flow [2024-06-21 16:47:51,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 257 transitions, 2637 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:51,549 INFO L231 Difference]: Finished difference. Result has 198 places, 230 transitions, 2138 flow [2024-06-21 16:47:51,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2138, PETRI_PLACES=198, PETRI_TRANSITIONS=230} [2024-06-21 16:47:51,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 16:47:51,550 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 230 transitions, 2138 flow [2024-06-21 16:47:51,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:51,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:51,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:51,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:47:51,551 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:51,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:51,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1545539493, now seen corresponding path program 2 times [2024-06-21 16:47:51,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:51,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100314041] [2024-06-21 16:47:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:52,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:52,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100314041] [2024-06-21 16:47:52,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100314041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:52,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:52,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505664030] [2024-06-21 16:47:52,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:52,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:52,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:52,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:52,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 230 transitions, 2138 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:52,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:52,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:52,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:52,798 INFO L124 PetriNetUnfolderBase]: 2233/3655 cut-off events. [2024-06-21 16:47:52,798 INFO L125 PetriNetUnfolderBase]: For 276402/276406 co-relation queries the response was YES. [2024-06-21 16:47:52,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29466 conditions, 3655 events. 2233/3655 cut-off events. For 276402/276406 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21259 event pairs, 585 based on Foata normal form. 6/3651 useless extension candidates. Maximal degree in co-relation 29376. Up to 3286 conditions per place. [2024-06-21 16:47:52,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 34 changer transitions 0/262 dead transitions. [2024-06-21 16:47:52,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 262 transitions, 2818 flow [2024-06-21 16:47:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:47:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 16:47:52,835 INFO L175 Difference]: Start difference. First operand has 198 places, 230 transitions, 2138 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:47:52,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 262 transitions, 2818 flow [2024-06-21 16:47:53,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 262 transitions, 2703 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:53,178 INFO L231 Difference]: Finished difference. Result has 202 places, 233 transitions, 2185 flow [2024-06-21 16:47:53,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2185, PETRI_PLACES=202, PETRI_TRANSITIONS=233} [2024-06-21 16:47:53,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 16:47:53,178 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 233 transitions, 2185 flow [2024-06-21 16:47:53,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:53,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:53,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:53,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:47:53,179 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:53,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1901279873, now seen corresponding path program 3 times [2024-06-21 16:47:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:53,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659402278] [2024-06-21 16:47:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:53,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659402278] [2024-06-21 16:47:53,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659402278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:53,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:53,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560907534] [2024-06-21 16:47:53,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:53,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:53,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:54,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:54,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 233 transitions, 2185 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:54,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:54,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:54,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:54,672 INFO L124 PetriNetUnfolderBase]: 2241/3665 cut-off events. [2024-06-21 16:47:54,672 INFO L125 PetriNetUnfolderBase]: For 289386/289388 co-relation queries the response was YES. [2024-06-21 16:47:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30095 conditions, 3665 events. 2241/3665 cut-off events. For 289386/289388 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21320 event pairs, 589 based on Foata normal form. 2/3657 useless extension candidates. Maximal degree in co-relation 30004. Up to 3321 conditions per place. [2024-06-21 16:47:54,708 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-21 16:47:54,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 252 transitions, 2769 flow [2024-06-21 16:47:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:47:54,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 16:47:54,709 INFO L175 Difference]: Start difference. First operand has 202 places, 233 transitions, 2185 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:47:54,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 252 transitions, 2769 flow [2024-06-21 16:47:54,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 252 transitions, 2629 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:54,989 INFO L231 Difference]: Finished difference. Result has 203 places, 235 transitions, 2172 flow [2024-06-21 16:47:54,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2172, PETRI_PLACES=203, PETRI_TRANSITIONS=235} [2024-06-21 16:47:54,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 16:47:54,990 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 235 transitions, 2172 flow [2024-06-21 16:47:54,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:54,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:54,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:54,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:47:54,990 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)] === [2024-06-21 16:47:54,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1723972769, now seen corresponding path program 3 times [2024-06-21 16:47:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503903001] [2024-06-21 16:47:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:55,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:55,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503903001] [2024-06-21 16:47:55,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503903001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:55,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:55,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000713683] [2024-06-21 16:47:55,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:55,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:55,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 235 transitions, 2172 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:55,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:55,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:55,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:56,561 INFO L124 PetriNetUnfolderBase]: 2251/3684 cut-off events. [2024-06-21 16:47:56,561 INFO L125 PetriNetUnfolderBase]: For 298944/298949 co-relation queries the response was YES. [2024-06-21 16:47:56,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30407 conditions, 3684 events. 2251/3684 cut-off events. For 298944/298949 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21508 event pairs, 593 based on Foata normal form. 4/3677 useless extension candidates. Maximal degree in co-relation 30315. Up to 3277 conditions per place. [2024-06-21 16:47:56,595 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 39 changer transitions 0/261 dead transitions. [2024-06-21 16:47:56,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 261 transitions, 2830 flow [2024-06-21 16:47:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:47:56,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 16:47:56,596 INFO L175 Difference]: Start difference. First operand has 203 places, 235 transitions, 2172 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:47:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 261 transitions, 2830 flow [2024-06-21 16:47:56,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 2688 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:56,879 INFO L231 Difference]: Finished difference. Result has 204 places, 238 transitions, 2210 flow [2024-06-21 16:47:56,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=204, PETRI_TRANSITIONS=238} [2024-06-21 16:47:56,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 16:47:56,880 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 238 transitions, 2210 flow [2024-06-21 16:47:56,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:56,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:56,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:47:56,880 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:56,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1724151515, now seen corresponding path program 1 times [2024-06-21 16:47:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:56,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130912769] [2024-06-21 16:47:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130912769] [2024-06-21 16:47:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130912769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:57,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724350870] [2024-06-21 16:47:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:57,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:47:57,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 238 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:57,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:57,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:47:57,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:58,528 INFO L124 PetriNetUnfolderBase]: 2256/3692 cut-off events. [2024-06-21 16:47:58,528 INFO L125 PetriNetUnfolderBase]: For 309897/309904 co-relation queries the response was YES. [2024-06-21 16:47:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30984 conditions, 3692 events. 2256/3692 cut-off events. For 309897/309904 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21532 event pairs, 592 based on Foata normal form. 5/3685 useless extension candidates. Maximal degree in co-relation 30893. Up to 3323 conditions per place. [2024-06-21 16:47:58,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 219 selfloop transitions, 32 changer transitions 0/265 dead transitions. [2024-06-21 16:47:58,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 265 transitions, 2876 flow [2024-06-21 16:47:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:47:58,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:47:58,571 INFO L175 Difference]: Start difference. First operand has 204 places, 238 transitions, 2210 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:47:58,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 265 transitions, 2876 flow [2024-06-21 16:47:58,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 265 transitions, 2715 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:58,892 INFO L231 Difference]: Finished difference. Result has 206 places, 241 transitions, 2211 flow [2024-06-21 16:47:58,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2211, PETRI_PLACES=206, PETRI_TRANSITIONS=241} [2024-06-21 16:47:58,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 16:47:58,893 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 241 transitions, 2211 flow [2024-06-21 16:47:58,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:47:58,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:58,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:58,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:47:58,894 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:58,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1724271671, now seen corresponding path program 1 times [2024-06-21 16:47:58,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:58,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544279451] [2024-06-21 16:47:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544279451] [2024-06-21 16:47:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544279451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:59,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:59,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142765402] [2024-06-21 16:47:59,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:59,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:59,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:59,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:47:59,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 241 transitions, 2211 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:47:59,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:59,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:47:59,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:00,110 INFO L124 PetriNetUnfolderBase]: 2348/3791 cut-off events. [2024-06-21 16:48:00,110 INFO L125 PetriNetUnfolderBase]: For 321917/321924 co-relation queries the response was YES. [2024-06-21 16:48:00,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3791 events. 2348/3791 cut-off events. For 321917/321924 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21705 event pairs, 619 based on Foata normal form. 8/3796 useless extension candidates. Maximal degree in co-relation 31725. Up to 3532 conditions per place. [2024-06-21 16:48:00,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-21 16:48:00,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 267 transitions, 2891 flow [2024-06-21 16:48:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:48:00,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:48:00,148 INFO L175 Difference]: Start difference. First operand has 206 places, 241 transitions, 2211 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:48:00,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 267 transitions, 2891 flow [2024-06-21 16:48:00,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 267 transitions, 2751 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:00,467 INFO L231 Difference]: Finished difference. Result has 208 places, 244 transitions, 2205 flow [2024-06-21 16:48:00,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2205, PETRI_PLACES=208, PETRI_TRANSITIONS=244} [2024-06-21 16:48:00,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 16:48:00,468 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 244 transitions, 2205 flow [2024-06-21 16:48:00,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:00,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:00,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:48:00,468 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:00,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1063184415, now seen corresponding path program 4 times [2024-06-21 16:48:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:00,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834690946] [2024-06-21 16:48:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:00,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:01,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:01,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834690946] [2024-06-21 16:48:01,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834690946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:01,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:01,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:01,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649581489] [2024-06-21 16:48:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:01,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:01,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:01,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:01,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 244 transitions, 2205 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:01,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:01,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:01,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:01,871 INFO L124 PetriNetUnfolderBase]: 2289/3738 cut-off events. [2024-06-21 16:48:01,872 INFO L125 PetriNetUnfolderBase]: For 339061/339078 co-relation queries the response was YES. [2024-06-21 16:48:01,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32186 conditions, 3738 events. 2289/3738 cut-off events. For 339061/339078 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21768 event pairs, 591 based on Foata normal form. 4/3726 useless extension candidates. Maximal degree in co-relation 32094. Up to 3301 conditions per place. [2024-06-21 16:48:01,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2024-06-21 16:48:01,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 2885 flow [2024-06-21 16:48:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:48:01,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:48:01,914 INFO L175 Difference]: Start difference. First operand has 208 places, 244 transitions, 2205 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:48:01,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 2885 flow [2024-06-21 16:48:02,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 268 transitions, 2773 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:02,266 INFO L231 Difference]: Finished difference. Result has 210 places, 247 transitions, 2301 flow [2024-06-21 16:48:02,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2301, PETRI_PLACES=210, PETRI_TRANSITIONS=247} [2024-06-21 16:48:02,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 16:48:02,267 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 247 transitions, 2301 flow [2024-06-21 16:48:02,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:02,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:02,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:02,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:48:02,268 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)] === [2024-06-21 16:48:02,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1901640341, now seen corresponding path program 2 times [2024-06-21 16:48:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:02,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030225186] [2024-06-21 16:48:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:02,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:02,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:02,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030225186] [2024-06-21 16:48:02,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030225186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:02,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:02,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:02,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192742266] [2024-06-21 16:48:02,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:02,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:02,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:02,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:03,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:03,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 247 transitions, 2301 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:03,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:03,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:03,667 INFO L124 PetriNetUnfolderBase]: 2384/3847 cut-off events. [2024-06-21 16:48:03,668 INFO L125 PetriNetUnfolderBase]: For 354757/354764 co-relation queries the response was YES. [2024-06-21 16:48:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 3847 events. 2384/3847 cut-off events. For 354757/354764 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22085 event pairs, 619 based on Foata normal form. 8/3852 useless extension candidates. Maximal degree in co-relation 33376. Up to 3541 conditions per place. [2024-06-21 16:48:03,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-21 16:48:03,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 277 transitions, 3224 flow [2024-06-21 16:48:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:48:03,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:48:03,708 INFO L175 Difference]: Start difference. First operand has 210 places, 247 transitions, 2301 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:48:03,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 277 transitions, 3224 flow [2024-06-21 16:48:04,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 277 transitions, 3038 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:04,044 INFO L231 Difference]: Finished difference. Result has 213 places, 255 transitions, 2394 flow [2024-06-21 16:48:04,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2394, PETRI_PLACES=213, PETRI_TRANSITIONS=255} [2024-06-21 16:48:04,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 16:48:04,045 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 255 transitions, 2394 flow [2024-06-21 16:48:04,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:04,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:04,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:48:04,046 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)] === [2024-06-21 16:48:04,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1901403191, now seen corresponding path program 3 times [2024-06-21 16:48:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60713481] [2024-06-21 16:48:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:04,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:04,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60713481] [2024-06-21 16:48:04,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60713481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:04,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:04,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:04,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742314335] [2024-06-21 16:48:04,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:04,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:04,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:04,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:04,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:04,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:04,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 255 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:04,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:04,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:04,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:05,513 INFO L124 PetriNetUnfolderBase]: 2394/3861 cut-off events. [2024-06-21 16:48:05,520 INFO L125 PetriNetUnfolderBase]: For 367750/367757 co-relation queries the response was YES. [2024-06-21 16:48:05,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33991 conditions, 3861 events. 2394/3861 cut-off events. For 367750/367757 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22177 event pairs, 624 based on Foata normal form. 8/3866 useless extension candidates. Maximal degree in co-relation 33896. Up to 3551 conditions per place. [2024-06-21 16:48:05,557 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2024-06-21 16:48:05,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 3241 flow [2024-06-21 16:48:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:05,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:48:05,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 16:48:05,559 INFO L175 Difference]: Start difference. First operand has 213 places, 255 transitions, 2394 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:48:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 3241 flow [2024-06-21 16:48:05,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3096 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:05,924 INFO L231 Difference]: Finished difference. Result has 217 places, 258 transitions, 2424 flow [2024-06-21 16:48:05,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=217, PETRI_TRANSITIONS=258} [2024-06-21 16:48:05,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 16:48:05,925 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 258 transitions, 2424 flow [2024-06-21 16:48:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:05,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:05,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:05,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:48:05,925 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)] === [2024-06-21 16:48:05,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1901402819, now seen corresponding path program 5 times [2024-06-21 16:48:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:05,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942678405] [2024-06-21 16:48:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:06,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942678405] [2024-06-21 16:48:06,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942678405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:06,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:06,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800398347] [2024-06-21 16:48:06,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:06,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:06,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 258 transitions, 2424 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:07,473 INFO L124 PetriNetUnfolderBase]: 2363/3857 cut-off events. [2024-06-21 16:48:07,473 INFO L125 PetriNetUnfolderBase]: For 392919/392926 co-relation queries the response was YES. [2024-06-21 16:48:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 3857 events. 2363/3857 cut-off events. For 392919/392926 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22677 event pairs, 599 based on Foata normal form. 6/3847 useless extension candidates. Maximal degree in co-relation 34808. Up to 3334 conditions per place. [2024-06-21 16:48:07,516 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 66 changer transitions 0/288 dead transitions. [2024-06-21 16:48:07,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 3618 flow [2024-06-21 16:48:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:48:07,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 16:48:07,521 INFO L175 Difference]: Start difference. First operand has 217 places, 258 transitions, 2424 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:48:07,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 3618 flow [2024-06-21 16:48:08,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3504 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:48:08,020 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 2784 flow [2024-06-21 16:48:08,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2784, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-06-21 16:48:08,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 16:48:08,021 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 2784 flow [2024-06-21 16:48:08,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:08,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:08,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:48:08,022 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)] === [2024-06-21 16:48:08,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1901282849, now seen corresponding path program 6 times [2024-06-21 16:48:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187451457] [2024-06-21 16:48:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187451457] [2024-06-21 16:48:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187451457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:08,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737815538] [2024-06-21 16:48:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:08,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:08,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:08,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 2784 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:08,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:08,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:08,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:09,542 INFO L124 PetriNetUnfolderBase]: 2356/3840 cut-off events. [2024-06-21 16:48:09,542 INFO L125 PetriNetUnfolderBase]: For 402410/402412 co-relation queries the response was YES. [2024-06-21 16:48:09,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35181 conditions, 3840 events. 2356/3840 cut-off events. For 402410/402412 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22473 event pairs, 599 based on Foata normal form. 2/3832 useless extension candidates. Maximal degree in co-relation 35083. Up to 3462 conditions per place. [2024-06-21 16:48:09,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 30 changer transitions 0/284 dead transitions. [2024-06-21 16:48:09,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 284 transitions, 3368 flow [2024-06-21 16:48:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:48:09,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:48:09,582 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 2784 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:48:09,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 284 transitions, 3368 flow [2024-06-21 16:48:10,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 284 transitions, 3129 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-21 16:48:10,037 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 2611 flow [2024-06-21 16:48:10,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2611, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-21 16:48:10,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 16:48:10,037 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 2611 flow [2024-06-21 16:48:10,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:10,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:10,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:48:10,038 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)] === [2024-06-21 16:48:10,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1056508875, now seen corresponding path program 1 times [2024-06-21 16:48:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781277547] [2024-06-21 16:48:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:10,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781277547] [2024-06-21 16:48:10,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781277547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:10,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:10,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251278536] [2024-06-21 16:48:10,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:10,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:10,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:10,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:10,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 2611 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:10,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:10,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:10,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:11,539 INFO L124 PetriNetUnfolderBase]: 2288/3722 cut-off events. [2024-06-21 16:48:11,539 INFO L125 PetriNetUnfolderBase]: For 400562/400578 co-relation queries the response was YES. [2024-06-21 16:48:11,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34388 conditions, 3722 events. 2288/3722 cut-off events. For 400562/400578 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21558 event pairs, 599 based on Foata normal form. 12/3694 useless extension candidates. Maximal degree in co-relation 34288. Up to 3329 conditions per place. [2024-06-21 16:48:11,578 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 37 changer transitions 0/287 dead transitions. [2024-06-21 16:48:11,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 287 transitions, 3245 flow [2024-06-21 16:48:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:48:11,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:48:11,579 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 2611 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:48:11,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 287 transitions, 3245 flow [2024-06-21 16:48:12,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 287 transitions, 3165 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:12,017 INFO L231 Difference]: Finished difference. Result has 227 places, 270 transitions, 2689 flow [2024-06-21 16:48:12,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2689, PETRI_PLACES=227, PETRI_TRANSITIONS=270} [2024-06-21 16:48:12,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 16:48:12,018 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 270 transitions, 2689 flow [2024-06-21 16:48:12,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:48:12,019 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:12,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1903454951, now seen corresponding path program 4 times [2024-06-21 16:48:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337980791] [2024-06-21 16:48:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:12,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:12,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337980791] [2024-06-21 16:48:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337980791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:12,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604363777] [2024-06-21 16:48:12,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:12,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:12,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:12,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:12,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:12,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 270 transitions, 2689 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:12,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:12,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:12,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:13,443 INFO L124 PetriNetUnfolderBase]: 2361/3848 cut-off events. [2024-06-21 16:48:13,444 INFO L125 PetriNetUnfolderBase]: For 411737/411739 co-relation queries the response was YES. [2024-06-21 16:48:13,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35533 conditions, 3848 events. 2361/3848 cut-off events. For 411737/411739 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22431 event pairs, 606 based on Foata normal form. 2/3830 useless extension candidates. Maximal degree in co-relation 35432. Up to 3460 conditions per place. [2024-06-21 16:48:13,484 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 229 selfloop transitions, 36 changer transitions 0/284 dead transitions. [2024-06-21 16:48:13,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 284 transitions, 3325 flow [2024-06-21 16:48:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:48:13,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:48:13,486 INFO L175 Difference]: Start difference. First operand has 227 places, 270 transitions, 2689 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:48:13,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 284 transitions, 3325 flow [2024-06-21 16:48:13,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 284 transitions, 3189 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:13,946 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 2708 flow [2024-06-21 16:48:13,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2708, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2024-06-21 16:48:13,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 16:48:13,947 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 2708 flow [2024-06-21 16:48:13,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:13,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:13,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:13,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:48:13,948 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)] === [2024-06-21 16:48:13,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash 376751545, now seen corresponding path program 2 times [2024-06-21 16:48:13,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:13,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580308669] [2024-06-21 16:48:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:13,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580308669] [2024-06-21 16:48:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580308669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:14,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:14,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232523115] [2024-06-21 16:48:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:14,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:14,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 2708 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:14,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:14,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:14,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:15,432 INFO L124 PetriNetUnfolderBase]: 2366/3860 cut-off events. [2024-06-21 16:48:15,432 INFO L125 PetriNetUnfolderBase]: For 422588/422603 co-relation queries the response was YES. [2024-06-21 16:48:15,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35823 conditions, 3860 events. 2366/3860 cut-off events. For 422588/422603 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22556 event pairs, 598 based on Foata normal form. 12/3858 useless extension candidates. Maximal degree in co-relation 35721. Up to 3457 conditions per place. [2024-06-21 16:48:15,471 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 33 changer transitions 0/297 dead transitions. [2024-06-21 16:48:15,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 297 transitions, 3446 flow [2024-06-21 16:48:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:48:15,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:48:15,472 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 2708 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:48:15,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 297 transitions, 3446 flow [2024-06-21 16:48:15,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 297 transitions, 3254 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 16:48:15,964 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 2704 flow [2024-06-21 16:48:15,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2704, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-21 16:48:15,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 16:48:15,979 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 2704 flow [2024-06-21 16:48:15,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:15,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:15,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:15,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:48:15,980 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)] === [2024-06-21 16:48:15,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1212691001, now seen corresponding path program 3 times [2024-06-21 16:48:15,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:15,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153647083] [2024-06-21 16:48:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153647083] [2024-06-21 16:48:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153647083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:16,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622778907] [2024-06-21 16:48:16,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:16,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:16,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 2704 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:16,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:16,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:17,721 INFO L124 PetriNetUnfolderBase]: 2371/3867 cut-off events. [2024-06-21 16:48:17,721 INFO L125 PetriNetUnfolderBase]: For 434497/434509 co-relation queries the response was YES. [2024-06-21 16:48:17,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36271 conditions, 3867 events. 2371/3867 cut-off events. For 434497/434509 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22650 event pairs, 600 based on Foata normal form. 9/3858 useless extension candidates. Maximal degree in co-relation 36169. Up to 3451 conditions per place. [2024-06-21 16:48:17,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 44 changer transitions 0/301 dead transitions. [2024-06-21 16:48:17,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 301 transitions, 3700 flow [2024-06-21 16:48:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:48:17,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:48:17,764 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 2704 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:48:17,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 301 transitions, 3700 flow [2024-06-21 16:48:18,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 301 transitions, 3534 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:18,360 INFO L231 Difference]: Finished difference. Result has 230 places, 281 transitions, 2870 flow [2024-06-21 16:48:18,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2870, PETRI_PLACES=230, PETRI_TRANSITIONS=281} [2024-06-21 16:48:18,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-21 16:48:18,361 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 281 transitions, 2870 flow [2024-06-21 16:48:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:18,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:18,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:18,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:48:18,361 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)] === [2024-06-21 16:48:18,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1751364123, now seen corresponding path program 4 times [2024-06-21 16:48:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:18,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236533659] [2024-06-21 16:48:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:19,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:19,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236533659] [2024-06-21 16:48:19,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236533659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:19,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:19,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:19,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234720268] [2024-06-21 16:48:19,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:19,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:19,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:19,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:19,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 281 transitions, 2870 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:19,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:19,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:19,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:20,018 INFO L124 PetriNetUnfolderBase]: 2368/3863 cut-off events. [2024-06-21 16:48:20,018 INFO L125 PetriNetUnfolderBase]: For 447781/447796 co-relation queries the response was YES. [2024-06-21 16:48:20,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36546 conditions, 3863 events. 2368/3863 cut-off events. For 447781/447796 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22612 event pairs, 600 based on Foata normal form. 12/3861 useless extension candidates. Maximal degree in co-relation 36443. Up to 3460 conditions per place. [2024-06-21 16:48:20,057 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 32 changer transitions 0/303 dead transitions. [2024-06-21 16:48:20,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 303 transitions, 3510 flow [2024-06-21 16:48:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:48:20,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:48:20,058 INFO L175 Difference]: Start difference. First operand has 230 places, 281 transitions, 2870 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:48:20,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 303 transitions, 3510 flow [2024-06-21 16:48:20,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 303 transitions, 3270 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:20,717 INFO L231 Difference]: Finished difference. Result has 234 places, 281 transitions, 2700 flow [2024-06-21 16:48:20,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=234, PETRI_TRANSITIONS=281} [2024-06-21 16:48:20,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 16:48:20,719 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 281 transitions, 2700 flow [2024-06-21 16:48:20,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:20,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:20,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:48:20,720 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:20,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 701634183, now seen corresponding path program 7 times [2024-06-21 16:48:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:20,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74851629] [2024-06-21 16:48:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:21,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:21,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74851629] [2024-06-21 16:48:21,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74851629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:21,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:21,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605536165] [2024-06-21 16:48:21,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:21,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:21,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:21,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:21,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 281 transitions, 2700 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:21,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:21,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:21,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:22,292 INFO L124 PetriNetUnfolderBase]: 2378/3878 cut-off events. [2024-06-21 16:48:22,292 INFO L125 PetriNetUnfolderBase]: For 460161/460166 co-relation queries the response was YES. [2024-06-21 16:48:22,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 3878 events. 2378/3878 cut-off events. For 460161/460166 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22683 event pairs, 611 based on Foata normal form. 5/3863 useless extension candidates. Maximal degree in co-relation 36685. Up to 3435 conditions per place. [2024-06-21 16:48:22,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 39 changer transitions 0/305 dead transitions. [2024-06-21 16:48:22,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 305 transitions, 3446 flow [2024-06-21 16:48:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:48:22,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:48:22,338 INFO L175 Difference]: Start difference. First operand has 234 places, 281 transitions, 2700 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:48:22,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 305 transitions, 3446 flow [2024-06-21 16:48:22,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 3354 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:22,977 INFO L231 Difference]: Finished difference. Result has 235 places, 284 transitions, 2804 flow [2024-06-21 16:48:22,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2804, PETRI_PLACES=235, PETRI_TRANSITIONS=284} [2024-06-21 16:48:22,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 16:48:22,978 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 284 transitions, 2804 flow [2024-06-21 16:48:22,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:22,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:22,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:48:22,979 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:22,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1451899835, now seen corresponding path program 4 times [2024-06-21 16:48:22,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:22,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138550406] [2024-06-21 16:48:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:22,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:23,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:23,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138550406] [2024-06-21 16:48:23,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138550406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:23,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:23,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038885430] [2024-06-21 16:48:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:23,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:23,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:23,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:23,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 284 transitions, 2804 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:23,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:23,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:23,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:24,552 INFO L124 PetriNetUnfolderBase]: 2446/3951 cut-off events. [2024-06-21 16:48:24,552 INFO L125 PetriNetUnfolderBase]: For 464194/464206 co-relation queries the response was YES. [2024-06-21 16:48:24,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37148 conditions, 3951 events. 2446/3951 cut-off events. For 464194/464206 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22826 event pairs, 631 based on Foata normal form. 10/3955 useless extension candidates. Maximal degree in co-relation 37042. Up to 3669 conditions per place. [2024-06-21 16:48:24,597 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 25 changer transitions 0/306 dead transitions. [2024-06-21 16:48:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3502 flow [2024-06-21 16:48:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:48:24,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 16:48:24,598 INFO L175 Difference]: Start difference. First operand has 235 places, 284 transitions, 2804 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:48:24,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3502 flow [2024-06-21 16:48:25,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3225 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-21 16:48:25,245 INFO L231 Difference]: Finished difference. Result has 235 places, 285 transitions, 2603 flow [2024-06-21 16:48:25,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2603, PETRI_PLACES=235, PETRI_TRANSITIONS=285} [2024-06-21 16:48:25,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 16:48:25,246 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 285 transitions, 2603 flow [2024-06-21 16:48:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:25,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:25,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:48:25,246 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:25,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1451900207, now seen corresponding path program 8 times [2024-06-21 16:48:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:25,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530752345] [2024-06-21 16:48:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:26,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:26,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530752345] [2024-06-21 16:48:26,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530752345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:26,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:26,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718404338] [2024-06-21 16:48:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:26,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:26,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 285 transitions, 2603 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:26,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:26,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:26,896 INFO L124 PetriNetUnfolderBase]: 2364/3862 cut-off events. [2024-06-21 16:48:26,896 INFO L125 PetriNetUnfolderBase]: For 469558/469563 co-relation queries the response was YES. [2024-06-21 16:48:26,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36350 conditions, 3862 events. 2364/3862 cut-off events. For 469558/469563 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22637 event pairs, 605 based on Foata normal form. 5/3847 useless extension candidates. Maximal degree in co-relation 36243. Up to 3407 conditions per place. [2024-06-21 16:48:26,940 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 44 changer transitions 0/304 dead transitions. [2024-06-21 16:48:26,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 3239 flow [2024-06-21 16:48:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:48:26,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:48:26,942 INFO L175 Difference]: Start difference. First operand has 235 places, 285 transitions, 2603 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:48:26,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 3239 flow [2024-06-21 16:48:27,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 3125 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:27,558 INFO L231 Difference]: Finished difference. Result has 237 places, 285 transitions, 2583 flow [2024-06-21 16:48:27,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2583, PETRI_PLACES=237, PETRI_TRANSITIONS=285} [2024-06-21 16:48:27,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 16:48:27,558 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 285 transitions, 2583 flow [2024-06-21 16:48:27,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:27,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:27,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:27,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:48:27,559 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)] === [2024-06-21 16:48:27,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:27,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1097221085, now seen corresponding path program 5 times [2024-06-21 16:48:27,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:27,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23177450] [2024-06-21 16:48:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:28,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:28,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23177450] [2024-06-21 16:48:28,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23177450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:28,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:28,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:28,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136312611] [2024-06-21 16:48:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:28,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:28,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:28,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:28,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 285 transitions, 2583 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:28,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:28,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:29,085 INFO L124 PetriNetUnfolderBase]: 2466/3981 cut-off events. [2024-06-21 16:48:29,085 INFO L125 PetriNetUnfolderBase]: For 484339/484351 co-relation queries the response was YES. [2024-06-21 16:48:29,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37427 conditions, 3981 events. 2466/3981 cut-off events. For 484339/484351 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23032 event pairs, 622 based on Foata normal form. 10/3985 useless extension candidates. Maximal degree in co-relation 37319. Up to 3642 conditions per place. [2024-06-21 16:48:29,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 262 selfloop transitions, 44 changer transitions 0/311 dead transitions. [2024-06-21 16:48:29,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 311 transitions, 3611 flow [2024-06-21 16:48:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:48:29,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:48:29,129 INFO L175 Difference]: Start difference. First operand has 237 places, 285 transitions, 2583 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:48:29,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 311 transitions, 3611 flow [2024-06-21 16:48:29,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 311 transitions, 3447 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:29,706 INFO L231 Difference]: Finished difference. Result has 238 places, 291 transitions, 2711 flow [2024-06-21 16:48:29,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2711, PETRI_PLACES=238, PETRI_TRANSITIONS=291} [2024-06-21 16:48:29,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 16:48:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 291 transitions, 2711 flow [2024-06-21 16:48:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:29,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:29,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:48:29,707 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)] === [2024-06-21 16:48:29,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash 503233591, now seen corresponding path program 6 times [2024-06-21 16:48:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343992848] [2024-06-21 16:48:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343992848] [2024-06-21 16:48:30,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343992848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:30,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:30,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777238205] [2024-06-21 16:48:30,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:30,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:30,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 291 transitions, 2711 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:30,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:30,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:30,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:31,156 INFO L124 PetriNetUnfolderBase]: 2460/3973 cut-off events. [2024-06-21 16:48:31,157 INFO L125 PetriNetUnfolderBase]: For 494385/494397 co-relation queries the response was YES. [2024-06-21 16:48:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 3973 events. 2460/3973 cut-off events. For 494385/494397 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22965 event pairs, 626 based on Foata normal form. 10/3977 useless extension candidates. Maximal degree in co-relation 37491. Up to 3637 conditions per place. [2024-06-21 16:48:31,202 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 42 changer transitions 0/310 dead transitions. [2024-06-21 16:48:31,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 310 transitions, 3397 flow [2024-06-21 16:48:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:48:31,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:48:31,203 INFO L175 Difference]: Start difference. First operand has 238 places, 291 transitions, 2711 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:48:31,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 310 transitions, 3397 flow [2024-06-21 16:48:31,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 310 transitions, 3203 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:31,977 INFO L231 Difference]: Finished difference. Result has 242 places, 291 transitions, 2607 flow [2024-06-21 16:48:31,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2607, PETRI_PLACES=242, PETRI_TRANSITIONS=291} [2024-06-21 16:48:31,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 16:48:31,977 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 291 transitions, 2607 flow [2024-06-21 16:48:31,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:31,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:31,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:31,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:48:31,978 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)] === [2024-06-21 16:48:31,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash 144889859, now seen corresponding path program 9 times [2024-06-21 16:48:31,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:31,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084715476] [2024-06-21 16:48:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084715476] [2024-06-21 16:48:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084715476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:32,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305638903] [2024-06-21 16:48:32,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:32,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:32,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 291 transitions, 2607 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:32,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:32,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:32,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:33,438 INFO L124 PetriNetUnfolderBase]: 2397/3917 cut-off events. [2024-06-21 16:48:33,439 INFO L125 PetriNetUnfolderBase]: For 512136/512141 co-relation queries the response was YES. [2024-06-21 16:48:33,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37643 conditions, 3917 events. 2397/3917 cut-off events. For 512136/512141 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23100 event pairs, 603 based on Foata normal form. 5/3893 useless extension candidates. Maximal degree in co-relation 37532. Up to 3398 conditions per place. [2024-06-21 16:48:33,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 62 changer transitions 0/311 dead transitions. [2024-06-21 16:48:33,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 311 transitions, 3381 flow [2024-06-21 16:48:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:48:33,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:48:33,486 INFO L175 Difference]: Start difference. First operand has 242 places, 291 transitions, 2607 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:48:33,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 311 transitions, 3381 flow [2024-06-21 16:48:34,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 311 transitions, 3263 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:34,154 INFO L231 Difference]: Finished difference. Result has 243 places, 294 transitions, 2755 flow [2024-06-21 16:48:34,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2755, PETRI_PLACES=243, PETRI_TRANSITIONS=294} [2024-06-21 16:48:34,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 16:48:34,155 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 294 transitions, 2755 flow [2024-06-21 16:48:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:34,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:34,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:34,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:48:34,156 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)] === [2024-06-21 16:48:34,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1248961899, now seen corresponding path program 7 times [2024-06-21 16:48:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:34,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300410022] [2024-06-21 16:48:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:34,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300410022] [2024-06-21 16:48:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300410022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:34,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:34,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220844523] [2024-06-21 16:48:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:34,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:34,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 294 transitions, 2755 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:34,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:34,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:34,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:35,591 INFO L124 PetriNetUnfolderBase]: 2504/4048 cut-off events. [2024-06-21 16:48:35,592 INFO L125 PetriNetUnfolderBase]: For 535406/535421 co-relation queries the response was YES. [2024-06-21 16:48:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39344 conditions, 4048 events. 2504/4048 cut-off events. For 535406/535421 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23566 event pairs, 626 based on Foata normal form. 12/4052 useless extension candidates. Maximal degree in co-relation 39232. Up to 3583 conditions per place. [2024-06-21 16:48:35,638 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 240 selfloop transitions, 81 changer transitions 0/326 dead transitions. [2024-06-21 16:48:35,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 326 transitions, 4117 flow [2024-06-21 16:48:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:48:35,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:48:35,640 INFO L175 Difference]: Start difference. First operand has 243 places, 294 transitions, 2755 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:48:35,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 326 transitions, 4117 flow [2024-06-21 16:48:36,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 326 transitions, 3873 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:36,342 INFO L231 Difference]: Finished difference. Result has 247 places, 306 transitions, 3060 flow [2024-06-21 16:48:36,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3060, PETRI_PLACES=247, PETRI_TRANSITIONS=306} [2024-06-21 16:48:36,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 16:48:36,343 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 306 transitions, 3060 flow [2024-06-21 16:48:36,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:36,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:36,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:36,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:48:36,344 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)] === [2024-06-21 16:48:36,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1903577897, now seen corresponding path program 10 times [2024-06-21 16:48:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088050942] [2024-06-21 16:48:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:37,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088050942] [2024-06-21 16:48:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088050942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:37,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:37,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771335815] [2024-06-21 16:48:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:37,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:37,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:37,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:37,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 306 transitions, 3060 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:37,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:37,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:37,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:37,925 INFO L124 PetriNetUnfolderBase]: 2463/4030 cut-off events. [2024-06-21 16:48:37,925 INFO L125 PetriNetUnfolderBase]: For 571169/571174 co-relation queries the response was YES. [2024-06-21 16:48:37,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40614 conditions, 4030 events. 2463/4030 cut-off events. For 571169/571174 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23960 event pairs, 627 based on Foata normal form. 4/4002 useless extension candidates. Maximal degree in co-relation 40499. Up to 3385 conditions per place. [2024-06-21 16:48:37,970 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 211 selfloop transitions, 95 changer transitions 0/332 dead transitions. [2024-06-21 16:48:37,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 332 transitions, 4460 flow [2024-06-21 16:48:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:48:37,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 16:48:37,972 INFO L175 Difference]: Start difference. First operand has 247 places, 306 transitions, 3060 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:48:37,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 332 transitions, 4460 flow [2024-06-21 16:48:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 332 transitions, 4192 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:38,673 INFO L231 Difference]: Finished difference. Result has 251 places, 315 transitions, 3408 flow [2024-06-21 16:48:38,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3408, PETRI_PLACES=251, PETRI_TRANSITIONS=315} [2024-06-21 16:48:38,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 16:48:38,673 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 315 transitions, 3408 flow [2024-06-21 16:48:38,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:38,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:38,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:38,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:48:38,674 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)] === [2024-06-21 16:48:38,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash -931998033, now seen corresponding path program 11 times [2024-06-21 16:48:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135409797] [2024-06-21 16:48:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135409797] [2024-06-21 16:48:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135409797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420666279] [2024-06-21 16:48:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:39,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:39,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 315 transitions, 3408 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:39,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:39,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:39,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:40,211 INFO L124 PetriNetUnfolderBase]: 2458/4025 cut-off events. [2024-06-21 16:48:40,212 INFO L125 PetriNetUnfolderBase]: For 571319/571324 co-relation queries the response was YES. [2024-06-21 16:48:40,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40163 conditions, 4025 events. 2458/4025 cut-off events. For 571319/571324 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23912 event pairs, 633 based on Foata normal form. 4/3997 useless extension candidates. Maximal degree in co-relation 40047. Up to 3381 conditions per place. [2024-06-21 16:48:40,261 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 97 changer transitions 0/331 dead transitions. [2024-06-21 16:48:40,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 331 transitions, 4238 flow [2024-06-21 16:48:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:48:40,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:48:40,263 INFO L175 Difference]: Start difference. First operand has 251 places, 315 transitions, 3408 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:48:40,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 331 transitions, 4238 flow [2024-06-21 16:48:40,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 331 transitions, 3840 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:40,963 INFO L231 Difference]: Finished difference. Result has 255 places, 315 transitions, 3210 flow [2024-06-21 16:48:40,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3210, PETRI_PLACES=255, PETRI_TRANSITIONS=315} [2024-06-21 16:48:40,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 16:48:40,964 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 315 transitions, 3210 flow [2024-06-21 16:48:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:40,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:40,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:48:40,965 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:40,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1908219899, now seen corresponding path program 8 times [2024-06-21 16:48:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:40,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988055990] [2024-06-21 16:48:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:41,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:41,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988055990] [2024-06-21 16:48:41,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988055990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:41,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:41,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:41,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19147666] [2024-06-21 16:48:41,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:41,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:41,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:41,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 315 transitions, 3210 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:41,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:41,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:41,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:42,503 INFO L124 PetriNetUnfolderBase]: 2558/4131 cut-off events. [2024-06-21 16:48:42,503 INFO L125 PetriNetUnfolderBase]: For 572917/572932 co-relation queries the response was YES. [2024-06-21 16:48:42,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4131 events. 2558/4131 cut-off events. For 572917/572932 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24093 event pairs, 635 based on Foata normal form. 12/4135 useless extension candidates. Maximal degree in co-relation 40266. Up to 3647 conditions per place. [2024-06-21 16:48:42,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 88 changer transitions 0/343 dead transitions. [2024-06-21 16:48:42,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 343 transitions, 4500 flow [2024-06-21 16:48:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:48:42,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:48:42,555 INFO L175 Difference]: Start difference. First operand has 255 places, 315 transitions, 3210 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:48:42,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 343 transitions, 4500 flow [2024-06-21 16:48:43,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 343 transitions, 4268 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:43,348 INFO L231 Difference]: Finished difference. Result has 257 places, 324 transitions, 3425 flow [2024-06-21 16:48:43,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=257, PETRI_TRANSITIONS=324} [2024-06-21 16:48:43,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 16:48:43,349 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 324 transitions, 3425 flow [2024-06-21 16:48:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:43,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:43,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:43,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:48:43,349 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:43,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash -843750669, now seen corresponding path program 9 times [2024-06-21 16:48:43,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:43,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35946571] [2024-06-21 16:48:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:43,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35946571] [2024-06-21 16:48:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35946571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:44,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:44,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559798208] [2024-06-21 16:48:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:44,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:44,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 324 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:44,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:44,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:44,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:44,940 INFO L124 PetriNetUnfolderBase]: 2568/4141 cut-off events. [2024-06-21 16:48:44,940 INFO L125 PetriNetUnfolderBase]: For 586215/586230 co-relation queries the response was YES. [2024-06-21 16:48:44,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40743 conditions, 4141 events. 2568/4141 cut-off events. For 586215/586230 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24132 event pairs, 619 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 40624. Up to 3657 conditions per place. [2024-06-21 16:48:44,988 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 96 changer transitions 0/346 dead transitions. [2024-06-21 16:48:44,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 346 transitions, 4598 flow [2024-06-21 16:48:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:48:44,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:48:44,990 INFO L175 Difference]: Start difference. First operand has 257 places, 324 transitions, 3425 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:48:44,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 346 transitions, 4598 flow [2024-06-21 16:48:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 346 transitions, 4393 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 16:48:45,733 INFO L231 Difference]: Finished difference. Result has 262 places, 327 transitions, 3511 flow [2024-06-21 16:48:45,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3511, PETRI_PLACES=262, PETRI_TRANSITIONS=327} [2024-06-21 16:48:45,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 16:48:45,734 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 327 transitions, 3511 flow [2024-06-21 16:48:45,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:45,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:45,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:48:45,734 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:45,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1249319391, now seen corresponding path program 12 times [2024-06-21 16:48:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:45,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826351900] [2024-06-21 16:48:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:45,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:46,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826351900] [2024-06-21 16:48:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826351900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:46,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:46,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553022515] [2024-06-21 16:48:46,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:46,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:46,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:46,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 327 transitions, 3511 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:46,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:46,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:46,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:47,416 INFO L124 PetriNetUnfolderBase]: 2489/4053 cut-off events. [2024-06-21 16:48:47,416 INFO L125 PetriNetUnfolderBase]: For 593680/593682 co-relation queries the response was YES. [2024-06-21 16:48:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40149 conditions, 4053 events. 2489/4053 cut-off events. For 593680/593682 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23811 event pairs, 627 based on Foata normal form. 2/4039 useless extension candidates. Maximal degree in co-relation 40029. Up to 3610 conditions per place. [2024-06-21 16:48:47,461 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 37 changer transitions 0/339 dead transitions. [2024-06-21 16:48:47,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 339 transitions, 4169 flow [2024-06-21 16:48:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:48:47,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 16:48:47,462 INFO L175 Difference]: Start difference. First operand has 262 places, 327 transitions, 3511 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:48:47,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 339 transitions, 4169 flow [2024-06-21 16:48:48,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 339 transitions, 3875 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:48,350 INFO L231 Difference]: Finished difference. Result has 266 places, 327 transitions, 3297 flow [2024-06-21 16:48:48,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=266, PETRI_TRANSITIONS=327} [2024-06-21 16:48:48,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 16:48:48,351 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 327 transitions, 3297 flow [2024-06-21 16:48:48,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 16:48:48,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:48,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:48,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:48:48,351 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:48,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:48,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1851146905, now seen corresponding path program 10 times [2024-06-21 16:48:48,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:48,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006828572] [2024-06-21 16:48:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:48,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006828572] [2024-06-21 16:48:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006828572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:49,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973256059] [2024-06-21 16:48:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:49,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 327 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:49,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:49,810 INFO L124 PetriNetUnfolderBase]: 2556/4127 cut-off events. [2024-06-21 16:48:49,811 INFO L125 PetriNetUnfolderBase]: For 594966/594981 co-relation queries the response was YES. [2024-06-21 16:48:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40025 conditions, 4127 events. 2556/4127 cut-off events. For 594966/594981 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24104 event pairs, 624 based on Foata normal form. 12/4131 useless extension candidates. Maximal degree in co-relation 39904. Up to 3644 conditions per place. [2024-06-21 16:48:49,860 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 91 changer transitions 0/346 dead transitions. [2024-06-21 16:48:49,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 346 transitions, 4385 flow [2024-06-21 16:48:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:48:49,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:48:49,861 INFO L175 Difference]: Start difference. First operand has 266 places, 327 transitions, 3297 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:48:49,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 346 transitions, 4385 flow [2024-06-21 16:48:50,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 346 transitions, 4235 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:50,788 INFO L231 Difference]: Finished difference. Result has 267 places, 327 transitions, 3335 flow [2024-06-21 16:48:50,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3335, PETRI_PLACES=267, PETRI_TRANSITIONS=327} [2024-06-21 16:48:50,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 16:48:50,789 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 327 transitions, 3335 flow [2024-06-21 16:48:50,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:50,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:50,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:48:50,789 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:50,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1072055439, now seen corresponding path program 11 times [2024-06-21 16:48:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:50,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161807703] [2024-06-21 16:48:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:50,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161807703] [2024-06-21 16:48:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161807703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:51,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:51,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:51,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123703608] [2024-06-21 16:48:51,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:51,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:51,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 327 transitions, 3335 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:51,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:51,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:52,330 INFO L124 PetriNetUnfolderBase]: 2550/4121 cut-off events. [2024-06-21 16:48:52,330 INFO L125 PetriNetUnfolderBase]: For 600379/600394 co-relation queries the response was YES. [2024-06-21 16:48:52,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40037 conditions, 4121 events. 2550/4121 cut-off events. For 600379/600394 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24052 event pairs, 633 based on Foata normal form. 12/4125 useless extension candidates. Maximal degree in co-relation 39915. Up to 3639 conditions per place. [2024-06-21 16:48:52,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 92 changer transitions 0/345 dead transitions. [2024-06-21 16:48:52,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 345 transitions, 4257 flow [2024-06-21 16:48:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:48:52,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:48:52,382 INFO L175 Difference]: Start difference. First operand has 267 places, 327 transitions, 3335 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:48:52,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 345 transitions, 4257 flow [2024-06-21 16:48:53,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 345 transitions, 4025 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:48:53,161 INFO L231 Difference]: Finished difference. Result has 270 places, 327 transitions, 3293 flow [2024-06-21 16:48:53,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3293, PETRI_PLACES=270, PETRI_TRANSITIONS=327} [2024-06-21 16:48:53,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 16:48:53,162 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 327 transitions, 3293 flow [2024-06-21 16:48:53,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:53,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:53,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:48:53,162 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:53,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash -849464589, now seen corresponding path program 12 times [2024-06-21 16:48:53,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318714811] [2024-06-21 16:48:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:53,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:53,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:53,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318714811] [2024-06-21 16:48:53,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318714811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:53,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:53,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478668096] [2024-06-21 16:48:53,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:53,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:54,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:48:54,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 327 transitions, 3293 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:54,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:54,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:48:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:54,742 INFO L124 PetriNetUnfolderBase]: 2544/4115 cut-off events. [2024-06-21 16:48:54,743 INFO L125 PetriNetUnfolderBase]: For 605295/605310 co-relation queries the response was YES. [2024-06-21 16:48:54,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39890 conditions, 4115 events. 2544/4115 cut-off events. For 605295/605310 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24051 event pairs, 620 based on Foata normal form. 12/4119 useless extension candidates. Maximal degree in co-relation 39767. Up to 3634 conditions per place. [2024-06-21 16:48:54,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 96 changer transitions 0/344 dead transitions. [2024-06-21 16:48:54,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 344 transitions, 4045 flow [2024-06-21 16:48:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:48:54,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:48:54,793 INFO L175 Difference]: Start difference. First operand has 270 places, 327 transitions, 3293 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:48:54,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 344 transitions, 4045 flow [2024-06-21 16:48:55,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 344 transitions, 3793 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:55,539 INFO L231 Difference]: Finished difference. Result has 271 places, 327 transitions, 3239 flow [2024-06-21 16:48:55,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3239, PETRI_PLACES=271, PETRI_TRANSITIONS=327} [2024-06-21 16:48:55,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 16:48:55,540 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 327 transitions, 3239 flow [2024-06-21 16:48:55,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 16:48:55,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:55,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:55,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:48:55,540 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)] === [2024-06-21 16:48:55,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1248952971, now seen corresponding path program 2 times [2024-06-21 16:48:55,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:55,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283749680] [2024-06-21 16:48:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:55,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:56,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:56,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283749680] [2024-06-21 16:48:56,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283749680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:56,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:56,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313836967] [2024-06-21 16:48:56,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:56,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:56,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:56,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:56,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 327 transitions, 3239 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:56,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:56,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:56,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:57,137 INFO L124 PetriNetUnfolderBase]: 2369/3862 cut-off events. [2024-06-21 16:48:57,137 INFO L125 PetriNetUnfolderBase]: For 620950/620974 co-relation queries the response was YES. [2024-06-21 16:48:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 3862 events. 2369/3862 cut-off events. For 620950/620974 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22799 event pairs, 614 based on Foata normal form. 10/3809 useless extension candidates. Maximal degree in co-relation 38299. Up to 3385 conditions per place. [2024-06-21 16:48:57,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 65 changer transitions 0/346 dead transitions. [2024-06-21 16:48:57,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 346 transitions, 4211 flow [2024-06-21 16:48:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:48:57,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:48:57,185 INFO L175 Difference]: Start difference. First operand has 271 places, 327 transitions, 3239 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:48:57,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 346 transitions, 4211 flow [2024-06-21 16:48:58,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 346 transitions, 3979 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:48:58,147 INFO L231 Difference]: Finished difference. Result has 272 places, 333 transitions, 3313 flow [2024-06-21 16:48:58,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3313, PETRI_PLACES=272, PETRI_TRANSITIONS=333} [2024-06-21 16:48:58,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 16:48:58,148 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 333 transitions, 3313 flow [2024-06-21 16:48:58,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:58,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:58,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:58,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:48:58,149 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)] === [2024-06-21 16:48:58,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash -835170861, now seen corresponding path program 3 times [2024-06-21 16:48:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:58,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733151386] [2024-06-21 16:48:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733151386] [2024-06-21 16:48:58,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733151386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:58,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:58,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386197240] [2024-06-21 16:48:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:59,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:48:59,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 333 transitions, 3313 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:59,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:59,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:48:59,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:59,875 INFO L124 PetriNetUnfolderBase]: 2377/3881 cut-off events. [2024-06-21 16:48:59,875 INFO L125 PetriNetUnfolderBase]: For 637998/638024 co-relation queries the response was YES. [2024-06-21 16:48:59,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 3881 events. 2377/3881 cut-off events. For 637998/638024 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22974 event pairs, 613 based on Foata normal form. 10/3842 useless extension candidates. Maximal degree in co-relation 38809. Up to 3489 conditions per place. [2024-06-21 16:48:59,921 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 20 changer transitions 0/348 dead transitions. [2024-06-21 16:48:59,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 348 transitions, 4041 flow [2024-06-21 16:48:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:48:59,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 16:48:59,922 INFO L175 Difference]: Start difference. First operand has 272 places, 333 transitions, 3313 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:48:59,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 348 transitions, 4041 flow [2024-06-21 16:49:00,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 348 transitions, 3899 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 16:49:00,694 INFO L231 Difference]: Finished difference. Result has 276 places, 336 transitions, 3311 flow [2024-06-21 16:49:00,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3311, PETRI_PLACES=276, PETRI_TRANSITIONS=336} [2024-06-21 16:49:00,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 16:49:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 336 transitions, 3311 flow [2024-06-21 16:49:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:00,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:00,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:00,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:49:00,696 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)] === [2024-06-21 16:49:00,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash -835646091, now seen corresponding path program 4 times [2024-06-21 16:49:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:00,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192338643] [2024-06-21 16:49:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192338643] [2024-06-21 16:49:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192338643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:01,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873416483] [2024-06-21 16:49:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:01,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:49:01,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 336 transitions, 3311 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:01,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:01,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:49:01,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:02,439 INFO L124 PetriNetUnfolderBase]: 2382/3880 cut-off events. [2024-06-21 16:49:02,439 INFO L125 PetriNetUnfolderBase]: For 650813/650853 co-relation queries the response was YES. [2024-06-21 16:49:02,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39048 conditions, 3880 events. 2382/3880 cut-off events. For 650813/650853 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22867 event pairs, 612 based on Foata normal form. 10/3826 useless extension candidates. Maximal degree in co-relation 38921. Up to 3397 conditions per place. [2024-06-21 16:49:02,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 78 changer transitions 0/352 dead transitions. [2024-06-21 16:49:02,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 352 transitions, 4225 flow [2024-06-21 16:49:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:49:02,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:49:02,492 INFO L175 Difference]: Start difference. First operand has 276 places, 336 transitions, 3311 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:49:02,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 352 transitions, 4225 flow [2024-06-21 16:49:03,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 352 transitions, 4117 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:03,348 INFO L231 Difference]: Finished difference. Result has 278 places, 339 transitions, 3455 flow [2024-06-21 16:49:03,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3455, PETRI_PLACES=278, PETRI_TRANSITIONS=339} [2024-06-21 16:49:03,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 16:49:03,348 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 339 transitions, 3455 flow [2024-06-21 16:49:03,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:03,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:03,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:03,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:49:03,353 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)] === [2024-06-21 16:49:03,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash -849455661, now seen corresponding path program 5 times [2024-06-21 16:49:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320418216] [2024-06-21 16:49:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:03,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:04,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320418216] [2024-06-21 16:49:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320418216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:04,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:04,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034501668] [2024-06-21 16:49:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:04,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:49:04,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 339 transitions, 3455 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:04,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:04,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:49:04,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:05,063 INFO L124 PetriNetUnfolderBase]: 2378/3871 cut-off events. [2024-06-21 16:49:05,063 INFO L125 PetriNetUnfolderBase]: For 655897/655925 co-relation queries the response was YES. [2024-06-21 16:49:05,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39044 conditions, 3871 events. 2378/3871 cut-off events. For 655897/655925 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22787 event pairs, 613 based on Foata normal form. 10/3818 useless extension candidates. Maximal degree in co-relation 38916. Up to 3394 conditions per place. [2024-06-21 16:49:05,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 74 changer transitions 0/351 dead transitions. [2024-06-21 16:49:05,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 351 transitions, 4101 flow [2024-06-21 16:49:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:49:05,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:49:05,118 INFO L175 Difference]: Start difference. First operand has 278 places, 339 transitions, 3455 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:49:05,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 351 transitions, 4101 flow [2024-06-21 16:49:06,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 351 transitions, 3824 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:06,050 INFO L231 Difference]: Finished difference. Result has 281 places, 339 transitions, 3332 flow [2024-06-21 16:49:06,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3332, PETRI_PLACES=281, PETRI_TRANSITIONS=339} [2024-06-21 16:49:06,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 16:49:06,050 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 339 transitions, 3332 flow [2024-06-21 16:49:06,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:06,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:06,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:06,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:49:06,051 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)] === [2024-06-21 16:49:06,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 385331353, now seen corresponding path program 1 times [2024-06-21 16:49:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:06,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513705748] [2024-06-21 16:49:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:06,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:06,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513705748] [2024-06-21 16:49:06,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513705748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:06,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:06,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287329507] [2024-06-21 16:49:06,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:06,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:49:06,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 339 transitions, 3332 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:06,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:06,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:49:06,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:07,683 INFO L124 PetriNetUnfolderBase]: 2373/3934 cut-off events. [2024-06-21 16:49:07,684 INFO L125 PetriNetUnfolderBase]: For 672595/672597 co-relation queries the response was YES. [2024-06-21 16:49:07,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39582 conditions, 3934 events. 2373/3934 cut-off events. For 672595/672597 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23741 event pairs, 546 based on Foata normal form. 2/3920 useless extension candidates. Maximal degree in co-relation 39453. Up to 3448 conditions per place. [2024-06-21 16:49:07,730 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 15 changer transitions 0/363 dead transitions. [2024-06-21 16:49:07,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 363 transitions, 4130 flow [2024-06-21 16:49:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:49:07,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:49:07,731 INFO L175 Difference]: Start difference. First operand has 281 places, 339 transitions, 3332 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:49:07,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 363 transitions, 4130 flow [2024-06-21 16:49:08,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 363 transitions, 3930 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:49:08,617 INFO L231 Difference]: Finished difference. Result has 280 places, 341 transitions, 3249 flow [2024-06-21 16:49:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3249, PETRI_PLACES=280, PETRI_TRANSITIONS=341} [2024-06-21 16:49:08,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 16:49:08,618 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 341 transitions, 3249 flow [2024-06-21 16:49:08,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:08,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:08,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:49:08,618 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)] === [2024-06-21 16:49:08,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1212682073, now seen corresponding path program 2 times [2024-06-21 16:49:08,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027347746] [2024-06-21 16:49:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:08,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027347746] [2024-06-21 16:49:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027347746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:09,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:09,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668842341] [2024-06-21 16:49:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:09,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:49:09,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 341 transitions, 3249 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:09,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:09,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:49:09,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:10,217 INFO L124 PetriNetUnfolderBase]: 2382/3949 cut-off events. [2024-06-21 16:49:10,218 INFO L125 PetriNetUnfolderBase]: For 687016/687018 co-relation queries the response was YES. [2024-06-21 16:49:10,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39861 conditions, 3949 events. 2382/3949 cut-off events. For 687016/687018 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23886 event pairs, 582 based on Foata normal form. 2/3931 useless extension candidates. Maximal degree in co-relation 39731. Up to 3478 conditions per place. [2024-06-21 16:49:10,271 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 310 selfloop transitions, 16 changer transitions 0/361 dead transitions. [2024-06-21 16:49:10,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 361 transitions, 4035 flow [2024-06-21 16:49:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:49:10,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:49:10,272 INFO L175 Difference]: Start difference. First operand has 280 places, 341 transitions, 3249 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:49:10,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 361 transitions, 4035 flow [2024-06-21 16:49:11,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 361 transitions, 3934 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:11,165 INFO L231 Difference]: Finished difference. Result has 282 places, 343 transitions, 3271 flow [2024-06-21 16:49:11,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3271, PETRI_PLACES=282, PETRI_TRANSITIONS=343} [2024-06-21 16:49:11,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 16:49:11,165 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 343 transitions, 3271 flow [2024-06-21 16:49:11,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:11,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:11,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:49:11,166 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)] === [2024-06-21 16:49:11,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash 388193273, now seen corresponding path program 1 times [2024-06-21 16:49:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872862165] [2024-06-21 16:49:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872862165] [2024-06-21 16:49:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872862165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:11,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:11,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238712355] [2024-06-21 16:49:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:12,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:49:12,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 343 transitions, 3271 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:12,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:12,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:49:12,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:12,820 INFO L124 PetriNetUnfolderBase]: 2448/4017 cut-off events. [2024-06-21 16:49:12,820 INFO L125 PetriNetUnfolderBase]: For 690813/690815 co-relation queries the response was YES. [2024-06-21 16:49:12,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40032 conditions, 4017 events. 2448/4017 cut-off events. For 690813/690815 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23901 event pairs, 610 based on Foata normal form. 2/4003 useless extension candidates. Maximal degree in co-relation 39901. Up to 3670 conditions per place. [2024-06-21 16:49:12,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 20 changer transitions 0/364 dead transitions. [2024-06-21 16:49:12,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 364 transitions, 4131 flow [2024-06-21 16:49:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:49:12,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:49:12,873 INFO L175 Difference]: Start difference. First operand has 282 places, 343 transitions, 3271 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:49:12,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 364 transitions, 4131 flow [2024-06-21 16:49:13,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 364 transitions, 4024 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:13,819 INFO L231 Difference]: Finished difference. Result has 285 places, 346 transitions, 3318 flow [2024-06-21 16:49:13,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3318, PETRI_PLACES=285, PETRI_TRANSITIONS=346} [2024-06-21 16:49:13,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 16:49:13,820 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 346 transitions, 3318 flow [2024-06-21 16:49:13,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:13,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:13,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:49:13,821 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)] === [2024-06-21 16:49:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 503479483, now seen corresponding path program 3 times [2024-06-21 16:49:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:13,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104859801] [2024-06-21 16:49:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:13,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:14,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:14,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104859801] [2024-06-21 16:49:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104859801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:14,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970358430] [2024-06-21 16:49:14,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:14,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:14,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:49:14,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 346 transitions, 3318 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:14,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:14,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:49:14,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:15,759 INFO L124 PetriNetUnfolderBase]: 2384/3953 cut-off events. [2024-06-21 16:49:15,760 INFO L125 PetriNetUnfolderBase]: For 708940/708942 co-relation queries the response was YES. [2024-06-21 16:49:15,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40154 conditions, 3953 events. 2384/3953 cut-off events. For 708940/708942 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23885 event pairs, 576 based on Foata normal form. 2/3931 useless extension candidates. Maximal degree in co-relation 40022. Up to 3477 conditions per place. [2024-06-21 16:49:15,812 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 310 selfloop transitions, 21 changer transitions 0/366 dead transitions. [2024-06-21 16:49:15,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 366 transitions, 4137 flow [2024-06-21 16:49:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:49:15,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:49:15,813 INFO L175 Difference]: Start difference. First operand has 285 places, 346 transitions, 3318 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:49:15,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 366 transitions, 4137 flow [2024-06-21 16:49:16,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 366 transitions, 4005 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:16,740 INFO L231 Difference]: Finished difference. Result has 287 places, 351 transitions, 3362 flow [2024-06-21 16:49:16,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3362, PETRI_PLACES=287, PETRI_TRANSITIONS=351} [2024-06-21 16:49:16,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 16:49:16,740 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 351 transitions, 3362 flow [2024-06-21 16:49:16,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:16,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:16,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:49:16,741 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)] === [2024-06-21 16:49:16,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1071821637, now seen corresponding path program 4 times [2024-06-21 16:49:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123630572] [2024-06-21 16:49:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:17,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123630572] [2024-06-21 16:49:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123630572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:17,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:17,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:17,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450673203] [2024-06-21 16:49:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:17,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:17,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 16:49:17,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 351 transitions, 3362 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:17,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:17,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 16:49:17,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:18,670 INFO L124 PetriNetUnfolderBase]: 2379/3946 cut-off events. [2024-06-21 16:49:18,671 INFO L125 PetriNetUnfolderBase]: For 714602/714607 co-relation queries the response was YES. [2024-06-21 16:49:18,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40218 conditions, 3946 events. 2379/3946 cut-off events. For 714602/714607 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23841 event pairs, 579 based on Foata normal form. 2/3918 useless extension candidates. Maximal degree in co-relation 40084. Up to 3461 conditions per place. [2024-06-21 16:49:18,716 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 28 changer transitions 0/368 dead transitions. [2024-06-21 16:49:18,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 368 transitions, 4181 flow [2024-06-21 16:49:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:49:18,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 16:49:18,717 INFO L175 Difference]: Start difference. First operand has 287 places, 351 transitions, 3362 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:49:18,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 368 transitions, 4181 flow [2024-06-21 16:49:19,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 368 transitions, 4064 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:19,579 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 3437 flow [2024-06-21 16:49:19,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3437, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-21 16:49:19,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 16:49:19,580 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 3437 flow [2024-06-21 16:49:19,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:19,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:19,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:19,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:49:19,580 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)] === [2024-06-21 16:49:19,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash -835153997, now seen corresponding path program 1 times [2024-06-21 16:49:19,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:19,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542887731] [2024-06-21 16:49:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:19,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542887731] [2024-06-21 16:49:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542887731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:20,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:49:20,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067428899] [2024-06-21 16:49:20,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:20,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:49:20,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:49:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:49:20,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:49:20,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 3437 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:20,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:20,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:49:20,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:21,696 INFO L124 PetriNetUnfolderBase]: 2376/3895 cut-off events. [2024-06-21 16:49:21,696 INFO L125 PetriNetUnfolderBase]: For 716260/716282 co-relation queries the response was YES. [2024-06-21 16:49:21,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39894 conditions, 3895 events. 2376/3895 cut-off events. For 716260/716282 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23075 event pairs, 600 based on Foata normal form. 10/3856 useless extension candidates. Maximal degree in co-relation 39758. Up to 3488 conditions per place. [2024-06-21 16:49:21,750 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 22 changer transitions 0/372 dead transitions. [2024-06-21 16:49:21,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 372 transitions, 4211 flow [2024-06-21 16:49:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:49:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:49:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 16:49:21,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:49:21,752 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 3437 flow. Second operand 10 states and 170 transitions. [2024-06-21 16:49:21,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 372 transitions, 4211 flow [2024-06-21 16:49:22,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 372 transitions, 4064 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 16:49:22,727 INFO L231 Difference]: Finished difference. Result has 297 places, 358 transitions, 3425 flow [2024-06-21 16:49:22,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3425, PETRI_PLACES=297, PETRI_TRANSITIONS=358} [2024-06-21 16:49:22,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 16:49:22,728 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 358 transitions, 3425 flow [2024-06-21 16:49:22,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:22,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:22,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:49:22,728 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)] === [2024-06-21 16:49:22,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash -338889165, now seen corresponding path program 1 times [2024-06-21 16:49:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192346429] [2024-06-21 16:49:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192346429] [2024-06-21 16:49:23,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192346429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:23,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:23,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941087245] [2024-06-21 16:49:23,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:23,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:23,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:23,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:23,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 358 transitions, 3425 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:23,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:23,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:23,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:24,536 INFO L124 PetriNetUnfolderBase]: 2584/4162 cut-off events. [2024-06-21 16:49:24,536 INFO L125 PetriNetUnfolderBase]: For 733472/733476 co-relation queries the response was YES. [2024-06-21 16:49:24,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41817 conditions, 4162 events. 2584/4162 cut-off events. For 733472/733476 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24231 event pairs, 505 based on Foata normal form. 6/4166 useless extension candidates. Maximal degree in co-relation 41680. Up to 3824 conditions per place. [2024-06-21 16:49:24,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 26 changer transitions 0/390 dead transitions. [2024-06-21 16:49:24,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 390 transitions, 4347 flow [2024-06-21 16:49:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:49:24,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:49:24,594 INFO L175 Difference]: Start difference. First operand has 297 places, 358 transitions, 3425 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:49:24,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 390 transitions, 4347 flow [2024-06-21 16:49:25,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 390 transitions, 4228 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 16:49:25,770 INFO L231 Difference]: Finished difference. Result has 298 places, 360 transitions, 3427 flow [2024-06-21 16:49:25,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3427, PETRI_PLACES=298, PETRI_TRANSITIONS=360} [2024-06-21 16:49:25,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 16:49:25,771 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 360 transitions, 3427 flow [2024-06-21 16:49:25,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:25,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:25,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:25,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:49:25,772 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)] === [2024-06-21 16:49:25,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1751715759, now seen corresponding path program 2 times [2024-06-21 16:49:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:25,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897613806] [2024-06-21 16:49:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:26,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:26,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897613806] [2024-06-21 16:49:26,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897613806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:26,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:26,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:26,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518949391] [2024-06-21 16:49:26,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:26,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:26,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:26,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 360 transitions, 3427 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:26,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:26,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:26,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:27,630 INFO L124 PetriNetUnfolderBase]: 2597/4194 cut-off events. [2024-06-21 16:49:27,630 INFO L125 PetriNetUnfolderBase]: For 745695/745699 co-relation queries the response was YES. [2024-06-21 16:49:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42185 conditions, 4194 events. 2597/4194 cut-off events. For 745695/745699 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24548 event pairs, 632 based on Foata normal form. 6/4198 useless extension candidates. Maximal degree in co-relation 42047. Up to 3885 conditions per place. [2024-06-21 16:49:27,683 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 28 changer transitions 0/390 dead transitions. [2024-06-21 16:49:27,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 390 transitions, 4364 flow [2024-06-21 16:49:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:49:27,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:49:27,685 INFO L175 Difference]: Start difference. First operand has 298 places, 360 transitions, 3427 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:49:27,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 390 transitions, 4364 flow [2024-06-21 16:49:29,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 390 transitions, 4259 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:29,020 INFO L231 Difference]: Finished difference. Result has 301 places, 365 transitions, 3486 flow [2024-06-21 16:49:29,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3486, PETRI_PLACES=301, PETRI_TRANSITIONS=365} [2024-06-21 16:49:29,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 16:49:29,020 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 365 transitions, 3486 flow [2024-06-21 16:49:29,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:29,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:29,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:29,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:49:29,021 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)] === [2024-06-21 16:49:29,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1493437089, now seen corresponding path program 3 times [2024-06-21 16:49:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:29,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658281267] [2024-06-21 16:49:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:29,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:29,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658281267] [2024-06-21 16:49:29,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658281267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:29,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:29,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176906059] [2024-06-21 16:49:29,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 365 transitions, 3486 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:30,866 INFO L124 PetriNetUnfolderBase]: 2605/4206 cut-off events. [2024-06-21 16:49:30,867 INFO L125 PetriNetUnfolderBase]: For 760323/760327 co-relation queries the response was YES. [2024-06-21 16:49:30,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 4206 events. 2605/4206 cut-off events. For 760323/760327 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24608 event pairs, 630 based on Foata normal form. 6/4210 useless extension candidates. Maximal degree in co-relation 42356. Up to 3883 conditions per place. [2024-06-21 16:49:30,922 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 31 changer transitions 0/393 dead transitions. [2024-06-21 16:49:30,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 393 transitions, 4410 flow [2024-06-21 16:49:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:49:30,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:49:30,924 INFO L175 Difference]: Start difference. First operand has 301 places, 365 transitions, 3486 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:49:30,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 393 transitions, 4410 flow [2024-06-21 16:49:32,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 393 transitions, 4297 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:32,392 INFO L231 Difference]: Finished difference. Result has 304 places, 367 transitions, 3512 flow [2024-06-21 16:49:32,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3512, PETRI_PLACES=304, PETRI_TRANSITIONS=367} [2024-06-21 16:49:32,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 16:49:32,392 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 367 transitions, 3512 flow [2024-06-21 16:49:32,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:32,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:32,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:32,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:49:32,393 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)] === [2024-06-21 16:49:32,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:32,394 INFO L85 PathProgramCache]: Analyzing trace with hash -844218753, now seen corresponding path program 1 times [2024-06-21 16:49:32,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:32,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100336405] [2024-06-21 16:49:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:33,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100336405] [2024-06-21 16:49:33,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100336405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:33,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:33,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:33,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366930804] [2024-06-21 16:49:33,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:33,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:33,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:33,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:49:33,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 367 transitions, 3512 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:33,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:33,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:49:33,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:34,362 INFO L124 PetriNetUnfolderBase]: 2534/4137 cut-off events. [2024-06-21 16:49:34,363 INFO L125 PetriNetUnfolderBase]: For 771955/771959 co-relation queries the response was YES. [2024-06-21 16:49:34,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42381 conditions, 4137 events. 2534/4137 cut-off events. For 771955/771959 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24652 event pairs, 601 based on Foata normal form. 5/4128 useless extension candidates. Maximal degree in co-relation 42240. Up to 3661 conditions per place. [2024-06-21 16:49:34,418 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 34 changer transitions 0/400 dead transitions. [2024-06-21 16:49:34,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 400 transitions, 4488 flow [2024-06-21 16:49:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:49:34,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 16:49:34,419 INFO L175 Difference]: Start difference. First operand has 304 places, 367 transitions, 3512 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:49:34,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 400 transitions, 4488 flow [2024-06-21 16:49:35,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 400 transitions, 4365 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:35,708 INFO L231 Difference]: Finished difference. Result has 306 places, 370 transitions, 3616 flow [2024-06-21 16:49:35,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3616, PETRI_PLACES=306, PETRI_TRANSITIONS=370} [2024-06-21 16:49:35,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 16:49:35,709 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 370 transitions, 3616 flow [2024-06-21 16:49:35,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:35,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:35,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:49:35,709 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)] === [2024-06-21 16:49:35,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1670476353, now seen corresponding path program 1 times [2024-06-21 16:49:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872579529] [2024-06-21 16:49:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:36,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872579529] [2024-06-21 16:49:36,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872579529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:36,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:36,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:36,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564251368] [2024-06-21 16:49:36,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:36,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:36,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:36,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:36,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 370 transitions, 3616 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:36,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:36,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:36,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:37,407 INFO L124 PetriNetUnfolderBase]: 2620/4227 cut-off events. [2024-06-21 16:49:37,407 INFO L125 PetriNetUnfolderBase]: For 794921/794925 co-relation queries the response was YES. [2024-06-21 16:49:37,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43444 conditions, 4227 events. 2620/4227 cut-off events. For 794921/794925 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24728 event pairs, 630 based on Foata normal form. 6/4231 useless extension candidates. Maximal degree in co-relation 43302. Up to 3895 conditions per place. [2024-06-21 16:49:37,464 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 31 changer transitions 0/402 dead transitions. [2024-06-21 16:49:37,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 402 transitions, 4640 flow [2024-06-21 16:49:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:49:37,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:49:37,466 INFO L175 Difference]: Start difference. First operand has 306 places, 370 transitions, 3616 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:49:37,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 402 transitions, 4640 flow [2024-06-21 16:49:38,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 402 transitions, 4431 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:38,867 INFO L231 Difference]: Finished difference. Result has 308 places, 373 transitions, 3601 flow [2024-06-21 16:49:38,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3601, PETRI_PLACES=308, PETRI_TRANSITIONS=373} [2024-06-21 16:49:38,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 16:49:38,868 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 373 transitions, 3601 flow [2024-06-21 16:49:38,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:38,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:38,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:49:38,868 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)] === [2024-06-21 16:49:38,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1493344833, now seen corresponding path program 2 times [2024-06-21 16:49:38,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840532807] [2024-06-21 16:49:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:39,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840532807] [2024-06-21 16:49:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840532807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:39,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710588022] [2024-06-21 16:49:39,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:39,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:39,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:39,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 373 transitions, 3601 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:39,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:39,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:39,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:40,802 INFO L124 PetriNetUnfolderBase]: 2646/4265 cut-off events. [2024-06-21 16:49:40,803 INFO L125 PetriNetUnfolderBase]: For 829127/829131 co-relation queries the response was YES. [2024-06-21 16:49:40,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44599 conditions, 4265 events. 2646/4265 cut-off events. For 829127/829131 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25015 event pairs, 633 based on Foata normal form. 6/4269 useless extension candidates. Maximal degree in co-relation 44456. Up to 3898 conditions per place. [2024-06-21 16:49:40,857 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 44 changer transitions 0/411 dead transitions. [2024-06-21 16:49:40,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 411 transitions, 4991 flow [2024-06-21 16:49:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:49:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:49:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 16:49:40,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 16:49:40,860 INFO L175 Difference]: Start difference. First operand has 308 places, 373 transitions, 3601 flow. Second operand 10 states and 183 transitions. [2024-06-21 16:49:40,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 411 transitions, 4991 flow [2024-06-21 16:49:42,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 411 transitions, 4819 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:42,257 INFO L231 Difference]: Finished difference. Result has 311 places, 379 transitions, 3781 flow [2024-06-21 16:49:42,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3781, PETRI_PLACES=311, PETRI_TRANSITIONS=379} [2024-06-21 16:49:42,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 16:49:42,258 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 379 transitions, 3781 flow [2024-06-21 16:49:42,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:42,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:42,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:42,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:49:42,258 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)] === [2024-06-21 16:49:42,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1493107683, now seen corresponding path program 3 times [2024-06-21 16:49:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:42,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14947140] [2024-06-21 16:49:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:42,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14947140] [2024-06-21 16:49:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14947140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:43,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:43,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444080030] [2024-06-21 16:49:43,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:43,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:43,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 379 transitions, 3781 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:43,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:43,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:43,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:44,132 INFO L124 PetriNetUnfolderBase]: 2640/4257 cut-off events. [2024-06-21 16:49:44,132 INFO L125 PetriNetUnfolderBase]: For 840522/840526 co-relation queries the response was YES. [2024-06-21 16:49:44,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44707 conditions, 4257 events. 2640/4257 cut-off events. For 840522/840526 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24954 event pairs, 630 based on Foata normal form. 6/4261 useless extension candidates. Maximal degree in co-relation 44563. Up to 3893 conditions per place. [2024-06-21 16:49:44,191 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 45 changer transitions 0/410 dead transitions. [2024-06-21 16:49:44,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 410 transitions, 4715 flow [2024-06-21 16:49:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:49:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:49:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 16:49:44,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 16:49:44,193 INFO L175 Difference]: Start difference. First operand has 311 places, 379 transitions, 3781 flow. Second operand 10 states and 181 transitions. [2024-06-21 16:49:44,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 410 transitions, 4715 flow [2024-06-21 16:49:45,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 410 transitions, 4436 flow, removed 116 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:45,639 INFO L231 Difference]: Finished difference. Result has 315 places, 379 transitions, 3598 flow [2024-06-21 16:49:45,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3598, PETRI_PLACES=315, PETRI_TRANSITIONS=379} [2024-06-21 16:49:45,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 16:49:45,640 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 379 transitions, 3598 flow [2024-06-21 16:49:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:45,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:45,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:49:45,641 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)] === [2024-06-21 16:49:45,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 637858323, now seen corresponding path program 4 times [2024-06-21 16:49:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696995335] [2024-06-21 16:49:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:46,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:46,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696995335] [2024-06-21 16:49:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696995335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:46,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:46,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:46,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562993648] [2024-06-21 16:49:46,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:46,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:46,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:46,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:46,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 379 transitions, 3598 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:46,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:46,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:47,502 INFO L124 PetriNetUnfolderBase]: 2653/4276 cut-off events. [2024-06-21 16:49:47,502 INFO L125 PetriNetUnfolderBase]: For 852675/852677 co-relation queries the response was YES. [2024-06-21 16:49:47,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44846 conditions, 4276 events. 2653/4276 cut-off events. For 852675/852677 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25092 event pairs, 640 based on Foata normal form. 2/4276 useless extension candidates. Maximal degree in co-relation 44700. Up to 3948 conditions per place. [2024-06-21 16:49:47,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 39 changer transitions 0/402 dead transitions. [2024-06-21 16:49:47,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 402 transitions, 4549 flow [2024-06-21 16:49:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:49:47,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:49:47,565 INFO L175 Difference]: Start difference. First operand has 315 places, 379 transitions, 3598 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:49:47,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 402 transitions, 4549 flow [2024-06-21 16:49:49,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 402 transitions, 4447 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:49:49,199 INFO L231 Difference]: Finished difference. Result has 315 places, 384 transitions, 3690 flow [2024-06-21 16:49:49,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3690, PETRI_PLACES=315, PETRI_TRANSITIONS=384} [2024-06-21 16:49:49,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 16:49:49,200 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 384 transitions, 3690 flow [2024-06-21 16:49:49,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:49,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:49,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:49,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:49:49,201 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)] === [2024-06-21 16:49:49,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 637531893, now seen corresponding path program 5 times [2024-06-21 16:49:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213513764] [2024-06-21 16:49:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213513764] [2024-06-21 16:49:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213513764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:49,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990062891] [2024-06-21 16:49:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:50,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:50,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 384 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:50,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:50,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:50,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:51,023 INFO L124 PetriNetUnfolderBase]: 2674/4307 cut-off events. [2024-06-21 16:49:51,023 INFO L125 PetriNetUnfolderBase]: For 880577/880579 co-relation queries the response was YES. [2024-06-21 16:49:51,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45692 conditions, 4307 events. 2674/4307 cut-off events. For 880577/880579 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25294 event pairs, 639 based on Foata normal form. 2/4307 useless extension candidates. Maximal degree in co-relation 45545. Up to 3956 conditions per place. [2024-06-21 16:49:51,086 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 44 changer transitions 0/408 dead transitions. [2024-06-21 16:49:51,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 408 transitions, 4916 flow [2024-06-21 16:49:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:49:51,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:49:51,087 INFO L175 Difference]: Start difference. First operand has 315 places, 384 transitions, 3690 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:49:51,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 408 transitions, 4916 flow [2024-06-21 16:49:52,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 408 transitions, 4752 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:52,783 INFO L231 Difference]: Finished difference. Result has 318 places, 388 transitions, 3783 flow [2024-06-21 16:49:52,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3783, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2024-06-21 16:49:52,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 16:49:52,784 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 3783 flow [2024-06-21 16:49:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:52,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:52,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:52,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:49:52,784 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)] === [2024-06-21 16:49:52,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1178813261, now seen corresponding path program 6 times [2024-06-21 16:49:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:52,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246227040] [2024-06-21 16:49:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:52,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:53,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:53,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246227040] [2024-06-21 16:49:53,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246227040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:53,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:53,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647497670] [2024-06-21 16:49:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:53,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:53,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:49:53,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 3783 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:53,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:53,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:49:53,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:54,817 INFO L124 PetriNetUnfolderBase]: 2669/4300 cut-off events. [2024-06-21 16:49:54,818 INFO L125 PetriNetUnfolderBase]: For 885040/885042 co-relation queries the response was YES. [2024-06-21 16:49:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45488 conditions, 4300 events. 2669/4300 cut-off events. For 885040/885042 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25242 event pairs, 640 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 45342. Up to 3972 conditions per place. [2024-06-21 16:49:54,872 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 40 changer transitions 0/406 dead transitions. [2024-06-21 16:49:54,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 406 transitions, 4635 flow [2024-06-21 16:49:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 16:49:54,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 16:49:54,873 INFO L175 Difference]: Start difference. First operand has 318 places, 388 transitions, 3783 flow. Second operand 9 states and 156 transitions. [2024-06-21 16:49:54,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 406 transitions, 4635 flow [2024-06-21 16:49:56,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 4444 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-21 16:49:56,531 INFO L231 Difference]: Finished difference. Result has 322 places, 388 transitions, 3677 flow [2024-06-21 16:49:56,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3677, PETRI_PLACES=322, PETRI_TRANSITIONS=388} [2024-06-21 16:49:56,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 16:49:56,532 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 388 transitions, 3677 flow [2024-06-21 16:49:56,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:56,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:56,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:56,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:49:56,532 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)] === [2024-06-21 16:49:56,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1908792141, now seen corresponding path program 2 times [2024-06-21 16:49:56,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:56,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822646708] [2024-06-21 16:49:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:56,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:57,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822646708] [2024-06-21 16:49:57,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822646708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:57,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:57,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:57,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855324138] [2024-06-21 16:49:57,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:57,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:57,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:57,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:57,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:49:57,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 388 transitions, 3677 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:57,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:57,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:49:57,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:58,347 INFO L124 PetriNetUnfolderBase]: 2603/4248 cut-off events. [2024-06-21 16:49:58,347 INFO L125 PetriNetUnfolderBase]: For 895519/895524 co-relation queries the response was YES. [2024-06-21 16:49:58,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45219 conditions, 4248 events. 2603/4248 cut-off events. For 895519/895524 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25457 event pairs, 618 based on Foata normal form. 1/4233 useless extension candidates. Maximal degree in co-relation 45071. Up to 3618 conditions per place. [2024-06-21 16:49:58,406 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 63 changer transitions 0/420 dead transitions. [2024-06-21 16:49:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 420 transitions, 4701 flow [2024-06-21 16:49:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:49:58,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 16:49:58,407 INFO L175 Difference]: Start difference. First operand has 322 places, 388 transitions, 3677 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:49:58,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 420 transitions, 4701 flow [2024-06-21 16:49:59,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 420 transitions, 4603 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:49:59,846 INFO L231 Difference]: Finished difference. Result has 323 places, 394 transitions, 3903 flow [2024-06-21 16:49:59,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3903, PETRI_PLACES=323, PETRI_TRANSITIONS=394} [2024-06-21 16:49:59,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 16:49:59,846 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 394 transitions, 3903 flow [2024-06-21 16:49:59,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:59,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:59,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:59,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:49:59,847 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)] === [2024-06-21 16:49:59,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1909090671, now seen corresponding path program 3 times [2024-06-21 16:49:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:59,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596223725] [2024-06-21 16:49:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:59,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:00,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:00,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596223725] [2024-06-21 16:50:00,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596223725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:00,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:00,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155670431] [2024-06-21 16:50:00,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:00,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:00,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:00,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:50:00,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 394 transitions, 3903 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:00,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:00,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:50:00,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:01,682 INFO L124 PetriNetUnfolderBase]: 2616/4266 cut-off events. [2024-06-21 16:50:01,683 INFO L125 PetriNetUnfolderBase]: For 927589/927594 co-relation queries the response was YES. [2024-06-21 16:50:01,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46399 conditions, 4266 events. 2616/4266 cut-off events. For 927589/927594 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25537 event pairs, 618 based on Foata normal form. 1/4251 useless extension candidates. Maximal degree in co-relation 46250. Up to 3621 conditions per place. [2024-06-21 16:50:01,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 74 changer transitions 0/424 dead transitions. [2024-06-21 16:50:01,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 424 transitions, 5285 flow [2024-06-21 16:50:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:50:01,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 16:50:01,744 INFO L175 Difference]: Start difference. First operand has 323 places, 394 transitions, 3903 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:50:01,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 424 transitions, 5285 flow [2024-06-21 16:50:03,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 424 transitions, 5011 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:03,736 INFO L231 Difference]: Finished difference. Result has 326 places, 400 transitions, 4121 flow [2024-06-21 16:50:03,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4121, PETRI_PLACES=326, PETRI_TRANSITIONS=400} [2024-06-21 16:50:03,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 16:50:03,737 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 400 transitions, 4121 flow [2024-06-21 16:50:03,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:03,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:03,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:03,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:50:03,737 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)] === [2024-06-21 16:50:03,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1909091043, now seen corresponding path program 1 times [2024-06-21 16:50:03,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:03,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497427960] [2024-06-21 16:50:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497427960] [2024-06-21 16:50:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497427960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:04,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:04,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28831211] [2024-06-21 16:50:04,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:04,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:04,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:04,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 400 transitions, 4121 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:04,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:04,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:04,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:05,613 INFO L124 PetriNetUnfolderBase]: 2703/4357 cut-off events. [2024-06-21 16:50:05,614 INFO L125 PetriNetUnfolderBase]: For 947108/947115 co-relation queries the response was YES. [2024-06-21 16:50:05,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47416 conditions, 4357 events. 2703/4357 cut-off events. For 947108/947115 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25651 event pairs, 643 based on Foata normal form. 5/4358 useless extension candidates. Maximal degree in co-relation 47266. Up to 4010 conditions per place. [2024-06-21 16:50:05,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 35 changer transitions 0/428 dead transitions. [2024-06-21 16:50:05,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 428 transitions, 5171 flow [2024-06-21 16:50:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:50:05,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:50:05,680 INFO L175 Difference]: Start difference. First operand has 326 places, 400 transitions, 4121 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:50:05,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 428 transitions, 5171 flow [2024-06-21 16:50:07,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 428 transitions, 4908 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:07,798 INFO L231 Difference]: Finished difference. Result has 330 places, 403 transitions, 4064 flow [2024-06-21 16:50:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4064, PETRI_PLACES=330, PETRI_TRANSITIONS=403} [2024-06-21 16:50:07,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 16:50:07,799 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 403 transitions, 4064 flow [2024-06-21 16:50:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:07,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:07,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:50:07,799 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)] === [2024-06-21 16:50:07,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1903429761, now seen corresponding path program 4 times [2024-06-21 16:50:07,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302860905] [2024-06-21 16:50:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302860905] [2024-06-21 16:50:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302860905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:08,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:08,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733913752] [2024-06-21 16:50:08,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:08,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:50:08,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 403 transitions, 4064 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:08,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:08,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:50:08,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:09,768 INFO L124 PetriNetUnfolderBase]: 2618/4269 cut-off events. [2024-06-21 16:50:09,769 INFO L125 PetriNetUnfolderBase]: For 960061/960066 co-relation queries the response was YES. [2024-06-21 16:50:09,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47085 conditions, 4269 events. 2618/4269 cut-off events. For 960061/960066 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25535 event pairs, 617 based on Foata normal form. 1/4254 useless extension candidates. Maximal degree in co-relation 46933. Up to 3637 conditions per place. [2024-06-21 16:50:09,824 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 62 changer transitions 0/429 dead transitions. [2024-06-21 16:50:09,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 429 transitions, 4918 flow [2024-06-21 16:50:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:50:09,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 16:50:09,825 INFO L175 Difference]: Start difference. First operand has 330 places, 403 transitions, 4064 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:50:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 429 transitions, 4918 flow [2024-06-21 16:50:12,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 429 transitions, 4626 flow, removed 113 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:12,446 INFO L231 Difference]: Finished difference. Result has 332 places, 403 transitions, 3902 flow [2024-06-21 16:50:12,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3902, PETRI_PLACES=332, PETRI_TRANSITIONS=403} [2024-06-21 16:50:12,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 16:50:12,446 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 403 transitions, 3902 flow [2024-06-21 16:50:12,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:12,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:12,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:50:12,447 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)] === [2024-06-21 16:50:12,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1903549917, now seen corresponding path program 4 times [2024-06-21 16:50:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:12,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898001672] [2024-06-21 16:50:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:13,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:13,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898001672] [2024-06-21 16:50:13,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898001672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:13,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:13,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:13,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534797493] [2024-06-21 16:50:13,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:13,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:13,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:13,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:13,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 403 transitions, 3902 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:13,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:13,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:13,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:14,169 INFO L124 PetriNetUnfolderBase]: 2710/4368 cut-off events. [2024-06-21 16:50:14,170 INFO L125 PetriNetUnfolderBase]: For 980628/980633 co-relation queries the response was YES. [2024-06-21 16:50:14,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47858 conditions, 4368 events. 2710/4368 cut-off events. For 980628/980633 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25796 event pairs, 643 based on Foata normal form. 4/4369 useless extension candidates. Maximal degree in co-relation 47705. Up to 3976 conditions per place. [2024-06-21 16:50:14,235 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 384 selfloop transitions, 42 changer transitions 0/431 dead transitions. [2024-06-21 16:50:14,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 431 transitions, 4994 flow [2024-06-21 16:50:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:50:14,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:50:14,237 INFO L175 Difference]: Start difference. First operand has 332 places, 403 transitions, 3902 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:50:14,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 431 transitions, 4994 flow [2024-06-21 16:50:16,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 4816 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:50:16,342 INFO L231 Difference]: Finished difference. Result has 332 places, 406 transitions, 3968 flow [2024-06-21 16:50:16,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3968, PETRI_PLACES=332, PETRI_TRANSITIONS=406} [2024-06-21 16:50:16,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 16:50:16,343 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 406 transitions, 3968 flow [2024-06-21 16:50:16,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:16,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:16,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:16,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:50:16,344 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)] === [2024-06-21 16:50:16,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash -314712134, now seen corresponding path program 1 times [2024-06-21 16:50:16,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:16,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673585966] [2024-06-21 16:50:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:16,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:17,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:17,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673585966] [2024-06-21 16:50:17,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673585966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:17,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:17,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215719281] [2024-06-21 16:50:17,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:17,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:17,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:17,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:17,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:17,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 406 transitions, 3968 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:17,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:17,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:17,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:18,274 INFO L124 PetriNetUnfolderBase]: 2720/4384 cut-off events. [2024-06-21 16:50:18,274 INFO L125 PetriNetUnfolderBase]: For 1003966/1003973 co-relation queries the response was YES. [2024-06-21 16:50:18,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48459 conditions, 4384 events. 2720/4384 cut-off events. For 1003966/1003973 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25889 event pairs, 636 based on Foata normal form. 8/4389 useless extension candidates. Maximal degree in co-relation 48305. Up to 4054 conditions per place. [2024-06-21 16:50:18,336 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 28 changer transitions 0/434 dead transitions. [2024-06-21 16:50:18,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 434 transitions, 5036 flow [2024-06-21 16:50:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:50:18,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:50:18,337 INFO L175 Difference]: Start difference. First operand has 332 places, 406 transitions, 3968 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:50:18,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 434 transitions, 5036 flow [2024-06-21 16:50:20,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 434 transitions, 4814 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:20,859 INFO L231 Difference]: Finished difference. Result has 334 places, 409 transitions, 3918 flow [2024-06-21 16:50:20,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3918, PETRI_PLACES=334, PETRI_TRANSITIONS=409} [2024-06-21 16:50:20,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 16:50:20,860 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 409 transitions, 3918 flow [2024-06-21 16:50:20,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:20,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:20,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:20,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:50:20,860 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)] === [2024-06-21 16:50:20,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1912815507, now seen corresponding path program 5 times [2024-06-21 16:50:20,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:20,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193240947] [2024-06-21 16:50:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:20,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:21,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:21,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193240947] [2024-06-21 16:50:21,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193240947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:21,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:21,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:21,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544342829] [2024-06-21 16:50:21,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:21,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:21,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:21,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:21,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 409 transitions, 3918 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:21,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:21,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:21,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:22,685 INFO L124 PetriNetUnfolderBase]: 2746/4422 cut-off events. [2024-06-21 16:50:22,685 INFO L125 PetriNetUnfolderBase]: For 1025491/1025496 co-relation queries the response was YES. [2024-06-21 16:50:22,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49586 conditions, 4422 events. 2746/4422 cut-off events. For 1025491/1025496 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26041 event pairs, 638 based on Foata normal form. 4/4423 useless extension candidates. Maximal degree in co-relation 49431. Up to 3969 conditions per place. [2024-06-21 16:50:22,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 61 changer transitions 0/439 dead transitions. [2024-06-21 16:50:22,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 439 transitions, 5416 flow [2024-06-21 16:50:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:50:22,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:50:22,753 INFO L175 Difference]: Start difference. First operand has 334 places, 409 transitions, 3918 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:50:22,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 439 transitions, 5416 flow [2024-06-21 16:50:25,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 439 transitions, 5266 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:25,455 INFO L231 Difference]: Finished difference. Result has 336 places, 415 transitions, 4214 flow [2024-06-21 16:50:25,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=336, PETRI_TRANSITIONS=415} [2024-06-21 16:50:25,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 16:50:25,456 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 415 transitions, 4214 flow [2024-06-21 16:50:25,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:25,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:25,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:25,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:50:25,457 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)] === [2024-06-21 16:50:25,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash -140093593, now seen corresponding path program 6 times [2024-06-21 16:50:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918623425] [2024-06-21 16:50:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918623425] [2024-06-21 16:50:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918623425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:26,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:26,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053669389] [2024-06-21 16:50:26,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:26,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:26,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:26,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:26,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 415 transitions, 4214 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:26,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:26,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:26,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:27,400 INFO L124 PetriNetUnfolderBase]: 2740/4416 cut-off events. [2024-06-21 16:50:27,400 INFO L125 PetriNetUnfolderBase]: For 1036892/1036897 co-relation queries the response was YES. [2024-06-21 16:50:27,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 4416 events. 2740/4416 cut-off events. For 1036892/1036897 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26073 event pairs, 642 based on Foata normal form. 4/4417 useless extension candidates. Maximal degree in co-relation 49623. Up to 3964 conditions per place. [2024-06-21 16:50:27,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 374 selfloop transitions, 59 changer transitions 0/438 dead transitions. [2024-06-21 16:50:27,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 438 transitions, 5174 flow [2024-06-21 16:50:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:50:27,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:50:27,471 INFO L175 Difference]: Start difference. First operand has 336 places, 415 transitions, 4214 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:50:27,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 438 transitions, 5174 flow [2024-06-21 16:50:30,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 438 transitions, 4842 flow, removed 137 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:30,416 INFO L231 Difference]: Finished difference. Result has 340 places, 415 transitions, 4006 flow [2024-06-21 16:50:30,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4006, PETRI_PLACES=340, PETRI_TRANSITIONS=415} [2024-06-21 16:50:30,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-21 16:50:30,417 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 415 transitions, 4006 flow [2024-06-21 16:50:30,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:30,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:30,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:30,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:50:30,417 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)] === [2024-06-21 16:50:30,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1186053125, now seen corresponding path program 7 times [2024-06-21 16:50:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:30,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438863659] [2024-06-21 16:50:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:30,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438863659] [2024-06-21 16:50:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438863659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:31,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345770332] [2024-06-21 16:50:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:31,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:31,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:31,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 415 transitions, 4006 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:31,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:31,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:31,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:32,268 INFO L124 PetriNetUnfolderBase]: 2798/4507 cut-off events. [2024-06-21 16:50:32,269 INFO L125 PetriNetUnfolderBase]: For 1098255/1098260 co-relation queries the response was YES. [2024-06-21 16:50:32,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51912 conditions, 4507 events. 2798/4507 cut-off events. For 1098255/1098260 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 26687 event pairs, 653 based on Foata normal form. 4/4508 useless extension candidates. Maximal degree in co-relation 51754. Up to 3878 conditions per place. [2024-06-21 16:50:32,331 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 107 changer transitions 0/451 dead transitions. [2024-06-21 16:50:32,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 451 transitions, 6326 flow [2024-06-21 16:50:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:50:32,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 16:50:32,348 INFO L175 Difference]: Start difference. First operand has 340 places, 415 transitions, 4006 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:50:32,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 451 transitions, 6326 flow [2024-06-21 16:50:34,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6170 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:50:34,813 INFO L231 Difference]: Finished difference. Result has 341 places, 427 transitions, 4724 flow [2024-06-21 16:50:34,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3850, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4724, PETRI_PLACES=341, PETRI_TRANSITIONS=427} [2024-06-21 16:50:34,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 16:50:34,814 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 427 transitions, 4724 flow [2024-06-21 16:50:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:34,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:34,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:34,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:50:34,814 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)] === [2024-06-21 16:50:34,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:34,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1186041562, now seen corresponding path program 2 times [2024-06-21 16:50:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:34,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206311859] [2024-06-21 16:50:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:35,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206311859] [2024-06-21 16:50:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206311859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:35,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:35,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718028083] [2024-06-21 16:50:35,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:35,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:35,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:35,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 427 transitions, 4724 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:36,856 INFO L124 PetriNetUnfolderBase]: 2840/4564 cut-off events. [2024-06-21 16:50:36,856 INFO L125 PetriNetUnfolderBase]: For 1156215/1156222 co-relation queries the response was YES. [2024-06-21 16:50:36,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53733 conditions, 4564 events. 2840/4564 cut-off events. For 1156215/1156222 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26963 event pairs, 649 based on Foata normal form. 8/4569 useless extension candidates. Maximal degree in co-relation 53574. Up to 4143 conditions per place. [2024-06-21 16:50:36,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 51 changer transitions 0/463 dead transitions. [2024-06-21 16:50:36,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 463 transitions, 6563 flow [2024-06-21 16:50:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:50:36,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:50:36,922 INFO L175 Difference]: Start difference. First operand has 341 places, 427 transitions, 4724 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:50:36,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 463 transitions, 6563 flow [2024-06-21 16:50:39,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 463 transitions, 6252 flow, removed 139 selfloop flow, removed 3 redundant places. [2024-06-21 16:50:39,672 INFO L231 Difference]: Finished difference. Result has 348 places, 438 transitions, 4910 flow [2024-06-21 16:50:39,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4910, PETRI_PLACES=348, PETRI_TRANSITIONS=438} [2024-06-21 16:50:39,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 16:50:39,673 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 438 transitions, 4910 flow [2024-06-21 16:50:39,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:39,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:39,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:39,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:50:39,674 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)] === [2024-06-21 16:50:39,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1178810285, now seen corresponding path program 8 times [2024-06-21 16:50:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:39,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603232745] [2024-06-21 16:50:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603232745] [2024-06-21 16:50:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603232745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:40,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:40,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069167132] [2024-06-21 16:50:40,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:40,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:40,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 438 transitions, 4910 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:40,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:40,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:40,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:41,653 INFO L124 PetriNetUnfolderBase]: 2850/4573 cut-off events. [2024-06-21 16:50:41,653 INFO L125 PetriNetUnfolderBase]: For 1156264/1156266 co-relation queries the response was YES. [2024-06-21 16:50:41,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53434 conditions, 4573 events. 2850/4573 cut-off events. For 1156264/1156266 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26990 event pairs, 663 based on Foata normal form. 2/4573 useless extension candidates. Maximal degree in co-relation 53272. Up to 4224 conditions per place. [2024-06-21 16:50:41,725 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 41 changer transitions 0/459 dead transitions. [2024-06-21 16:50:41,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 459 transitions, 6012 flow [2024-06-21 16:50:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:50:41,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:50:41,727 INFO L175 Difference]: Start difference. First operand has 348 places, 438 transitions, 4910 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:50:41,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 459 transitions, 6012 flow [2024-06-21 16:50:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 459 transitions, 5846 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:44,661 INFO L231 Difference]: Finished difference. Result has 353 places, 441 transitions, 4972 flow [2024-06-21 16:50:44,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4972, PETRI_PLACES=353, PETRI_TRANSITIONS=441} [2024-06-21 16:50:44,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 16:50:44,661 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 441 transitions, 4972 flow [2024-06-21 16:50:44,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:44,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:44,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:44,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:50:44,662 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)] === [2024-06-21 16:50:44,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash -352160566, now seen corresponding path program 3 times [2024-06-21 16:50:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659149056] [2024-06-21 16:50:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:45,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659149056] [2024-06-21 16:50:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659149056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:45,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:45,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:45,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988215052] [2024-06-21 16:50:45,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:45,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:45,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:45,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 441 transitions, 4972 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:46,602 INFO L124 PetriNetUnfolderBase]: 2860/4590 cut-off events. [2024-06-21 16:50:46,603 INFO L125 PetriNetUnfolderBase]: For 1172474/1172481 co-relation queries the response was YES. [2024-06-21 16:50:46,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53657 conditions, 4590 events. 2860/4590 cut-off events. For 1172474/1172481 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 27096 event pairs, 639 based on Foata normal form. 8/4595 useless extension candidates. Maximal degree in co-relation 53493. Up to 4167 conditions per place. [2024-06-21 16:50:46,674 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 59 changer transitions 0/468 dead transitions. [2024-06-21 16:50:46,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 468 transitions, 6336 flow [2024-06-21 16:50:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:50:46,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:50:46,675 INFO L175 Difference]: Start difference. First operand has 353 places, 441 transitions, 4972 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:50:46,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 468 transitions, 6336 flow [2024-06-21 16:50:49,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 468 transitions, 6136 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:49,698 INFO L231 Difference]: Finished difference. Result has 355 places, 444 transitions, 4992 flow [2024-06-21 16:50:49,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4992, PETRI_PLACES=355, PETRI_TRANSITIONS=444} [2024-06-21 16:50:49,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 16:50:49,699 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 444 transitions, 4992 flow [2024-06-21 16:50:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:49,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:49,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:50:49,700 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)] === [2024-06-21 16:50:49,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1607688136, now seen corresponding path program 4 times [2024-06-21 16:50:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:49,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950896237] [2024-06-21 16:50:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:50,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950896237] [2024-06-21 16:50:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950896237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:50,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631385446] [2024-06-21 16:50:50,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:50,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:50,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:50,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 444 transitions, 4992 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:50,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:50,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:50,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:51,593 INFO L124 PetriNetUnfolderBase]: 2854/4582 cut-off events. [2024-06-21 16:50:51,593 INFO L125 PetriNetUnfolderBase]: For 1174321/1174328 co-relation queries the response was YES. [2024-06-21 16:50:51,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53406 conditions, 4582 events. 2854/4582 cut-off events. For 1174321/1174328 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27062 event pairs, 639 based on Foata normal form. 8/4587 useless extension candidates. Maximal degree in co-relation 53241. Up to 4162 conditions per place. [2024-06-21 16:50:51,665 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 56 changer transitions 0/468 dead transitions. [2024-06-21 16:50:51,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 468 transitions, 6262 flow [2024-06-21 16:50:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:50:51,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:50:51,666 INFO L175 Difference]: Start difference. First operand has 355 places, 444 transitions, 4992 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:50:51,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 468 transitions, 6262 flow [2024-06-21 16:50:54,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 468 transitions, 5987 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:54,909 INFO L231 Difference]: Finished difference. Result has 358 places, 444 transitions, 4835 flow [2024-06-21 16:50:54,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4835, PETRI_PLACES=358, PETRI_TRANSITIONS=444} [2024-06-21 16:50:54,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 16:50:54,910 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 444 transitions, 4835 flow [2024-06-21 16:50:54,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:54,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:54,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:54,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:50:54,911 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)] === [2024-06-21 16:50:54,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 648706029, now seen corresponding path program 9 times [2024-06-21 16:50:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958521625] [2024-06-21 16:50:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:55,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958521625] [2024-06-21 16:50:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958521625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:55,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:55,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671770526] [2024-06-21 16:50:55,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:55,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:50:55,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 444 transitions, 4835 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:55,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:55,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:50:55,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:56,861 INFO L124 PetriNetUnfolderBase]: 2880/4631 cut-off events. [2024-06-21 16:50:56,861 INFO L125 PetriNetUnfolderBase]: For 1207453/1207458 co-relation queries the response was YES. [2024-06-21 16:50:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54162 conditions, 4631 events. 2880/4631 cut-off events. For 1207453/1207458 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27530 event pairs, 637 based on Foata normal form. 4/4632 useless extension candidates. Maximal degree in co-relation 53996. Up to 3977 conditions per place. [2024-06-21 16:50:56,933 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 344 selfloop transitions, 124 changer transitions 0/473 dead transitions. [2024-06-21 16:50:56,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 473 transitions, 6605 flow [2024-06-21 16:50:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:50:56,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:50:56,934 INFO L175 Difference]: Start difference. First operand has 358 places, 444 transitions, 4835 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:50:56,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 473 transitions, 6605 flow [2024-06-21 16:51:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 473 transitions, 6506 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:00,139 INFO L231 Difference]: Finished difference. Result has 360 places, 450 transitions, 5252 flow [2024-06-21 16:51:00,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5252, PETRI_PLACES=360, PETRI_TRANSITIONS=450} [2024-06-21 16:51:00,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 16:51:00,140 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 450 transitions, 5252 flow [2024-06-21 16:51:00,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:00,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:00,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:00,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:51:00,140 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)] === [2024-06-21 16:51:00,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1600336083, now seen corresponding path program 10 times [2024-06-21 16:51:00,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:00,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221490879] [2024-06-21 16:51:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:00,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:00,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:00,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221490879] [2024-06-21 16:51:00,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221490879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:00,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:00,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210563153] [2024-06-21 16:51:00,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:00,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:01,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:01,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 450 transitions, 5252 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:01,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:01,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:01,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:02,066 INFO L124 PetriNetUnfolderBase]: 2874/4623 cut-off events. [2024-06-21 16:51:02,066 INFO L125 PetriNetUnfolderBase]: For 1212091/1212096 co-relation queries the response was YES. [2024-06-21 16:51:02,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54217 conditions, 4623 events. 2874/4623 cut-off events. For 1212091/1212096 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27459 event pairs, 654 based on Foata normal form. 4/4624 useless extension candidates. Maximal degree in co-relation 54050. Up to 3972 conditions per place. [2024-06-21 16:51:02,141 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 117 changer transitions 0/474 dead transitions. [2024-06-21 16:51:02,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 474 transitions, 7006 flow [2024-06-21 16:51:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:51:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 16:51:02,142 INFO L175 Difference]: Start difference. First operand has 360 places, 450 transitions, 5252 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:51:02,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 474 transitions, 7006 flow [2024-06-21 16:51:05,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 474 transitions, 6598 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:05,944 INFO L231 Difference]: Finished difference. Result has 364 places, 450 transitions, 5084 flow [2024-06-21 16:51:05,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5084, PETRI_PLACES=364, PETRI_TRANSITIONS=450} [2024-06-21 16:51:05,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 16:51:05,945 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 450 transitions, 5084 flow [2024-06-21 16:51:05,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:05,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:05,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:51:05,946 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)] === [2024-06-21 16:51:05,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1596605853, now seen corresponding path program 11 times [2024-06-21 16:51:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840647063] [2024-06-21 16:51:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:05,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840647063] [2024-06-21 16:51:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840647063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:06,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619323619] [2024-06-21 16:51:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:06,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:06,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 450 transitions, 5084 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:06,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:06,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:06,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:07,875 INFO L124 PetriNetUnfolderBase]: 2868/4605 cut-off events. [2024-06-21 16:51:07,875 INFO L125 PetriNetUnfolderBase]: For 1211801/1211803 co-relation queries the response was YES. [2024-06-21 16:51:07,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53667 conditions, 4605 events. 2868/4605 cut-off events. For 1211801/1211803 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27227 event pairs, 663 based on Foata normal form. 2/4605 useless extension candidates. Maximal degree in co-relation 53499. Up to 4227 conditions per place. [2024-06-21 16:51:07,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 48 changer transitions 0/470 dead transitions. [2024-06-21 16:51:07,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 470 transitions, 6328 flow [2024-06-21 16:51:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:51:07,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:51:07,946 INFO L175 Difference]: Start difference. First operand has 364 places, 450 transitions, 5084 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:51:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 470 transitions, 6328 flow [2024-06-21 16:51:11,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 470 transitions, 5990 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:11,823 INFO L231 Difference]: Finished difference. Result has 366 places, 450 transitions, 4848 flow [2024-06-21 16:51:11,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4848, PETRI_PLACES=366, PETRI_TRANSITIONS=450} [2024-06-21 16:51:11,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 16:51:11,824 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 450 transitions, 4848 flow [2024-06-21 16:51:11,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:11,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:11,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:11,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:51:11,825 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)] === [2024-06-21 16:51:11,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1189535045, now seen corresponding path program 12 times [2024-06-21 16:51:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:11,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025687162] [2024-06-21 16:51:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:12,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:12,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025687162] [2024-06-21 16:51:12,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025687162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:12,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:12,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432108435] [2024-06-21 16:51:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:12,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:12,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:12,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 450 transitions, 4848 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:12,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:12,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:13,979 INFO L124 PetriNetUnfolderBase]: 2862/4597 cut-off events. [2024-06-21 16:51:13,979 INFO L125 PetriNetUnfolderBase]: For 1212191/1212193 co-relation queries the response was YES. [2024-06-21 16:51:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53064 conditions, 4597 events. 2862/4597 cut-off events. For 1212191/1212193 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27167 event pairs, 662 based on Foata normal form. 2/4597 useless extension candidates. Maximal degree in co-relation 52895. Up to 4222 conditions per place. [2024-06-21 16:51:14,052 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 49 changer transitions 0/472 dead transitions. [2024-06-21 16:51:14,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 472 transitions, 5870 flow [2024-06-21 16:51:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:51:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:51:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 16:51:14,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 16:51:14,054 INFO L175 Difference]: Start difference. First operand has 366 places, 450 transitions, 4848 flow. Second operand 11 states and 189 transitions. [2024-06-21 16:51:14,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 472 transitions, 5870 flow [2024-06-21 16:51:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 472 transitions, 5629 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:17,179 INFO L231 Difference]: Finished difference. Result has 370 places, 450 transitions, 4711 flow [2024-06-21 16:51:17,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4711, PETRI_PLACES=370, PETRI_TRANSITIONS=450} [2024-06-21 16:51:17,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 16:51:17,180 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 450 transitions, 4711 flow [2024-06-21 16:51:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:17,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:17,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:51:17,180 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)] === [2024-06-21 16:51:17,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1178413082, now seen corresponding path program 1 times [2024-06-21 16:51:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:17,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752872270] [2024-06-21 16:51:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752872270] [2024-06-21 16:51:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752872270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:51:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817741156] [2024-06-21 16:51:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:51:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:51:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:51:18,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:51:18,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 450 transitions, 4711 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:18,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:18,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:51:18,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:19,345 INFO L124 PetriNetUnfolderBase]: 2671/4343 cut-off events. [2024-06-21 16:51:19,345 INFO L125 PetriNetUnfolderBase]: For 1224294/1224332 co-relation queries the response was YES. [2024-06-21 16:51:19,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51440 conditions, 4343 events. 2671/4343 cut-off events. For 1224294/1224332 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26047 event pairs, 615 based on Foata normal form. 10/4299 useless extension candidates. Maximal degree in co-relation 51270. Up to 3808 conditions per place. [2024-06-21 16:51:19,415 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 48 changer transitions 0/471 dead transitions. [2024-06-21 16:51:19,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 471 transitions, 5707 flow [2024-06-21 16:51:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:51:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:51:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 16:51:19,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:51:19,416 INFO L175 Difference]: Start difference. First operand has 370 places, 450 transitions, 4711 flow. Second operand 10 states and 176 transitions. [2024-06-21 16:51:19,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 471 transitions, 5707 flow [2024-06-21 16:51:22,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 471 transitions, 5564 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 16:51:22,738 INFO L231 Difference]: Finished difference. Result has 368 places, 453 transitions, 4780 flow [2024-06-21 16:51:22,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4780, PETRI_PLACES=368, PETRI_TRANSITIONS=453} [2024-06-21 16:51:22,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 16:51:22,738 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 453 transitions, 4780 flow [2024-06-21 16:51:22,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:22,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:22,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:22,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:51:22,739 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)] === [2024-06-21 16:51:22,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -63234893, now seen corresponding path program 7 times [2024-06-21 16:51:22,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758630326] [2024-06-21 16:51:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:23,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:23,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758630326] [2024-06-21 16:51:23,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758630326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:23,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:23,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897842308] [2024-06-21 16:51:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:23,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:23,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:23,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 453 transitions, 4780 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:23,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:23,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:23,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:24,679 INFO L124 PetriNetUnfolderBase]: 2885/4631 cut-off events. [2024-06-21 16:51:24,679 INFO L125 PetriNetUnfolderBase]: For 1249679/1249681 co-relation queries the response was YES. [2024-06-21 16:51:24,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53879 conditions, 4631 events. 2885/4631 cut-off events. For 1249679/1249681 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27317 event pairs, 675 based on Foata normal form. 2/4621 useless extension candidates. Maximal degree in co-relation 53708. Up to 4248 conditions per place. [2024-06-21 16:51:24,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 59 changer transitions 0/471 dead transitions. [2024-06-21 16:51:24,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 471 transitions, 5861 flow [2024-06-21 16:51:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:51:24,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 16:51:24,753 INFO L175 Difference]: Start difference. First operand has 368 places, 453 transitions, 4780 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:51:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 471 transitions, 5861 flow [2024-06-21 16:51:29,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 471 transitions, 5671 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 16:51:29,184 INFO L231 Difference]: Finished difference. Result has 369 places, 458 transitions, 4832 flow [2024-06-21 16:51:29,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4832, PETRI_PLACES=369, PETRI_TRANSITIONS=458} [2024-06-21 16:51:29,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 16:51:29,185 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 458 transitions, 4832 flow [2024-06-21 16:51:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:29,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:29,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:51:29,186 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)] === [2024-06-21 16:51:29,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash -73959653, now seen corresponding path program 8 times [2024-06-21 16:51:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132777764] [2024-06-21 16:51:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:29,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:30,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132777764] [2024-06-21 16:51:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132777764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:30,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:30,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:30,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580412030] [2024-06-21 16:51:30,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:30,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:30,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 458 transitions, 4832 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:30,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:30,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:31,181 INFO L124 PetriNetUnfolderBase]: 2893/4639 cut-off events. [2024-06-21 16:51:31,181 INFO L125 PetriNetUnfolderBase]: For 1268411/1268413 co-relation queries the response was YES. [2024-06-21 16:51:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54213 conditions, 4639 events. 2893/4639 cut-off events. For 1268411/1268413 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 27372 event pairs, 668 based on Foata normal form. 2/4629 useless extension candidates. Maximal degree in co-relation 54041. Up to 4260 conditions per place. [2024-06-21 16:51:31,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 60 changer transitions 0/473 dead transitions. [2024-06-21 16:51:31,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 473 transitions, 5896 flow [2024-06-21 16:51:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 16:51:31,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 16:51:31,263 INFO L175 Difference]: Start difference. First operand has 369 places, 458 transitions, 4832 flow. Second operand 9 states and 154 transitions. [2024-06-21 16:51:31,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 473 transitions, 5896 flow [2024-06-21 16:51:34,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 473 transitions, 5691 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:51:34,979 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 4850 flow [2024-06-21 16:51:34,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4850, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-21 16:51:34,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 16:51:34,980 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 4850 flow [2024-06-21 16:51:34,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:34,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:34,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:34,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:51:34,980 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)] === [2024-06-21 16:51:34,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash -563720171, now seen corresponding path program 9 times [2024-06-21 16:51:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:34,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192082616] [2024-06-21 16:51:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:35,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:35,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192082616] [2024-06-21 16:51:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192082616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:35,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392384571] [2024-06-21 16:51:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:36,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:36,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 4850 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:36,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:36,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:36,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:37,059 INFO L124 PetriNetUnfolderBase]: 2901/4655 cut-off events. [2024-06-21 16:51:37,059 INFO L125 PetriNetUnfolderBase]: For 1286669/1286671 co-relation queries the response was YES. [2024-06-21 16:51:37,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54525 conditions, 4655 events. 2901/4655 cut-off events. For 1286669/1286671 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27512 event pairs, 675 based on Foata normal form. 2/4645 useless extension candidates. Maximal degree in co-relation 54352. Up to 4272 conditions per place. [2024-06-21 16:51:37,138 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 62 changer transitions 0/475 dead transitions. [2024-06-21 16:51:37,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 475 transitions, 5922 flow [2024-06-21 16:51:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 16:51:37,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:51:37,156 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 4850 flow. Second operand 9 states and 153 transitions. [2024-06-21 16:51:37,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 475 transitions, 5922 flow [2024-06-21 16:51:41,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 475 transitions, 5527 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-21 16:51:41,453 INFO L231 Difference]: Finished difference. Result has 371 places, 462 transitions, 4686 flow [2024-06-21 16:51:41,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4686, PETRI_PLACES=371, PETRI_TRANSITIONS=462} [2024-06-21 16:51:41,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 16:51:41,454 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 462 transitions, 4686 flow [2024-06-21 16:51:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:41,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:41,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:51:41,454 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)] === [2024-06-21 16:51:41,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash -74286083, now seen corresponding path program 10 times [2024-06-21 16:51:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593912570] [2024-06-21 16:51:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:42,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593912570] [2024-06-21 16:51:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593912570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:42,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266794786] [2024-06-21 16:51:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:42,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:42,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:42,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:42,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 462 transitions, 4686 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:42,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:42,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:42,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:43,505 INFO L124 PetriNetUnfolderBase]: 2896/4646 cut-off events. [2024-06-21 16:51:43,505 INFO L125 PetriNetUnfolderBase]: For 1286480/1286482 co-relation queries the response was YES. [2024-06-21 16:51:43,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 4646 events. 2896/4646 cut-off events. For 1286480/1286482 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27433 event pairs, 669 based on Foata normal form. 2/4636 useless extension candidates. Maximal degree in co-relation 53722. Up to 4239 conditions per place. [2024-06-21 16:51:43,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 67 changer transitions 0/478 dead transitions. [2024-06-21 16:51:43,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 478 transitions, 5770 flow [2024-06-21 16:51:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:51:43,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 16:51:43,579 INFO L175 Difference]: Start difference. First operand has 371 places, 462 transitions, 4686 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:51:43,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 478 transitions, 5770 flow [2024-06-21 16:51:46,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 478 transitions, 5477 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-21 16:51:46,903 INFO L231 Difference]: Finished difference. Result has 371 places, 464 transitions, 4638 flow [2024-06-21 16:51:46,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4638, PETRI_PLACES=371, PETRI_TRANSITIONS=464} [2024-06-21 16:51:46,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 16:51:46,904 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 464 transitions, 4638 flow [2024-06-21 16:51:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:46,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:46,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:51:46,905 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)] === [2024-06-21 16:51:46,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1205901265, now seen corresponding path program 5 times [2024-06-21 16:51:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660868452] [2024-06-21 16:51:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:47,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660868452] [2024-06-21 16:51:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660868452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120404472] [2024-06-21 16:51:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:47,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:51:47,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 464 transitions, 4638 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:47,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:47,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:51:47,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:48,988 INFO L124 PetriNetUnfolderBase]: 2799/4553 cut-off events. [2024-06-21 16:51:48,988 INFO L125 PetriNetUnfolderBase]: For 1300064/1300066 co-relation queries the response was YES. [2024-06-21 16:51:49,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53535 conditions, 4553 events. 2799/4553 cut-off events. For 1300064/1300066 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27492 event pairs, 636 based on Foata normal form. 1/4526 useless extension candidates. Maximal degree in co-relation 53364. Up to 3852 conditions per place. [2024-06-21 16:51:49,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 65 changer transitions 0/491 dead transitions. [2024-06-21 16:51:49,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 491 transitions, 5764 flow [2024-06-21 16:51:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:51:49,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 16:51:49,061 INFO L175 Difference]: Start difference. First operand has 371 places, 464 transitions, 4638 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:51:49,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 491 transitions, 5764 flow [2024-06-21 16:51:52,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 491 transitions, 5535 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:52,412 INFO L231 Difference]: Finished difference. Result has 373 places, 467 transitions, 4735 flow [2024-06-21 16:51:52,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4409, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4735, PETRI_PLACES=373, PETRI_TRANSITIONS=467} [2024-06-21 16:51:52,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 16:51:52,413 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 467 transitions, 4735 flow [2024-06-21 16:51:52,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:52,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:52,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:52,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:51:52,413 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)] === [2024-06-21 16:51:52,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash 707023223, now seen corresponding path program 2 times [2024-06-21 16:51:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:52,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454541320] [2024-06-21 16:51:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:53,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:53,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454541320] [2024-06-21 16:51:53,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454541320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:53,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:53,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442553973] [2024-06-21 16:51:53,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:53,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:51:53,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 467 transitions, 4735 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:53,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:53,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:51:53,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:54,564 INFO L124 PetriNetUnfolderBase]: 2906/4665 cut-off events. [2024-06-21 16:51:54,564 INFO L125 PetriNetUnfolderBase]: For 1322112/1322124 co-relation queries the response was YES. [2024-06-21 16:51:54,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54692 conditions, 4665 events. 2906/4665 cut-off events. For 1322112/1322124 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27588 event pairs, 665 based on Foata normal form. 9/4668 useless extension candidates. Maximal degree in co-relation 54520. Up to 4296 conditions per place. [2024-06-21 16:51:54,635 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 36 changer transitions 0/493 dead transitions. [2024-06-21 16:51:54,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 493 transitions, 5937 flow [2024-06-21 16:51:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:51:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:51:54,636 INFO L175 Difference]: Start difference. First operand has 373 places, 467 transitions, 4735 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:51:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 493 transitions, 5937 flow [2024-06-21 16:51:58,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 493 transitions, 5631 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:58,086 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 4665 flow [2024-06-21 16:51:58,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4665, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-21 16:51:58,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 16:51:58,087 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 4665 flow [2024-06-21 16:51:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:58,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:58,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:51:58,087 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)] === [2024-06-21 16:51:58,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:58,087 INFO L85 PathProgramCache]: Analyzing trace with hash 707022851, now seen corresponding path program 6 times [2024-06-21 16:51:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:58,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337398535] [2024-06-21 16:51:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:58,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:58,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:58,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337398535] [2024-06-21 16:51:58,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337398535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:58,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:58,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137085511] [2024-06-21 16:51:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:59,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:51:59,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 4665 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:59,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:59,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:51:59,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:00,244 INFO L124 PetriNetUnfolderBase]: 2809/4569 cut-off events. [2024-06-21 16:52:00,245 INFO L125 PetriNetUnfolderBase]: For 1348790/1348792 co-relation queries the response was YES. [2024-06-21 16:52:00,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54485 conditions, 4569 events. 2809/4569 cut-off events. For 1348790/1348792 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27587 event pairs, 636 based on Foata normal form. 1/4542 useless extension candidates. Maximal degree in co-relation 54312. Up to 3858 conditions per place. [2024-06-21 16:52:00,315 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 70 changer transitions 0/494 dead transitions. [2024-06-21 16:52:00,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 494 transitions, 5793 flow [2024-06-21 16:52:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:52:00,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 16:52:00,316 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 4665 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:52:00,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 494 transitions, 5793 flow [2024-06-21 16:52:03,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 494 transitions, 5579 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 16:52:03,886 INFO L231 Difference]: Finished difference. Result has 377 places, 473 transitions, 4795 flow [2024-06-21 16:52:03,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4795, PETRI_PLACES=377, PETRI_TRANSITIONS=473} [2024-06-21 16:52:03,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 16:52:03,887 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 473 transitions, 4795 flow [2024-06-21 16:52:03,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:03,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:03,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:03,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:52:03,888 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)] === [2024-06-21 16:52:03,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1061701973, now seen corresponding path program 3 times [2024-06-21 16:52:03,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:03,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370820650] [2024-06-21 16:52:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370820650] [2024-06-21 16:52:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370820650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:04,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:04,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112049183] [2024-06-21 16:52:04,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:04,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:04,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:04,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:52:04,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 473 transitions, 4795 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:04,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:04,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:52:04,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:05,961 INFO L124 PetriNetUnfolderBase]: 2916/4683 cut-off events. [2024-06-21 16:52:05,961 INFO L125 PetriNetUnfolderBase]: For 1372520/1372532 co-relation queries the response was YES. [2024-06-21 16:52:06,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55759 conditions, 4683 events. 2916/4683 cut-off events. For 1372520/1372532 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 27781 event pairs, 665 based on Foata normal form. 9/4686 useless extension candidates. Maximal degree in co-relation 55585. Up to 4283 conditions per place. [2024-06-21 16:52:06,032 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 58 changer transitions 0/500 dead transitions. [2024-06-21 16:52:06,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 500 transitions, 6431 flow [2024-06-21 16:52:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:52:06,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:52:06,033 INFO L175 Difference]: Start difference. First operand has 377 places, 473 transitions, 4795 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:52:06,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 500 transitions, 6431 flow [2024-06-21 16:52:09,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 500 transitions, 6109 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-21 16:52:09,989 INFO L231 Difference]: Finished difference. Result has 379 places, 479 transitions, 4921 flow [2024-06-21 16:52:09,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4921, PETRI_PLACES=379, PETRI_TRANSITIONS=479} [2024-06-21 16:52:09,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 16:52:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 479 transitions, 4921 flow [2024-06-21 16:52:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:09,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:09,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:09,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:52:09,991 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)] === [2024-06-21 16:52:09,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1061285891, now seen corresponding path program 7 times [2024-06-21 16:52:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934233717] [2024-06-21 16:52:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:10,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934233717] [2024-06-21 16:52:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934233717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:10,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:10,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:10,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408873844] [2024-06-21 16:52:10,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:10,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:10,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:10,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:52:10,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 479 transitions, 4921 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:10,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:10,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:52:10,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:12,000 INFO L124 PetriNetUnfolderBase]: 2819/4583 cut-off events. [2024-06-21 16:52:12,000 INFO L125 PetriNetUnfolderBase]: For 1401566/1401568 co-relation queries the response was YES. [2024-06-21 16:52:12,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55574 conditions, 4583 events. 2819/4583 cut-off events. For 1401566/1401568 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27672 event pairs, 636 based on Foata normal form. 1/4556 useless extension candidates. Maximal degree in co-relation 55399. Up to 3835 conditions per place. [2024-06-21 16:52:12,072 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 96 changer transitions 0/504 dead transitions. [2024-06-21 16:52:12,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 504 transitions, 6527 flow [2024-06-21 16:52:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:52:12,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 16:52:12,074 INFO L175 Difference]: Start difference. First operand has 379 places, 479 transitions, 4921 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:52:12,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 504 transitions, 6527 flow [2024-06-21 16:52:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 504 transitions, 6275 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-21 16:52:16,522 INFO L231 Difference]: Finished difference. Result has 383 places, 485 transitions, 5273 flow [2024-06-21 16:52:16,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5273, PETRI_PLACES=383, PETRI_TRANSITIONS=485} [2024-06-21 16:52:16,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 16:52:16,523 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 485 transitions, 5273 flow [2024-06-21 16:52:16,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:16,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:16,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:52:16,523 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)] === [2024-06-21 16:52:16,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash -851339323, now seen corresponding path program 4 times [2024-06-21 16:52:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:16,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999081828] [2024-06-21 16:52:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999081828] [2024-06-21 16:52:17,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999081828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:17,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:17,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:17,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944981146] [2024-06-21 16:52:17,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:17,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:17,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:17,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:52:17,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 485 transitions, 5273 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:17,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:17,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:52:17,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:18,650 INFO L124 PetriNetUnfolderBase]: 2926/4697 cut-off events. [2024-06-21 16:52:18,650 INFO L125 PetriNetUnfolderBase]: For 1423779/1423791 co-relation queries the response was YES. [2024-06-21 16:52:18,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56865 conditions, 4697 events. 2926/4697 cut-off events. For 1423779/1423791 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27894 event pairs, 665 based on Foata normal form. 9/4700 useless extension candidates. Maximal degree in co-relation 56688. Up to 4296 conditions per place. [2024-06-21 16:52:18,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 58 changer transitions 0/509 dead transitions. [2024-06-21 16:52:18,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 509 transitions, 6733 flow [2024-06-21 16:52:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:52:18,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:52:18,725 INFO L175 Difference]: Start difference. First operand has 383 places, 485 transitions, 5273 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:52:18,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 509 transitions, 6733 flow [2024-06-21 16:52:22,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 509 transitions, 6422 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-21 16:52:22,868 INFO L231 Difference]: Finished difference. Result has 387 places, 488 transitions, 5206 flow [2024-06-21 16:52:22,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5206, PETRI_PLACES=387, PETRI_TRANSITIONS=488} [2024-06-21 16:52:22,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 16:52:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 488 transitions, 5206 flow [2024-06-21 16:52:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:22,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:22,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:52:22,870 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)] === [2024-06-21 16:52:22,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2062955733, now seen corresponding path program 8 times [2024-06-21 16:52:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104375060] [2024-06-21 16:52:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:23,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:23,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104375060] [2024-06-21 16:52:23,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104375060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:23,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:23,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936593699] [2024-06-21 16:52:23,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:23,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:23,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:52:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 488 transitions, 5206 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:52:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:24,965 INFO L124 PetriNetUnfolderBase]: 2840/4618 cut-off events. [2024-06-21 16:52:24,966 INFO L125 PetriNetUnfolderBase]: For 1435067/1435069 co-relation queries the response was YES. [2024-06-21 16:52:25,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56204 conditions, 4618 events. 2840/4618 cut-off events. For 1435067/1435069 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 27944 event pairs, 636 based on Foata normal form. 1/4591 useless extension candidates. Maximal degree in co-relation 56025. Up to 3900 conditions per place. [2024-06-21 16:52:25,040 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 65 changer transitions 0/518 dead transitions. [2024-06-21 16:52:25,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 518 transitions, 6398 flow [2024-06-21 16:52:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 16:52:25,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 16:52:25,041 INFO L175 Difference]: Start difference. First operand has 387 places, 488 transitions, 5206 flow. Second operand 9 states and 175 transitions. [2024-06-21 16:52:25,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 518 transitions, 6398 flow [2024-06-21 16:52:29,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 518 transitions, 6200 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 16:52:29,232 INFO L231 Difference]: Finished difference. Result has 390 places, 494 transitions, 5354 flow [2024-06-21 16:52:29,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5354, PETRI_PLACES=390, PETRI_TRANSITIONS=494} [2024-06-21 16:52:29,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 16:52:29,233 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 494 transitions, 5354 flow [2024-06-21 16:52:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:29,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:29,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:29,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:52:29,234 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)] === [2024-06-21 16:52:29,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1325165719, now seen corresponding path program 9 times [2024-06-21 16:52:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746575126] [2024-06-21 16:52:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:29,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746575126] [2024-06-21 16:52:30,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746575126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:30,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:30,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298704433] [2024-06-21 16:52:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:30,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:30,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:30,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:52:30,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 494 transitions, 5354 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:30,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:30,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:52:30,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:31,388 INFO L124 PetriNetUnfolderBase]: 2845/4627 cut-off events. [2024-06-21 16:52:31,388 INFO L125 PetriNetUnfolderBase]: For 1455872/1455874 co-relation queries the response was YES. [2024-06-21 16:52:31,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56523 conditions, 4627 events. 2845/4627 cut-off events. For 1455872/1455874 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 27984 event pairs, 637 based on Foata normal form. 3/4604 useless extension candidates. Maximal degree in co-relation 56343. Up to 3907 conditions per place. [2024-06-21 16:52:31,463 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 395 selfloop transitions, 69 changer transitions 0/524 dead transitions. [2024-06-21 16:52:31,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 524 transitions, 6576 flow [2024-06-21 16:52:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:52:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:52:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:52:31,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 16:52:31,465 INFO L175 Difference]: Start difference. First operand has 390 places, 494 transitions, 5354 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:52:31,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 524 transitions, 6576 flow [2024-06-21 16:52:36,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 524 transitions, 6290 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-21 16:52:36,682 INFO L231 Difference]: Finished difference. Result has 395 places, 499 transitions, 5427 flow [2024-06-21 16:52:36,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5427, PETRI_PLACES=395, PETRI_TRANSITIONS=499} [2024-06-21 16:52:36,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 16:52:36,696 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 499 transitions, 5427 flow [2024-06-21 16:52:36,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:36,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:36,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:36,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:52:36,697 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)] === [2024-06-21 16:52:36,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:36,699 INFO L85 PathProgramCache]: Analyzing trace with hash 319396579, now seen corresponding path program 5 times [2024-06-21 16:52:36,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:36,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835679105] [2024-06-21 16:52:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:36,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:37,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835679105] [2024-06-21 16:52:37,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835679105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:37,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729193608] [2024-06-21 16:52:37,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:37,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:52:37,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 499 transitions, 5427 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:37,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:37,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:52:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:38,688 INFO L124 PetriNetUnfolderBase]: 2944/4730 cut-off events. [2024-06-21 16:52:38,688 INFO L125 PetriNetUnfolderBase]: For 1460368/1460380 co-relation queries the response was YES. [2024-06-21 16:52:38,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56941 conditions, 4730 events. 2944/4730 cut-off events. For 1460368/1460380 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 28112 event pairs, 665 based on Foata normal form. 9/4733 useless extension candidates. Maximal degree in co-relation 56759. Up to 4350 conditions per place. [2024-06-21 16:52:38,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 35 changer transitions 0/521 dead transitions. [2024-06-21 16:52:38,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 521 transitions, 6532 flow [2024-06-21 16:52:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:52:38,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:52:38,768 INFO L175 Difference]: Start difference. First operand has 395 places, 499 transitions, 5427 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:52:38,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 521 transitions, 6532 flow [2024-06-21 16:52:43,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 521 transitions, 6141 flow, removed 130 selfloop flow, removed 7 redundant places. [2024-06-21 16:52:43,467 INFO L231 Difference]: Finished difference. Result has 397 places, 499 transitions, 5112 flow [2024-06-21 16:52:43,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5112, PETRI_PLACES=397, PETRI_TRANSITIONS=499} [2024-06-21 16:52:43,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 16:52:43,468 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 499 transitions, 5112 flow [2024-06-21 16:52:43,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:43,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:43,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:43,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:52:43,468 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)] === [2024-06-21 16:52:43,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash 313855453, now seen corresponding path program 13 times [2024-06-21 16:52:43,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:43,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890150099] [2024-06-21 16:52:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890150099] [2024-06-21 16:52:44,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890150099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:44,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:44,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:44,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259522002] [2024-06-21 16:52:44,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:44,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:44,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:44,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:44,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:52:44,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 499 transitions, 5112 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:44,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:44,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:52:44,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:45,401 INFO L124 PetriNetUnfolderBase]: 2954/4741 cut-off events. [2024-06-21 16:52:45,402 INFO L125 PetriNetUnfolderBase]: For 1487432/1487436 co-relation queries the response was YES. [2024-06-21 16:52:45,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56946 conditions, 4741 events. 2954/4741 cut-off events. For 1487432/1487436 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 28160 event pairs, 674 based on Foata normal form. 3/4732 useless extension candidates. Maximal degree in co-relation 56762. Up to 4320 conditions per place. [2024-06-21 16:52:45,483 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 43 changer transitions 0/524 dead transitions. [2024-06-21 16:52:45,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 524 transitions, 6379 flow [2024-06-21 16:52:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:52:45,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:52:45,484 INFO L175 Difference]: Start difference. First operand has 397 places, 499 transitions, 5112 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:52:45,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 524 transitions, 6379 flow [2024-06-21 16:52:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 524 transitions, 6253 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 16:52:50,462 INFO L231 Difference]: Finished difference. Result has 397 places, 502 transitions, 5231 flow [2024-06-21 16:52:50,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5231, PETRI_PLACES=397, PETRI_TRANSITIONS=502} [2024-06-21 16:52:50,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 16:52:50,467 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 502 transitions, 5231 flow [2024-06-21 16:52:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:50,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:50,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:52:50,468 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)] === [2024-06-21 16:52:50,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash 319396207, now seen corresponding path program 10 times [2024-06-21 16:52:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:50,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949656312] [2024-06-21 16:52:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:50,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:51,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:51,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949656312] [2024-06-21 16:52:51,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949656312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:51,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:51,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838339720] [2024-06-21 16:52:51,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:51,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:52:51,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 502 transitions, 5231 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:51,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:51,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:52:51,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:52,438 INFO L124 PetriNetUnfolderBase]: 2849/4633 cut-off events. [2024-06-21 16:52:52,439 INFO L125 PetriNetUnfolderBase]: For 1491984/1491988 co-relation queries the response was YES. [2024-06-21 16:52:52,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56297 conditions, 4633 events. 2849/4633 cut-off events. For 1491984/1491988 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 28015 event pairs, 638 based on Foata normal form. 2/4607 useless extension candidates. Maximal degree in co-relation 56112. Up to 3901 conditions per place. [2024-06-21 16:52:52,515 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 74 changer transitions 0/522 dead transitions. [2024-06-21 16:52:52,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 522 transitions, 6211 flow [2024-06-21 16:52:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:52:52,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 16:52:52,516 INFO L175 Difference]: Start difference. First operand has 397 places, 502 transitions, 5231 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:52:52,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 522 transitions, 6211 flow [2024-06-21 16:52:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 522 transitions, 5885 flow, removed 122 selfloop flow, removed 7 redundant places. [2024-06-21 16:52:57,558 INFO L231 Difference]: Finished difference. Result has 399 places, 502 transitions, 5059 flow [2024-06-21 16:52:57,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5059, PETRI_PLACES=399, PETRI_TRANSITIONS=502} [2024-06-21 16:52:57,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 16:52:57,559 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 502 transitions, 5059 flow [2024-06-21 16:52:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:57,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:57,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:52:57,560 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)] === [2024-06-21 16:52:57,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1643988719, now seen corresponding path program 14 times [2024-06-21 16:52:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:57,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906935521] [2024-06-21 16:52:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906935521] [2024-06-21 16:52:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906935521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276475462] [2024-06-21 16:52:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:58,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:58,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:52:58,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 502 transitions, 5059 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:58,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:58,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:52:58,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:59,486 INFO L124 PetriNetUnfolderBase]: 2961/4759 cut-off events. [2024-06-21 16:52:59,487 INFO L125 PetriNetUnfolderBase]: For 1515974/1515978 co-relation queries the response was YES. [2024-06-21 16:52:59,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57091 conditions, 4759 events. 2961/4759 cut-off events. For 1515974/1515978 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28370 event pairs, 669 based on Foata normal form. 3/4750 useless extension candidates. Maximal degree in co-relation 56905. Up to 4289 conditions per place. [2024-06-21 16:52:59,565 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 55 changer transitions 0/526 dead transitions. [2024-06-21 16:52:59,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 526 transitions, 6616 flow [2024-06-21 16:52:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:52:59,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:52:59,567 INFO L175 Difference]: Start difference. First operand has 399 places, 502 transitions, 5059 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:52:59,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 526 transitions, 6616 flow [2024-06-21 16:53:05,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 526 transitions, 6305 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 16:53:05,088 INFO L231 Difference]: Finished difference. Result has 399 places, 505 transitions, 5017 flow [2024-06-21 16:53:05,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5017, PETRI_PLACES=399, PETRI_TRANSITIONS=505} [2024-06-21 16:53:05,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 16:53:05,089 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 505 transitions, 5017 flow [2024-06-21 16:53:05,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:05,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:05,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:05,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:53:05,089 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)] === [2024-06-21 16:53:05,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2059220264, now seen corresponding path program 5 times [2024-06-21 16:53:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326355194] [2024-06-21 16:53:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326355194] [2024-06-21 16:53:05,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326355194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:05,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:05,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:05,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739319500] [2024-06-21 16:53:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:05,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:05,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:05,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 505 transitions, 5017 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:05,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:05,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:05,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:07,100 INFO L124 PetriNetUnfolderBase]: 2955/4750 cut-off events. [2024-06-21 16:53:07,100 INFO L125 PetriNetUnfolderBase]: For 1515724/1515736 co-relation queries the response was YES. [2024-06-21 16:53:07,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56561 conditions, 4750 events. 2955/4750 cut-off events. For 1515724/1515736 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28317 event pairs, 660 based on Foata normal form. 10/4754 useless extension candidates. Maximal degree in co-relation 56375. Up to 4386 conditions per place. [2024-06-21 16:53:07,182 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 28 changer transitions 0/528 dead transitions. [2024-06-21 16:53:07,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 528 transitions, 6187 flow [2024-06-21 16:53:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:53:07,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 16:53:07,183 INFO L175 Difference]: Start difference. First operand has 399 places, 505 transitions, 5017 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:53:07,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 528 transitions, 6187 flow [2024-06-21 16:53:13,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 528 transitions, 5706 flow, removed 122 selfloop flow, removed 9 redundant places. [2024-06-21 16:53:13,341 INFO L231 Difference]: Finished difference. Result has 399 places, 506 transitions, 4625 flow [2024-06-21 16:53:13,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4625, PETRI_PLACES=399, PETRI_TRANSITIONS=506} [2024-06-21 16:53:13,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 16:53:13,341 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 506 transitions, 4625 flow [2024-06-21 16:53:13,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:13,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:13,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:13,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:53:13,342 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)] === [2024-06-21 16:53:13,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2059220667, now seen corresponding path program 15 times [2024-06-21 16:53:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:13,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217183832] [2024-06-21 16:53:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217183832] [2024-06-21 16:53:14,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217183832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:14,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:14,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504527762] [2024-06-21 16:53:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:14,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 506 transitions, 4625 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:14,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:14,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:14,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:15,299 INFO L124 PetriNetUnfolderBase]: 2949/4741 cut-off events. [2024-06-21 16:53:15,300 INFO L125 PetriNetUnfolderBase]: For 1509854/1509858 co-relation queries the response was YES. [2024-06-21 16:53:15,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55558 conditions, 4741 events. 2949/4741 cut-off events. For 1509854/1509858 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28236 event pairs, 666 based on Foata normal form. 3/4732 useless extension candidates. Maximal degree in co-relation 55373. Up to 4276 conditions per place. [2024-06-21 16:53:15,379 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 465 selfloop transitions, 56 changer transitions 0/526 dead transitions. [2024-06-21 16:53:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 526 transitions, 5751 flow [2024-06-21 16:53:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:53:15,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:53:15,381 INFO L175 Difference]: Start difference. First operand has 399 places, 506 transitions, 4625 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:53:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 526 transitions, 5751 flow [2024-06-21 16:53:19,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 526 transitions, 5577 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 16:53:19,730 INFO L231 Difference]: Finished difference. Result has 401 places, 506 transitions, 4569 flow [2024-06-21 16:53:19,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4569, PETRI_PLACES=401, PETRI_TRANSITIONS=506} [2024-06-21 16:53:19,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 16:53:19,730 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 506 transitions, 4569 flow [2024-06-21 16:53:19,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:19,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:19,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:19,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:53:19,731 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)] === [2024-06-21 16:53:19,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 346331864, now seen corresponding path program 6 times [2024-06-21 16:53:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:19,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931339418] [2024-06-21 16:53:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931339418] [2024-06-21 16:53:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931339418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:20,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:20,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316958528] [2024-06-21 16:53:20,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:20,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:20,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:20,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:20,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 506 transitions, 4569 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:20,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:20,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:20,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:21,774 INFO L124 PetriNetUnfolderBase]: 2975/4786 cut-off events. [2024-06-21 16:53:21,775 INFO L125 PetriNetUnfolderBase]: For 1551736/1551748 co-relation queries the response was YES. [2024-06-21 16:53:21,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56422 conditions, 4786 events. 2975/4786 cut-off events. For 1551736/1551748 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28663 event pairs, 643 based on Foata normal form. 10/4790 useless extension candidates. Maximal degree in co-relation 56236. Up to 4323 conditions per place. [2024-06-21 16:53:21,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 58 changer transitions 0/535 dead transitions. [2024-06-21 16:53:21,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 535 transitions, 6280 flow [2024-06-21 16:53:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:53:21,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:53:21,855 INFO L175 Difference]: Start difference. First operand has 401 places, 506 transitions, 4569 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:53:21,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 535 transitions, 6280 flow [2024-06-21 16:53:26,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 535 transitions, 6100 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:53:26,585 INFO L231 Difference]: Finished difference. Result has 402 places, 514 transitions, 4803 flow [2024-06-21 16:53:26,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4803, PETRI_PLACES=402, PETRI_TRANSITIONS=514} [2024-06-21 16:53:26,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 16:53:26,586 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 514 transitions, 4803 flow [2024-06-21 16:53:26,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:26,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:26,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:26,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:53:26,586 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)] === [2024-06-21 16:53:26,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 345886394, now seen corresponding path program 7 times [2024-06-21 16:53:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:26,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104016038] [2024-06-21 16:53:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:26,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:27,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:27,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104016038] [2024-06-21 16:53:27,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104016038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:27,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:27,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:27,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452060439] [2024-06-21 16:53:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:27,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:27,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 514 transitions, 4803 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:27,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:27,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:27,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:28,546 INFO L124 PetriNetUnfolderBase]: 2985/4802 cut-off events. [2024-06-21 16:53:28,547 INFO L125 PetriNetUnfolderBase]: For 1580381/1580393 co-relation queries the response was YES. [2024-06-21 16:53:28,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57135 conditions, 4802 events. 2985/4802 cut-off events. For 1580381/1580393 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28772 event pairs, 650 based on Foata normal form. 10/4806 useless extension candidates. Maximal degree in co-relation 56947. Up to 4333 conditions per place. [2024-06-21 16:53:28,627 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 58 changer transitions 0/538 dead transitions. [2024-06-21 16:53:28,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 538 transitions, 6393 flow [2024-06-21 16:53:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:53:28,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:53:28,628 INFO L175 Difference]: Start difference. First operand has 402 places, 514 transitions, 4803 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:53:28,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 538 transitions, 6393 flow [2024-06-21 16:53:33,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 538 transitions, 6147 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:33,559 INFO L231 Difference]: Finished difference. Result has 406 places, 517 transitions, 4816 flow [2024-06-21 16:53:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4816, PETRI_PLACES=406, PETRI_TRANSITIONS=517} [2024-06-21 16:53:33,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 16:53:33,560 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 517 transitions, 4816 flow [2024-06-21 16:53:33,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:33,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:33,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:33,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:53:33,561 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)] === [2024-06-21 16:53:33,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash 332999384, now seen corresponding path program 8 times [2024-06-21 16:53:33,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:33,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621234059] [2024-06-21 16:53:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:33,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:34,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621234059] [2024-06-21 16:53:34,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621234059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:34,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:34,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801062887] [2024-06-21 16:53:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:34,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:34,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 517 transitions, 4816 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:34,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:34,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:34,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:35,517 INFO L124 PetriNetUnfolderBase]: 2979/4788 cut-off events. [2024-06-21 16:53:35,517 INFO L125 PetriNetUnfolderBase]: For 1575684/1575696 co-relation queries the response was YES. [2024-06-21 16:53:35,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56779 conditions, 4788 events. 2979/4788 cut-off events. For 1575684/1575696 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28617 event pairs, 651 based on Foata normal form. 10/4792 useless extension candidates. Maximal degree in co-relation 56589. Up to 4328 conditions per place. [2024-06-21 16:53:35,598 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 57 changer transitions 0/538 dead transitions. [2024-06-21 16:53:35,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 5996 flow [2024-06-21 16:53:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:53:35,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:53:35,599 INFO L175 Difference]: Start difference. First operand has 406 places, 517 transitions, 4816 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:53:35,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 5996 flow [2024-06-21 16:53:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 538 transitions, 5745 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:40,146 INFO L231 Difference]: Finished difference. Result has 409 places, 518 transitions, 4698 flow [2024-06-21 16:53:40,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4698, PETRI_PLACES=409, PETRI_TRANSITIONS=518} [2024-06-21 16:53:40,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 16:53:40,147 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 518 transitions, 4698 flow [2024-06-21 16:53:40,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:40,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:40,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:53:40,147 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)] === [2024-06-21 16:53:40,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1566739595, now seen corresponding path program 16 times [2024-06-21 16:53:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:40,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763711540] [2024-06-21 16:53:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:40,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763711540] [2024-06-21 16:53:40,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763711540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:40,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:40,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:40,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201823711] [2024-06-21 16:53:40,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:40,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:40,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 518 transitions, 4698 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:40,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:40,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:40,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:42,067 INFO L124 PetriNetUnfolderBase]: 3005/4851 cut-off events. [2024-06-21 16:53:42,067 INFO L125 PetriNetUnfolderBase]: For 1622499/1622503 co-relation queries the response was YES. [2024-06-21 16:53:42,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57837 conditions, 4851 events. 3005/4851 cut-off events. For 1622499/1622503 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29218 event pairs, 657 based on Foata normal form. 3/4842 useless extension candidates. Maximal degree in co-relation 57646. Up to 4217 conditions per place. [2024-06-21 16:53:42,147 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 101 changer transitions 0/543 dead transitions. [2024-06-21 16:53:42,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 543 transitions, 6522 flow [2024-06-21 16:53:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:53:42,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:53:42,148 INFO L175 Difference]: Start difference. First operand has 409 places, 518 transitions, 4698 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:53:42,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 543 transitions, 6522 flow [2024-06-21 16:53:46,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 543 transitions, 6421 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:46,976 INFO L231 Difference]: Finished difference. Result has 412 places, 524 transitions, 5183 flow [2024-06-21 16:53:46,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5183, PETRI_PLACES=412, PETRI_TRANSITIONS=524} [2024-06-21 16:53:46,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 16:53:46,976 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 524 transitions, 5183 flow [2024-06-21 16:53:46,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:46,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:46,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:46,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:53:46,977 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)] === [2024-06-21 16:53:46,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1171237911, now seen corresponding path program 17 times [2024-06-21 16:53:46,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:46,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253189565] [2024-06-21 16:53:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:46,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:47,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:47,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253189565] [2024-06-21 16:53:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253189565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:47,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:47,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:47,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731654559] [2024-06-21 16:53:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:47,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:47,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:47,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:47,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 524 transitions, 5183 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:47,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:47,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:47,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:49,129 INFO L124 PetriNetUnfolderBase]: 3015/4849 cut-off events. [2024-06-21 16:53:49,129 INFO L125 PetriNetUnfolderBase]: For 1656881/1656885 co-relation queries the response was YES. [2024-06-21 16:53:49,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58825 conditions, 4849 events. 3015/4849 cut-off events. For 1656881/1656885 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29046 event pairs, 668 based on Foata normal form. 3/4840 useless extension candidates. Maximal degree in co-relation 58633. Up to 4227 conditions per place. [2024-06-21 16:53:49,211 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 444 selfloop transitions, 97 changer transitions 0/546 dead transitions. [2024-06-21 16:53:49,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 546 transitions, 6835 flow [2024-06-21 16:53:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:53:49,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:53:49,212 INFO L175 Difference]: Start difference. First operand has 412 places, 524 transitions, 5183 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:53:49,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 546 transitions, 6835 flow [2024-06-21 16:53:55,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 546 transitions, 6511 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:55,701 INFO L231 Difference]: Finished difference. Result has 416 places, 527 transitions, 5251 flow [2024-06-21 16:53:55,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5251, PETRI_PLACES=416, PETRI_TRANSITIONS=527} [2024-06-21 16:53:55,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 16:53:55,702 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 527 transitions, 5251 flow [2024-06-21 16:53:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:55,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:55,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:55,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:53:55,703 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)] === [2024-06-21 16:53:55,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1579637765, now seen corresponding path program 18 times [2024-06-21 16:53:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:55,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397412221] [2024-06-21 16:53:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:55,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397412221] [2024-06-21 16:53:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397412221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:56,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:56,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765698572] [2024-06-21 16:53:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:56,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:53:56,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 527 transitions, 5251 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:56,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:56,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:53:56,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:57,800 INFO L124 PetriNetUnfolderBase]: 3009/4843 cut-off events. [2024-06-21 16:53:57,800 INFO L125 PetriNetUnfolderBase]: For 1649432/1649436 co-relation queries the response was YES. [2024-06-21 16:53:57,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58423 conditions, 4843 events. 3009/4843 cut-off events. For 1649432/1649436 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29033 event pairs, 668 based on Foata normal form. 3/4834 useless extension candidates. Maximal degree in co-relation 58229. Up to 4222 conditions per place. [2024-06-21 16:53:57,885 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 442 selfloop transitions, 98 changer transitions 0/545 dead transitions. [2024-06-21 16:53:57,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 545 transitions, 6417 flow [2024-06-21 16:53:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:53:57,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:53:57,886 INFO L175 Difference]: Start difference. First operand has 416 places, 527 transitions, 5251 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:53:57,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 545 transitions, 6417 flow [2024-06-21 16:54:03,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 545 transitions, 5898 flow, removed 145 selfloop flow, removed 7 redundant places. [2024-06-21 16:54:03,518 INFO L231 Difference]: Finished difference. Result has 418 places, 527 transitions, 4934 flow [2024-06-21 16:54:03,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4934, PETRI_PLACES=418, PETRI_TRANSITIONS=527} [2024-06-21 16:54:03,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 16:54:03,518 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 527 transitions, 4934 flow [2024-06-21 16:54:03,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:03,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:03,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:03,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:54:03,519 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)] === [2024-06-21 16:54:03,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash -62844634, now seen corresponding path program 9 times [2024-06-21 16:54:03,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:03,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465991980] [2024-06-21 16:54:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:03,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:04,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:04,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465991980] [2024-06-21 16:54:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465991980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:04,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131365022] [2024-06-21 16:54:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:04,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:04,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 527 transitions, 4934 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:04,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:04,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:04,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:05,561 INFO L124 PetriNetUnfolderBase]: 3043/4893 cut-off events. [2024-06-21 16:54:05,561 INFO L125 PetriNetUnfolderBase]: For 1703230/1703245 co-relation queries the response was YES. [2024-06-21 16:54:05,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59300 conditions, 4893 events. 3043/4893 cut-off events. For 1703230/1703245 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29434 event pairs, 637 based on Foata normal form. 12/4897 useless extension candidates. Maximal degree in co-relation 59105. Up to 4177 conditions per place. [2024-06-21 16:54:05,807 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 130 changer transitions 0/569 dead transitions. [2024-06-21 16:54:05,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 569 transitions, 7246 flow [2024-06-21 16:54:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:54:05,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:54:05,809 INFO L175 Difference]: Start difference. First operand has 418 places, 527 transitions, 4934 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:54:05,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 569 transitions, 7246 flow [2024-06-21 16:54:10,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 569 transitions, 7040 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:54:10,875 INFO L231 Difference]: Finished difference. Result has 422 places, 547 transitions, 5620 flow [2024-06-21 16:54:10,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4728, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5620, PETRI_PLACES=422, PETRI_TRANSITIONS=547} [2024-06-21 16:54:10,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 16:54:10,876 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 547 transitions, 5620 flow [2024-06-21 16:54:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:10,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:10,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:54:10,877 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)] === [2024-06-21 16:54:10,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash 511093319, now seen corresponding path program 19 times [2024-06-21 16:54:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395321082] [2024-06-21 16:54:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:11,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:11,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395321082] [2024-06-21 16:54:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395321082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:11,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:11,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665354887] [2024-06-21 16:54:11,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:11,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:11,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:11,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 547 transitions, 5620 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:11,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:11,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:11,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:13,175 INFO L124 PetriNetUnfolderBase]: 3093/4978 cut-off events. [2024-06-21 16:54:13,175 INFO L125 PetriNetUnfolderBase]: For 1804091/1804098 co-relation queries the response was YES. [2024-06-21 16:54:13,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62560 conditions, 4978 events. 3093/4978 cut-off events. For 1804091/1804098 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30095 event pairs, 673 based on Foata normal form. 5/4968 useless extension candidates. Maximal degree in co-relation 62361. Up to 4019 conditions per place. [2024-06-21 16:54:13,257 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 198 changer transitions 0/578 dead transitions. [2024-06-21 16:54:13,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 578 transitions, 8524 flow [2024-06-21 16:54:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:54:13,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:54:13,258 INFO L175 Difference]: Start difference. First operand has 422 places, 547 transitions, 5620 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:54:13,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 578 transitions, 8524 flow [2024-06-21 16:54:18,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 578 transitions, 8260 flow, removed 115 selfloop flow, removed 3 redundant places. [2024-06-21 16:54:18,992 INFO L231 Difference]: Finished difference. Result has 428 places, 559 transitions, 6540 flow [2024-06-21 16:54:18,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5372, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6540, PETRI_PLACES=428, PETRI_TRANSITIONS=559} [2024-06-21 16:54:18,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 16:54:18,993 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 559 transitions, 6540 flow [2024-06-21 16:54:18,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:18,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:18,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:54:18,993 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)] === [2024-06-21 16:54:18,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash 973394249, now seen corresponding path program 20 times [2024-06-21 16:54:18,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:18,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595011619] [2024-06-21 16:54:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:19,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:19,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595011619] [2024-06-21 16:54:19,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595011619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:19,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:19,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3780454] [2024-06-21 16:54:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:19,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:19,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:19,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:19,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 559 transitions, 6540 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:19,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:19,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:19,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:21,289 INFO L124 PetriNetUnfolderBase]: 3135/5019 cut-off events. [2024-06-21 16:54:21,290 INFO L125 PetriNetUnfolderBase]: For 1873902/1873906 co-relation queries the response was YES. [2024-06-21 16:54:21,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64608 conditions, 5019 events. 3135/5019 cut-off events. For 1873902/1873906 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30046 event pairs, 697 based on Foata normal form. 3/5010 useless extension candidates. Maximal degree in co-relation 64407. Up to 4564 conditions per place. [2024-06-21 16:54:21,376 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 74 changer transitions 0/586 dead transitions. [2024-06-21 16:54:21,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 586 transitions, 8958 flow [2024-06-21 16:54:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:54:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:54:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 16:54:21,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 16:54:21,377 INFO L175 Difference]: Start difference. First operand has 428 places, 559 transitions, 6540 flow. Second operand 11 states and 188 transitions. [2024-06-21 16:54:21,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 586 transitions, 8958 flow [2024-06-21 16:54:27,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 586 transitions, 8296 flow, removed 211 selfloop flow, removed 4 redundant places. [2024-06-21 16:54:27,979 INFO L231 Difference]: Finished difference. Result has 437 places, 568 transitions, 6648 flow [2024-06-21 16:54:27,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6648, PETRI_PLACES=437, PETRI_TRANSITIONS=568} [2024-06-21 16:54:27,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 16:54:27,979 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 568 transitions, 6648 flow [2024-06-21 16:54:27,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:27,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:27,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:27,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:54:27,980 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:54:27,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash -386019832, now seen corresponding path program 10 times [2024-06-21 16:54:27,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:27,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570921040] [2024-06-21 16:54:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:27,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570921040] [2024-06-21 16:54:28,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570921040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:28,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:28,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:28,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295583438] [2024-06-21 16:54:28,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:28,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:28,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 568 transitions, 6648 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:28,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:28,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:28,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:30,219 INFO L124 PetriNetUnfolderBase]: 3193/5130 cut-off events. [2024-06-21 16:54:30,219 INFO L125 PetriNetUnfolderBase]: For 1946459/1946474 co-relation queries the response was YES. [2024-06-21 16:54:30,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65543 conditions, 5130 events. 3193/5130 cut-off events. For 1946459/1946474 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31155 event pairs, 655 based on Foata normal form. 12/5134 useless extension candidates. Maximal degree in co-relation 65339. Up to 4359 conditions per place. [2024-06-21 16:54:30,308 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 452 selfloop transitions, 148 changer transitions 0/605 dead transitions. [2024-06-21 16:54:30,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 605 transitions, 9347 flow [2024-06-21 16:54:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:54:30,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:54:30,310 INFO L175 Difference]: Start difference. First operand has 437 places, 568 transitions, 6648 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:54:30,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 605 transitions, 9347 flow [2024-06-21 16:54:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 605 transitions, 9037 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-21 16:54:36,579 INFO L231 Difference]: Finished difference. Result has 440 places, 584 transitions, 7211 flow [2024-06-21 16:54:36,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7211, PETRI_PLACES=440, PETRI_TRANSITIONS=584} [2024-06-21 16:54:36,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-21 16:54:36,592 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 584 transitions, 7211 flow [2024-06-21 16:54:36,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:36,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:36,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:36,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:54:36,593 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:54:36,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -386465705, now seen corresponding path program 21 times [2024-06-21 16:54:36,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:36,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59481175] [2024-06-21 16:54:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:36,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:37,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:37,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59481175] [2024-06-21 16:54:37,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59481175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:37,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:37,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946389125] [2024-06-21 16:54:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:37,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:37,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:37,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:37,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 584 transitions, 7211 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:37,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:37,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:37,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:38,885 INFO L124 PetriNetUnfolderBase]: 3219/5206 cut-off events. [2024-06-21 16:54:38,886 INFO L125 PetriNetUnfolderBase]: For 1997754/1997761 co-relation queries the response was YES. [2024-06-21 16:54:38,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66961 conditions, 5206 events. 3219/5206 cut-off events. For 1997754/1997761 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 32049 event pairs, 682 based on Foata normal form. 5/5196 useless extension candidates. Maximal degree in co-relation 66755. Up to 4164 conditions per place. [2024-06-21 16:54:38,981 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 231 changer transitions 0/608 dead transitions. [2024-06-21 16:54:38,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 608 transitions, 9457 flow [2024-06-21 16:54:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:54:38,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:54:38,983 INFO L175 Difference]: Start difference. First operand has 440 places, 584 transitions, 7211 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:54:38,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 608 transitions, 9457 flow [2024-06-21 16:54:46,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 608 transitions, 9135 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-21 16:54:46,298 INFO L231 Difference]: Finished difference. Result has 445 places, 590 transitions, 7701 flow [2024-06-21 16:54:46,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7701, PETRI_PLACES=445, PETRI_TRANSITIONS=590} [2024-06-21 16:54:46,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-21 16:54:46,299 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 590 transitions, 7701 flow [2024-06-21 16:54:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:46,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:46,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:54:46,300 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:54:46,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash -63231917, now seen corresponding path program 22 times [2024-06-21 16:54:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:46,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938476894] [2024-06-21 16:54:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:47,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:47,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938476894] [2024-06-21 16:54:47,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938476894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:47,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:47,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:47,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698234705] [2024-06-21 16:54:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:47,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:47,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:47,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:47,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 590 transitions, 7701 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:47,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:47,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:47,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:48,887 INFO L124 PetriNetUnfolderBase]: 3213/5137 cut-off events. [2024-06-21 16:54:48,887 INFO L125 PetriNetUnfolderBase]: For 1994876/1994880 co-relation queries the response was YES. [2024-06-21 16:54:48,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66704 conditions, 5137 events. 3213/5137 cut-off events. For 1994876/1994880 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30842 event pairs, 716 based on Foata normal form. 3/5128 useless extension candidates. Maximal degree in co-relation 66497. Up to 4707 conditions per place. [2024-06-21 16:54:48,978 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 536 selfloop transitions, 61 changer transitions 0/602 dead transitions. [2024-06-21 16:54:48,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 602 transitions, 8935 flow [2024-06-21 16:54:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 16:54:48,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 16:54:48,979 INFO L175 Difference]: Start difference. First operand has 445 places, 590 transitions, 7701 flow. Second operand 9 states and 156 transitions. [2024-06-21 16:54:48,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 602 transitions, 8935 flow [2024-06-21 16:54:56,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 602 transitions, 8324 flow, removed 162 selfloop flow, removed 5 redundant places. [2024-06-21 16:54:56,139 INFO L231 Difference]: Finished difference. Result has 449 places, 590 transitions, 7218 flow [2024-06-21 16:54:56,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7218, PETRI_PLACES=449, PETRI_TRANSITIONS=590} [2024-06-21 16:54:56,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-21 16:54:56,142 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 590 transitions, 7218 flow [2024-06-21 16:54:56,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:56,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:56,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:56,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:54:56,142 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:54:56,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -386465302, now seen corresponding path program 11 times [2024-06-21 16:54:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545259500] [2024-06-21 16:54:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:57,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:57,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545259500] [2024-06-21 16:54:57,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545259500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:57,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:57,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828632264] [2024-06-21 16:54:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:57,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:57,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:57,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:57,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:54:57,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 590 transitions, 7218 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:57,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:57,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:54:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:58,399 INFO L124 PetriNetUnfolderBase]: 3239/5194 cut-off events. [2024-06-21 16:54:58,399 INFO L125 PetriNetUnfolderBase]: For 2037544/2037559 co-relation queries the response was YES. [2024-06-21 16:54:58,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66613 conditions, 5194 events. 3239/5194 cut-off events. For 2037544/2037559 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31552 event pairs, 660 based on Foata normal form. 12/5198 useless extension candidates. Maximal degree in co-relation 66405. Up to 4412 conditions per place. [2024-06-21 16:54:58,497 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 460 selfloop transitions, 152 changer transitions 0/617 dead transitions. [2024-06-21 16:54:58,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 617 transitions, 9669 flow [2024-06-21 16:54:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:54:58,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:54:58,499 INFO L175 Difference]: Start difference. First operand has 449 places, 590 transitions, 7218 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:54:58,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 617 transitions, 9669 flow [2024-06-21 16:55:06,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 617 transitions, 9539 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:55:06,067 INFO L231 Difference]: Finished difference. Result has 450 places, 596 transitions, 7598 flow [2024-06-21 16:55:06,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7088, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7598, PETRI_PLACES=450, PETRI_TRANSITIONS=596} [2024-06-21 16:55:06,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-21 16:55:06,067 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 596 transitions, 7598 flow [2024-06-21 16:55:06,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:06,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:06,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:06,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:55:06,068 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:55:06,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1138979110, now seen corresponding path program 12 times [2024-06-21 16:55:06,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:06,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538831155] [2024-06-21 16:55:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:06,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:06,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538831155] [2024-06-21 16:55:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538831155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:06,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:06,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:55:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132211767] [2024-06-21 16:55:06,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:55:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:55:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:55:07,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:55:07,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 596 transitions, 7598 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:07,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:07,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:55:07,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:08,327 INFO L124 PetriNetUnfolderBase]: 3249/5204 cut-off events. [2024-06-21 16:55:08,327 INFO L125 PetriNetUnfolderBase]: For 2064697/2064712 co-relation queries the response was YES. [2024-06-21 16:55:08,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67321 conditions, 5204 events. 3249/5204 cut-off events. For 2064697/2064712 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31569 event pairs, 666 based on Foata normal form. 12/5208 useless extension candidates. Maximal degree in co-relation 67112. Up to 4422 conditions per place. [2024-06-21 16:55:08,423 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 154 changer transitions 0/621 dead transitions. [2024-06-21 16:55:08,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 621 transitions, 9738 flow [2024-06-21 16:55:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:55:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:55:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:55:08,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:55:08,425 INFO L175 Difference]: Start difference. First operand has 450 places, 596 transitions, 7598 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:55:08,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 621 transitions, 9738 flow [2024-06-21 16:55:16,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 621 transitions, 9401 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:16,539 INFO L231 Difference]: Finished difference. Result has 454 places, 601 transitions, 7760 flow [2024-06-21 16:55:16,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7271, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7760, PETRI_PLACES=454, PETRI_TRANSITIONS=601} [2024-06-21 16:55:16,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-21 16:55:16,543 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 601 transitions, 7760 flow [2024-06-21 16:55:16,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:16,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:16,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:16,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:55:16,547 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:55:16,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash -827779186, now seen corresponding path program 13 times [2024-06-21 16:55:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:16,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689119483] [2024-06-21 16:55:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:17,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:17,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689119483] [2024-06-21 16:55:17,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689119483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:17,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:17,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:55:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031652343] [2024-06-21 16:55:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:17,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:55:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:55:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:55:17,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:55:17,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 601 transitions, 7760 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:55:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:18,937 INFO L124 PetriNetUnfolderBase]: 3243/5204 cut-off events. [2024-06-21 16:55:18,937 INFO L125 PetriNetUnfolderBase]: For 2065075/2065090 co-relation queries the response was YES. [2024-06-21 16:55:19,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67021 conditions, 5204 events. 3243/5204 cut-off events. For 2065075/2065090 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31682 event pairs, 628 based on Foata normal form. 12/5208 useless extension candidates. Maximal degree in co-relation 66811. Up to 4417 conditions per place. [2024-06-21 16:55:19,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 447 selfloop transitions, 169 changer transitions 0/621 dead transitions. [2024-06-21 16:55:19,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 621 transitions, 9719 flow [2024-06-21 16:55:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:55:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:55:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:55:19,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:55:19,026 INFO L175 Difference]: Start difference. First operand has 454 places, 601 transitions, 7760 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:55:19,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 621 transitions, 9719 flow [2024-06-21 16:55:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 621 transitions, 9272 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:26,759 INFO L231 Difference]: Finished difference. Result has 458 places, 601 transitions, 7657 flow [2024-06-21 16:55:26,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7657, PETRI_PLACES=458, PETRI_TRANSITIONS=601} [2024-06-21 16:55:26,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-21 16:55:26,759 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 601 transitions, 7657 flow [2024-06-21 16:55:26,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:26,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:26,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:26,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:55:26,760 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:55:26,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash 973543452, now seen corresponding path program 14 times [2024-06-21 16:55:26,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:26,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100227597] [2024-06-21 16:55:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:27,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:27,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100227597] [2024-06-21 16:55:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100227597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:27,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:27,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:55:27,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865861363] [2024-06-21 16:55:27,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:27,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:55:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:55:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:55:27,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:55:27,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 601 transitions, 7657 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:27,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:27,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:55:27,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:29,113 INFO L124 PetriNetUnfolderBase]: 3253/5200 cut-off events. [2024-06-21 16:55:29,113 INFO L125 PetriNetUnfolderBase]: For 2085318/2085333 co-relation queries the response was YES. [2024-06-21 16:55:29,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67118 conditions, 5200 events. 3253/5200 cut-off events. For 2085318/2085333 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31416 event pairs, 654 based on Foata normal form. 12/5204 useless extension candidates. Maximal degree in co-relation 66907. Up to 4427 conditions per place. [2024-06-21 16:55:29,207 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 156 changer transitions 0/624 dead transitions. [2024-06-21 16:55:29,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 624 transitions, 9736 flow [2024-06-21 16:55:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:55:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:55:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:55:29,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:55:29,208 INFO L175 Difference]: Start difference. First operand has 458 places, 601 transitions, 7657 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:55:29,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 624 transitions, 9736 flow [2024-06-21 16:55:37,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 624 transitions, 9431 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:55:37,187 INFO L231 Difference]: Finished difference. Result has 460 places, 604 transitions, 7780 flow [2024-06-21 16:55:37,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7355, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7780, PETRI_PLACES=460, PETRI_TRANSITIONS=604} [2024-06-21 16:55:37,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-21 16:55:37,187 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 604 transitions, 7780 flow [2024-06-21 16:55:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:37,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:37,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:37,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:55:37,188 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:55:37,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash -70474757, now seen corresponding path program 23 times [2024-06-21 16:55:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:37,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855814485] [2024-06-21 16:55:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:38,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855814485] [2024-06-21 16:55:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855814485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:38,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:55:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762065654] [2024-06-21 16:55:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:55:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:55:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:55:38,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:55:38,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 604 transitions, 7780 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:38,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:38,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:55:38,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:39,482 INFO L124 PetriNetUnfolderBase]: 3279/5266 cut-off events. [2024-06-21 16:55:39,483 INFO L125 PetriNetUnfolderBase]: For 2134926/2134933 co-relation queries the response was YES. [2024-06-21 16:55:39,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67965 conditions, 5266 events. 3279/5266 cut-off events. For 2134926/2134933 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 32099 event pairs, 701 based on Foata normal form. 5/5256 useless extension candidates. Maximal degree in co-relation 67753. Up to 4240 conditions per place. [2024-06-21 16:55:39,576 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 218 changer transitions 0/629 dead transitions. [2024-06-21 16:55:39,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 629 transitions, 10402 flow [2024-06-21 16:55:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:55:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:55:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:55:39,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:55:39,577 INFO L175 Difference]: Start difference. First operand has 460 places, 604 transitions, 7780 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:55:39,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 629 transitions, 10402 flow [2024-06-21 16:55:48,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 629 transitions, 10108 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:48,725 INFO L231 Difference]: Finished difference. Result has 464 places, 610 transitions, 8266 flow [2024-06-21 16:55:48,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7486, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8266, PETRI_PLACES=464, PETRI_TRANSITIONS=610} [2024-06-21 16:55:48,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 16:55:48,726 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 610 transitions, 8266 flow [2024-06-21 16:55:48,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:48,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:48,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:55:48,726 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:55:48,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1138533640, now seen corresponding path program 15 times [2024-06-21 16:55:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61611837] [2024-06-21 16:55:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:49,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:49,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61611837] [2024-06-21 16:55:49,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61611837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:49,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:49,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:55:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183649855] [2024-06-21 16:55:49,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:49,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:55:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:55:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:55:49,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:55:49,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 610 transitions, 8266 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:49,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:49,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:55:49,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:51,087 INFO L124 PetriNetUnfolderBase]: 3273/5250 cut-off events. [2024-06-21 16:55:51,088 INFO L125 PetriNetUnfolderBase]: For 2133590/2133605 co-relation queries the response was YES. [2024-06-21 16:55:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67875 conditions, 5250 events. 3273/5250 cut-off events. For 2133590/2133605 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31969 event pairs, 674 based on Foata normal form. 12/5254 useless extension candidates. Maximal degree in co-relation 67662. Up to 4458 conditions per place. [2024-06-21 16:55:51,183 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 154 changer transitions 0/630 dead transitions. [2024-06-21 16:55:51,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 630 transitions, 10255 flow [2024-06-21 16:55:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:55:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:55:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:55:51,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:55:51,184 INFO L175 Difference]: Start difference. First operand has 464 places, 610 transitions, 8266 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:55:51,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 630 transitions, 10255 flow [2024-06-21 16:56:00,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 630 transitions, 9684 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-21 16:56:00,350 INFO L231 Difference]: Finished difference. Result has 466 places, 610 transitions, 8009 flow [2024-06-21 16:56:00,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8009, PETRI_PLACES=466, PETRI_TRANSITIONS=610} [2024-06-21 16:56:00,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-21 16:56:00,350 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 610 transitions, 8009 flow [2024-06-21 16:56:00,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:00,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:00,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:56:00,351 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 973387739, now seen corresponding path program 24 times [2024-06-21 16:56:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97316220] [2024-06-21 16:56:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:01,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97316220] [2024-06-21 16:56:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97316220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:01,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:01,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382953886] [2024-06-21 16:56:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:01,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:01,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:01,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:01,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:01,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:56:01,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 610 transitions, 8009 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:01,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:01,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:56:01,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:02,731 INFO L124 PetriNetUnfolderBase]: 3267/5219 cut-off events. [2024-06-21 16:56:02,732 INFO L125 PetriNetUnfolderBase]: For 2126864/2126868 co-relation queries the response was YES. [2024-06-21 16:56:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67005 conditions, 5219 events. 3267/5219 cut-off events. For 2126864/2126868 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31385 event pairs, 725 based on Foata normal form. 3/5210 useless extension candidates. Maximal degree in co-relation 66793. Up to 4754 conditions per place. [2024-06-21 16:56:02,825 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 73 changer transitions 0/624 dead transitions. [2024-06-21 16:56:02,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 624 transitions, 9619 flow [2024-06-21 16:56:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:56:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:56:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:56:02,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 16:56:02,827 INFO L175 Difference]: Start difference. First operand has 466 places, 610 transitions, 8009 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:56:02,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 624 transitions, 9619 flow [2024-06-21 16:56:10,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 624 transitions, 9132 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:10,154 INFO L231 Difference]: Finished difference. Result has 469 places, 610 transitions, 7674 flow [2024-06-21 16:56:10,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7522, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7674, PETRI_PLACES=469, PETRI_TRANSITIONS=610} [2024-06-21 16:56:10,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-21 16:56:10,154 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 610 transitions, 7674 flow [2024-06-21 16:56:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:10,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:10,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:56:10,155 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:10,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash -63111544, now seen corresponding path program 16 times [2024-06-21 16:56:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:10,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702901278] [2024-06-21 16:56:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:10,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702901278] [2024-06-21 16:56:11,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702901278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:11,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:11,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:11,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636303545] [2024-06-21 16:56:11,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:11,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:11,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:11,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:11,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:11,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:56:11,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 610 transitions, 7674 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:11,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:11,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:56:11,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:12,495 INFO L124 PetriNetUnfolderBase]: 3261/5220 cut-off events. [2024-06-21 16:56:12,495 INFO L125 PetriNetUnfolderBase]: For 2122345/2122360 co-relation queries the response was YES. [2024-06-21 16:56:12,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66208 conditions, 5220 events. 3261/5220 cut-off events. For 2122345/2122360 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31646 event pairs, 652 based on Foata normal form. 12/5224 useless extension candidates. Maximal degree in co-relation 65995. Up to 4445 conditions per place. [2024-06-21 16:56:12,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 155 changer transitions 0/630 dead transitions. [2024-06-21 16:56:12,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 630 transitions, 9671 flow [2024-06-21 16:56:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:56:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:56:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:56:12,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:56:12,593 INFO L175 Difference]: Start difference. First operand has 469 places, 610 transitions, 7674 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:56:12,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 630 transitions, 9671 flow [2024-06-21 16:56:21,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 630 transitions, 9525 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:56:21,492 INFO L231 Difference]: Finished difference. Result has 470 places, 610 transitions, 7844 flow [2024-06-21 16:56:21,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7844, PETRI_PLACES=470, PETRI_TRANSITIONS=610} [2024-06-21 16:56:21,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 16:56:21,493 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 610 transitions, 7844 flow [2024-06-21 16:56:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:21,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:21,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:56:21,493 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:21,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash -563597225, now seen corresponding path program 25 times [2024-06-21 16:56:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898369274] [2024-06-21 16:56:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:22,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898369274] [2024-06-21 16:56:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898369274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:22,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:22,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:22,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457219920] [2024-06-21 16:56:22,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:22,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:22,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:22,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:56:22,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 610 transitions, 7844 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:22,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:22,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:56:22,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:23,803 INFO L124 PetriNetUnfolderBase]: 3255/5264 cut-off events. [2024-06-21 16:56:23,803 INFO L125 PetriNetUnfolderBase]: For 2125600/2125607 co-relation queries the response was YES. [2024-06-21 16:56:23,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66270 conditions, 5264 events. 3255/5264 cut-off events. For 2125600/2125607 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 32489 event pairs, 668 based on Foata normal form. 5/5254 useless extension candidates. Maximal degree in co-relation 66056. Up to 4214 conditions per place. [2024-06-21 16:56:23,899 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 232 changer transitions 0/629 dead transitions. [2024-06-21 16:56:23,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 629 transitions, 10152 flow [2024-06-21 16:56:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:56:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:56:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:56:23,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:56:23,901 INFO L175 Difference]: Start difference. First operand has 470 places, 610 transitions, 7844 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:56:23,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 629 transitions, 10152 flow [2024-06-21 16:56:32,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 629 transitions, 9854 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:32,209 INFO L231 Difference]: Finished difference. Result has 474 places, 610 transitions, 8016 flow [2024-06-21 16:56:32,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8016, PETRI_PLACES=474, PETRI_TRANSITIONS=610} [2024-06-21 16:56:32,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-21 16:56:32,210 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 610 transitions, 8016 flow [2024-06-21 16:56:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:32,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:32,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:56:32,210 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:32,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:32,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1138533237, now seen corresponding path program 26 times [2024-06-21 16:56:32,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:32,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502575671] [2024-06-21 16:56:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502575671] [2024-06-21 16:56:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502575671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:33,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:33,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791065162] [2024-06-21 16:56:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:33,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:33,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:56:33,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 610 transitions, 8016 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:33,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:33,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:56:33,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:34,734 INFO L124 PetriNetUnfolderBase]: 3249/5224 cut-off events. [2024-06-21 16:56:34,735 INFO L125 PetriNetUnfolderBase]: For 2121821/2121828 co-relation queries the response was YES. [2024-06-21 16:56:34,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66136 conditions, 5224 events. 3249/5224 cut-off events. For 2121821/2121828 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31877 event pairs, 688 based on Foata normal form. 5/5214 useless extension candidates. Maximal degree in co-relation 65921. Up to 4209 conditions per place. [2024-06-21 16:56:34,834 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 397 selfloop transitions, 226 changer transitions 0/628 dead transitions. [2024-06-21 16:56:34,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 628 transitions, 10002 flow [2024-06-21 16:56:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:56:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:56:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:56:34,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:56:34,835 INFO L175 Difference]: Start difference. First operand has 474 places, 610 transitions, 8016 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:56:34,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 628 transitions, 10002 flow [2024-06-21 16:56:43,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 628 transitions, 9216 flow, removed 128 selfloop flow, removed 7 redundant places. [2024-06-21 16:56:43,274 INFO L231 Difference]: Finished difference. Result has 476 places, 610 transitions, 7688 flow [2024-06-21 16:56:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7688, PETRI_PLACES=476, PETRI_TRANSITIONS=610} [2024-06-21 16:56:43,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-21 16:56:43,278 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 610 transitions, 7688 flow [2024-06-21 16:56:43,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:43,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:43,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:43,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:56:43,278 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:43,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash -70463597, now seen corresponding path program 27 times [2024-06-21 16:56:43,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:43,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873606368] [2024-06-21 16:56:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:43,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:44,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:44,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873606368] [2024-06-21 16:56:44,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873606368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:44,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:44,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:44,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673009752] [2024-06-21 16:56:44,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:44,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:56:44,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 610 transitions, 7688 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:44,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:44,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:56:44,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:45,638 INFO L124 PetriNetUnfolderBase]: 3243/5218 cut-off events. [2024-06-21 16:56:45,638 INFO L125 PetriNetUnfolderBase]: For 2112575/2112582 co-relation queries the response was YES. [2024-06-21 16:56:45,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65386 conditions, 5218 events. 3243/5218 cut-off events. For 2112575/2112582 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31813 event pairs, 690 based on Foata normal form. 5/5208 useless extension candidates. Maximal degree in co-relation 65170. Up to 4204 conditions per place. [2024-06-21 16:56:45,735 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 217 changer transitions 0/628 dead transitions. [2024-06-21 16:56:45,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 628 transitions, 9678 flow [2024-06-21 16:56:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:56:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:56:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:56:45,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:56:45,736 INFO L175 Difference]: Start difference. First operand has 476 places, 610 transitions, 7688 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:56:45,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 628 transitions, 9678 flow [2024-06-21 16:56:55,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 628 transitions, 8880 flow, removed 81 selfloop flow, removed 9 redundant places. [2024-06-21 16:56:55,174 INFO L231 Difference]: Finished difference. Result has 476 places, 610 transitions, 7330 flow [2024-06-21 16:56:55,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6890, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7330, PETRI_PLACES=476, PETRI_TRANSITIONS=610} [2024-06-21 16:56:55,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-21 16:56:55,175 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 610 transitions, 7330 flow [2024-06-21 16:56:55,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:55,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:55,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:55,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:56:55,175 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:56:55,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash 73415773, now seen corresponding path program 28 times [2024-06-21 16:56:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:55,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688188700] [2024-06-21 16:56:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688188700] [2024-06-21 16:56:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688188700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:56,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:56,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:56:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831471934] [2024-06-21 16:56:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:56,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:56:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:56:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:56:56,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:56:56,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 610 transitions, 7330 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:56,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:56,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:56:56,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:57,473 INFO L124 PetriNetUnfolderBase]: 3253/5232 cut-off events. [2024-06-21 16:56:57,473 INFO L125 PetriNetUnfolderBase]: For 2135483/2135490 co-relation queries the response was YES. [2024-06-21 16:56:57,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65188 conditions, 5232 events. 3253/5232 cut-off events. For 2135483/2135490 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31933 event pairs, 704 based on Foata normal form. 5/5222 useless extension candidates. Maximal degree in co-relation 64972. Up to 4214 conditions per place. [2024-06-21 16:56:57,566 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 225 changer transitions 0/631 dead transitions. [2024-06-21 16:56:57,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 631 transitions, 9488 flow [2024-06-21 16:56:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:56:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:56:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:56:57,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:56:57,567 INFO L175 Difference]: Start difference. First operand has 476 places, 610 transitions, 7330 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:56:57,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 631 transitions, 9488 flow [2024-06-21 16:57:06,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 631 transitions, 9098 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:57:06,042 INFO L231 Difference]: Finished difference. Result has 478 places, 613 transitions, 7554 flow [2024-06-21 16:57:06,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7554, PETRI_PLACES=478, PETRI_TRANSITIONS=613} [2024-06-21 16:57:06,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-21 16:57:06,042 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 613 transitions, 7554 flow [2024-06-21 16:57:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:06,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:06,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:06,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:57:06,043 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:06,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:06,043 INFO L85 PathProgramCache]: Analyzing trace with hash 73426933, now seen corresponding path program 29 times [2024-06-21 16:57:06,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:06,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748466125] [2024-06-21 16:57:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:06,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748466125] [2024-06-21 16:57:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748466125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:06,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701687318] [2024-06-21 16:57:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:06,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:06,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:07,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:57:07,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 613 transitions, 7554 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:07,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:07,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:57:07,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:08,406 INFO L124 PetriNetUnfolderBase]: 3247/5230 cut-off events. [2024-06-21 16:57:08,406 INFO L125 PetriNetUnfolderBase]: For 2132972/2132979 co-relation queries the response was YES. [2024-06-21 16:57:08,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64910 conditions, 5230 events. 3247/5230 cut-off events. For 2132972/2132979 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31973 event pairs, 704 based on Foata normal form. 5/5220 useless extension candidates. Maximal degree in co-relation 64693. Up to 4209 conditions per place. [2024-06-21 16:57:08,506 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 223 changer transitions 0/630 dead transitions. [2024-06-21 16:57:08,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 630 transitions, 9224 flow [2024-06-21 16:57:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:57:08,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 16:57:08,507 INFO L175 Difference]: Start difference. First operand has 478 places, 613 transitions, 7554 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:57:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 630 transitions, 9224 flow [2024-06-21 16:57:16,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 630 transitions, 8402 flow, removed 134 selfloop flow, removed 8 redundant places. [2024-06-21 16:57:16,743 INFO L231 Difference]: Finished difference. Result has 479 places, 613 transitions, 7184 flow [2024-06-21 16:57:16,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6732, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7184, PETRI_PLACES=479, PETRI_TRANSITIONS=613} [2024-06-21 16:57:16,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-21 16:57:16,744 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 613 transitions, 7184 flow [2024-06-21 16:57:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:16,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:16,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:16,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:57:16,744 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:16,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1125646630, now seen corresponding path program 17 times [2024-06-21 16:57:16,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:16,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13060427] [2024-06-21 16:57:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13060427] [2024-06-21 16:57:17,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13060427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:17,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:17,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468953456] [2024-06-21 16:57:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:17,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:17,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:57:17,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 613 transitions, 7184 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:17,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:17,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:57:17,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:19,171 INFO L124 PetriNetUnfolderBase]: 3241/5202 cut-off events. [2024-06-21 16:57:19,171 INFO L125 PetriNetUnfolderBase]: For 2119958/2119973 co-relation queries the response was YES. [2024-06-21 16:57:19,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64175 conditions, 5202 events. 3241/5202 cut-off events. For 2119958/2119973 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31657 event pairs, 661 based on Foata normal form. 12/5206 useless extension candidates. Maximal degree in co-relation 63957. Up to 4422 conditions per place. [2024-06-21 16:57:19,259 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 155 changer transitions 0/632 dead transitions. [2024-06-21 16:57:19,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 632 transitions, 8875 flow [2024-06-21 16:57:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:57:19,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:57:19,260 INFO L175 Difference]: Start difference. First operand has 479 places, 613 transitions, 7184 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:57:19,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 632 transitions, 8875 flow [2024-06-21 16:57:27,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 632 transitions, 8226 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-21 16:57:27,804 INFO L231 Difference]: Finished difference. Result has 478 places, 613 transitions, 6851 flow [2024-06-21 16:57:27,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6535, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6851, PETRI_PLACES=478, PETRI_TRANSITIONS=613} [2024-06-21 16:57:27,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-21 16:57:27,805 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 613 transitions, 6851 flow [2024-06-21 16:57:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:27,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:27,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:27,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:57:27,805 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:27,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash -563596822, now seen corresponding path program 18 times [2024-06-21 16:57:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255759044] [2024-06-21 16:57:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:28,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:28,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255759044] [2024-06-21 16:57:28,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255759044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:28,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189676893] [2024-06-21 16:57:28,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:28,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:57:28,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 613 transitions, 6851 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:28,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:28,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:57:28,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:30,065 INFO L124 PetriNetUnfolderBase]: 3235/5202 cut-off events. [2024-06-21 16:57:30,066 INFO L125 PetriNetUnfolderBase]: For 2115122/2115137 co-relation queries the response was YES. [2024-06-21 16:57:30,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63495 conditions, 5202 events. 3235/5202 cut-off events. For 2115122/2115137 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 31765 event pairs, 644 based on Foata normal form. 12/5206 useless extension candidates. Maximal degree in co-relation 63276. Up to 4417 conditions per place. [2024-06-21 16:57:30,170 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 160 changer transitions 0/632 dead transitions. [2024-06-21 16:57:30,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 632 transitions, 8544 flow [2024-06-21 16:57:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:57:30,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:57:30,172 INFO L175 Difference]: Start difference. First operand has 478 places, 613 transitions, 6851 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:57:30,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 632 transitions, 8544 flow [2024-06-21 16:57:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 632 transitions, 8220 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 16:57:38,801 INFO L231 Difference]: Finished difference. Result has 481 places, 613 transitions, 6853 flow [2024-06-21 16:57:38,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6527, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6853, PETRI_PLACES=481, PETRI_TRANSITIONS=613} [2024-06-21 16:57:38,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-21 16:57:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 613 transitions, 6853 flow [2024-06-21 16:57:38,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:38,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:38,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:57:38,803 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -135233242, now seen corresponding path program 19 times [2024-06-21 16:57:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166593300] [2024-06-21 16:57:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:38,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166593300] [2024-06-21 16:57:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166593300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:39,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:39,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:39,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107444900] [2024-06-21 16:57:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:39,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:39,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:57:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 613 transitions, 6853 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:39,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:39,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:57:39,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:41,075 INFO L124 PetriNetUnfolderBase]: 3245/5216 cut-off events. [2024-06-21 16:57:41,076 INFO L125 PetriNetUnfolderBase]: For 2139626/2139641 co-relation queries the response was YES. [2024-06-21 16:57:41,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63760 conditions, 5216 events. 3245/5216 cut-off events. For 2139626/2139641 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 31891 event pairs, 629 based on Foata normal form. 12/5220 useless extension candidates. Maximal degree in co-relation 63540. Up to 4427 conditions per place. [2024-06-21 16:57:41,172 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 176 changer transitions 0/636 dead transitions. [2024-06-21 16:57:41,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 636 transitions, 8687 flow [2024-06-21 16:57:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:57:41,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:57:41,173 INFO L175 Difference]: Start difference. First operand has 481 places, 613 transitions, 6853 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:57:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 636 transitions, 8687 flow [2024-06-21 16:57:49,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 636 transitions, 8341 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:57:49,737 INFO L231 Difference]: Finished difference. Result has 483 places, 617 transitions, 6996 flow [2024-06-21 16:57:49,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=483, PETRI_TRANSITIONS=617} [2024-06-21 16:57:49,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-21 16:57:49,738 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 617 transitions, 6996 flow [2024-06-21 16:57:49,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:49,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:57:49,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:57:49,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:57:49,739 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:57:49,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:57:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash -563717195, now seen corresponding path program 30 times [2024-06-21 16:57:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:57:49,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574591134] [2024-06-21 16:57:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:57:49,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:57:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:57:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:57:50,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:57:50,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574591134] [2024-06-21 16:57:50,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574591134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:57:50,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:57:50,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:57:50,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100558315] [2024-06-21 16:57:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:57:50,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:57:50,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:57:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:57:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:57:50,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:57:50,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 617 transitions, 6996 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:57:50,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:57:50,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:57:50,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:57:52,130 INFO L124 PetriNetUnfolderBase]: 3239/5187 cut-off events. [2024-06-21 16:57:52,130 INFO L125 PetriNetUnfolderBase]: For 2132369/2132373 co-relation queries the response was YES. [2024-06-21 16:57:52,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63458 conditions, 5187 events. 3239/5187 cut-off events. For 2132369/2132373 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31321 event pairs, 719 based on Foata normal form. 3/5178 useless extension candidates. Maximal degree in co-relation 63237. Up to 4747 conditions per place. [2024-06-21 16:57:52,227 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 64 changer transitions 0/629 dead transitions. [2024-06-21 16:57:52,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 629 transitions, 8284 flow [2024-06-21 16:57:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:57:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:57:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 16:57:52,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 16:57:52,230 INFO L175 Difference]: Start difference. First operand has 483 places, 617 transitions, 6996 flow. Second operand 9 states and 154 transitions. [2024-06-21 16:57:52,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 629 transitions, 8284 flow [2024-06-21 16:58:02,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 629 transitions, 7832 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-21 16:58:02,137 INFO L231 Difference]: Finished difference. Result has 487 places, 617 transitions, 6678 flow [2024-06-21 16:58:02,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6544, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6678, PETRI_PLACES=487, PETRI_TRANSITIONS=617} [2024-06-21 16:58:02,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-21 16:58:02,138 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 617 transitions, 6678 flow [2024-06-21 16:58:02,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:02,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:02,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:02,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:58:02,138 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:02,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash -563329912, now seen corresponding path program 20 times [2024-06-21 16:58:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:02,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247572635] [2024-06-21 16:58:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:02,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:03,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:03,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247572635] [2024-06-21 16:58:03,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247572635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:03,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:03,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:58:03,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120547071] [2024-06-21 16:58:03,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:03,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:58:03,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:58:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:58:03,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:58:03,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 617 transitions, 6678 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:03,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:03,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:58:03,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:04,430 INFO L124 PetriNetUnfolderBase]: 3233/5204 cut-off events. [2024-06-21 16:58:04,430 INFO L125 PetriNetUnfolderBase]: For 2124009/2124024 co-relation queries the response was YES. [2024-06-21 16:58:04,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62601 conditions, 5204 events. 3233/5204 cut-off events. For 2124009/2124024 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 31837 event pairs, 642 based on Foata normal form. 12/5208 useless extension candidates. Maximal degree in co-relation 62379. Up to 4414 conditions per place. [2024-06-21 16:58:04,530 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 166 changer transitions 0/635 dead transitions. [2024-06-21 16:58:04,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 635 transitions, 8041 flow [2024-06-21 16:58:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:58:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:58:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:58:04,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:58:04,531 INFO L175 Difference]: Start difference. First operand has 487 places, 617 transitions, 6678 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:58:04,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 635 transitions, 8041 flow [2024-06-21 16:58:13,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 635 transitions, 7813 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 16:58:13,588 INFO L231 Difference]: Finished difference. Result has 487 places, 617 transitions, 6788 flow [2024-06-21 16:58:13,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6788, PETRI_PLACES=487, PETRI_TRANSITIONS=617} [2024-06-21 16:58:13,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-21 16:58:13,590 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 617 transitions, 6788 flow [2024-06-21 16:58:13,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:13,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:13,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:13,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:58:13,591 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:13,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash -62834714, now seen corresponding path program 2 times [2024-06-21 16:58:13,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:13,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839965780] [2024-06-21 16:58:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:13,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:14,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:14,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839965780] [2024-06-21 16:58:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839965780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:14,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:58:14,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493111702] [2024-06-21 16:58:14,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:14,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:58:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:58:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:58:14,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:58:14,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 617 transitions, 6788 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:14,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:14,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:58:14,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:15,898 INFO L124 PetriNetUnfolderBase]: 3027/4911 cut-off events. [2024-06-21 16:58:15,898 INFO L125 PetriNetUnfolderBase]: For 2157658/2157688 co-relation queries the response was YES. [2024-06-21 16:58:15,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61414 conditions, 4911 events. 3027/4911 cut-off events. For 2157658/2157688 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 30209 event pairs, 651 based on Foata normal form. 11/4845 useless extension candidates. Maximal degree in co-relation 61191. Up to 4201 conditions per place. [2024-06-21 16:58:15,990 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 87 changer transitions 0/632 dead transitions. [2024-06-21 16:58:15,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 632 transitions, 8058 flow [2024-06-21 16:58:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:58:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:58:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:58:15,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 16:58:15,991 INFO L175 Difference]: Start difference. First operand has 487 places, 617 transitions, 6788 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:58:15,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 632 transitions, 8058 flow [2024-06-21 16:58:24,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 632 transitions, 7738 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:58:24,980 INFO L231 Difference]: Finished difference. Result has 490 places, 620 transitions, 6776 flow [2024-06-21 16:58:24,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6468, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6776, PETRI_PLACES=490, PETRI_TRANSITIONS=620} [2024-06-21 16:58:24,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-21 16:58:24,981 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 620 transitions, 6776 flow [2024-06-21 16:58:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:24,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:24,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:58:24,982 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:24,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -563319992, now seen corresponding path program 3 times [2024-06-21 16:58:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:24,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647592677] [2024-06-21 16:58:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:26,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:26,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647592677] [2024-06-21 16:58:26,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647592677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:26,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:26,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:58:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821258864] [2024-06-21 16:58:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:58:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:58:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:58:26,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:58:26,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 620 transitions, 6776 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:26,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:26,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:58:26,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:27,554 INFO L124 PetriNetUnfolderBase]: 3041/4925 cut-off events. [2024-06-21 16:58:27,555 INFO L125 PetriNetUnfolderBase]: For 2183347/2183377 co-relation queries the response was YES. [2024-06-21 16:58:27,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61836 conditions, 4925 events. 3041/4925 cut-off events. For 2183347/2183377 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 30196 event pairs, 651 based on Foata normal form. 11/4859 useless extension candidates. Maximal degree in co-relation 61612. Up to 4217 conditions per place. [2024-06-21 16:58:27,647 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 89 changer transitions 0/635 dead transitions. [2024-06-21 16:58:27,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 635 transitions, 8058 flow [2024-06-21 16:58:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:58:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:58:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 16:58:27,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 16:58:27,648 INFO L175 Difference]: Start difference. First operand has 490 places, 620 transitions, 6776 flow. Second operand 10 states and 177 transitions. [2024-06-21 16:58:27,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 635 transitions, 8058 flow [2024-06-21 16:58:36,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 635 transitions, 7772 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 16:58:36,717 INFO L231 Difference]: Finished difference. Result has 492 places, 623 transitions, 6808 flow [2024-06-21 16:58:36,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6808, PETRI_PLACES=492, PETRI_TRANSITIONS=623} [2024-06-21 16:58:36,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-21 16:58:36,718 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 623 transitions, 6808 flow [2024-06-21 16:58:36,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:36,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:36,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:36,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:58:36,718 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:36,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash -134790872, now seen corresponding path program 4 times [2024-06-21 16:58:36,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:36,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923236913] [2024-06-21 16:58:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:36,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:37,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923236913] [2024-06-21 16:58:37,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923236913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:37,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:37,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:58:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243922002] [2024-06-21 16:58:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:37,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:58:37,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:58:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:58:37,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:58:37,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 623 transitions, 6808 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:37,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:37,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:58:37,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:39,340 INFO L124 PetriNetUnfolderBase]: 3042/4937 cut-off events. [2024-06-21 16:58:39,340 INFO L125 PetriNetUnfolderBase]: For 2187621/2187655 co-relation queries the response was YES. [2024-06-21 16:58:39,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62063 conditions, 4937 events. 3042/4937 cut-off events. For 2187621/2187655 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 30409 event pairs, 610 based on Foata normal form. 14/4890 useless extension candidates. Maximal degree in co-relation 61838. Up to 4332 conditions per place. [2024-06-21 16:58:39,433 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 23 changer transitions 0/638 dead transitions. [2024-06-21 16:58:39,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 638 transitions, 8102 flow [2024-06-21 16:58:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:58:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:58:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 16:58:39,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:58:39,435 INFO L175 Difference]: Start difference. First operand has 492 places, 623 transitions, 6808 flow. Second operand 10 states and 170 transitions. [2024-06-21 16:58:39,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 638 transitions, 8102 flow [2024-06-21 16:58:51,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 638 transitions, 7806 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-21 16:58:51,240 INFO L231 Difference]: Finished difference. Result has 494 places, 626 transitions, 6704 flow [2024-06-21 16:58:51,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6512, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6704, PETRI_PLACES=494, PETRI_TRANSITIONS=626} [2024-06-21 16:58:51,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-21 16:58:51,240 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 626 transitions, 6704 flow [2024-06-21 16:58:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:51,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:58:51,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:58:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:58:51,241 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:58:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:58:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash -119986202, now seen corresponding path program 5 times [2024-06-21 16:58:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:58:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795602506] [2024-06-21 16:58:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:58:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:58:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:58:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:58:52,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:58:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795602506] [2024-06-21 16:58:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795602506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:58:52,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:58:52,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:58:52,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140325945] [2024-06-21 16:58:52,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:58:52,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:58:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:58:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:58:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:58:52,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:58:52,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 626 transitions, 6704 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:58:52,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:58:52,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:58:52,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:58:54,304 INFO L124 PetriNetUnfolderBase]: 3050/4947 cut-off events. [2024-06-21 16:58:54,305 INFO L125 PetriNetUnfolderBase]: For 2212041/2212061 co-relation queries the response was YES. [2024-06-21 16:58:54,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62361 conditions, 4947 events. 3050/4947 cut-off events. For 2212041/2212061 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 30463 event pairs, 611 based on Foata normal form. 19/4905 useless extension candidates. Maximal degree in co-relation 62135. Up to 4338 conditions per place. [2024-06-21 16:58:54,394 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 540 selfloop transitions, 29 changer transitions 0/642 dead transitions. [2024-06-21 16:58:54,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 642 transitions, 8014 flow [2024-06-21 16:58:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:58:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:58:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 16:58:54,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 16:58:54,395 INFO L175 Difference]: Start difference. First operand has 494 places, 626 transitions, 6704 flow. Second operand 11 states and 185 transitions. [2024-06-21 16:58:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 642 transitions, 8014 flow [2024-06-21 16:59:04,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 642 transitions, 7844 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 16:59:04,922 INFO L231 Difference]: Finished difference. Result has 497 places, 629 transitions, 6748 flow [2024-06-21 16:59:04,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6534, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6748, PETRI_PLACES=497, PETRI_TRANSITIONS=629} [2024-06-21 16:59:04,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-21 16:59:04,922 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 629 transitions, 6748 flow [2024-06-21 16:59:04,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:04,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:59:04,923 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -135223322, now seen corresponding path program 6 times [2024-06-21 16:59:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169669018] [2024-06-21 16:59:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:05,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:05,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169669018] [2024-06-21 16:59:05,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169669018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:05,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:05,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:59:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185123260] [2024-06-21 16:59:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:05,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:59:05,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:59:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:59:06,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:59:06,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 629 transitions, 6748 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:06,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:06,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:59:06,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:07,302 INFO L124 PetriNetUnfolderBase]: 3044/4931 cut-off events. [2024-06-21 16:59:07,302 INFO L125 PetriNetUnfolderBase]: For 2207529/2207549 co-relation queries the response was YES. [2024-06-21 16:59:07,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62127 conditions, 4931 events. 3044/4931 cut-off events. For 2207529/2207549 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 30293 event pairs, 652 based on Foata normal form. 19/4874 useless extension candidates. Maximal degree in co-relation 61900. Up to 4223 conditions per place. [2024-06-21 16:59:07,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 96 changer transitions 0/644 dead transitions. [2024-06-21 16:59:07,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 644 transitions, 8066 flow [2024-06-21 16:59:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:59:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:59:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 16:59:07,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:59:07,398 INFO L175 Difference]: Start difference. First operand has 497 places, 629 transitions, 6748 flow. Second operand 10 states and 176 transitions. [2024-06-21 16:59:07,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 644 transitions, 8066 flow [2024-06-21 16:59:16,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 644 transitions, 7874 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-21 16:59:16,293 INFO L231 Difference]: Finished difference. Result has 498 places, 632 transitions, 6906 flow [2024-06-21 16:59:16,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6906, PETRI_PLACES=498, PETRI_TRANSITIONS=632} [2024-06-21 16:59:16,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-21 16:59:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 632 transitions, 6906 flow [2024-06-21 16:59:16,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:16,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:16,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:59:16,294 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:16,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash 62064587, now seen corresponding path program 1 times [2024-06-21 16:59:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313828515] [2024-06-21 16:59:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:17,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:17,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313828515] [2024-06-21 16:59:17,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313828515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:17,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:17,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:17,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721225830] [2024-06-21 16:59:17,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:17,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:17,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:59:17,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 632 transitions, 6906 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:17,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:17,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:59:17,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:18,856 INFO L124 PetriNetUnfolderBase]: 3187/5150 cut-off events. [2024-06-21 16:59:18,856 INFO L125 PetriNetUnfolderBase]: For 2215545/2215549 co-relation queries the response was YES. [2024-06-21 16:59:18,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63901 conditions, 5150 events. 3187/5150 cut-off events. For 2215545/2215549 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 31635 event pairs, 606 based on Foata normal form. 3/5151 useless extension candidates. Maximal degree in co-relation 63673. Up to 4607 conditions per place. [2024-06-21 16:59:18,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 601 selfloop transitions, 17 changer transitions 0/657 dead transitions. [2024-06-21 16:59:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 657 transitions, 8298 flow [2024-06-21 16:59:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:59:18,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:59:18,949 INFO L175 Difference]: Start difference. First operand has 498 places, 632 transitions, 6906 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:59:18,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 657 transitions, 8298 flow [2024-06-21 16:59:30,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 657 transitions, 7976 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 16:59:30,079 INFO L231 Difference]: Finished difference. Result has 499 places, 634 transitions, 6719 flow [2024-06-21 16:59:30,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6719, PETRI_PLACES=499, PETRI_TRANSITIONS=634} [2024-06-21 16:59:30,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-21 16:59:30,079 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 634 transitions, 6719 flow [2024-06-21 16:59:30,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:30,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:30,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:30,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:59:30,080 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:30,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1061710901, now seen corresponding path program 2 times [2024-06-21 16:59:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:30,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586101082] [2024-06-21 16:59:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:30,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:30,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586101082] [2024-06-21 16:59:30,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586101082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:30,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:30,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365091366] [2024-06-21 16:59:30,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:30,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:30,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:31,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:59:31,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 634 transitions, 6719 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:31,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:31,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:59:31,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:32,476 INFO L124 PetriNetUnfolderBase]: 3195/5162 cut-off events. [2024-06-21 16:59:32,476 INFO L125 PetriNetUnfolderBase]: For 2236487/2236491 co-relation queries the response was YES. [2024-06-21 16:59:32,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63970 conditions, 5162 events. 3195/5162 cut-off events. For 2236487/2236491 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 31726 event pairs, 645 based on Foata normal form. 3/5163 useless extension candidates. Maximal degree in co-relation 63741. Up to 4641 conditions per place. [2024-06-21 16:59:32,574 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 596 selfloop transitions, 19 changer transitions 0/654 dead transitions. [2024-06-21 16:59:32,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 654 transitions, 8095 flow [2024-06-21 16:59:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:59:32,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:59:32,576 INFO L175 Difference]: Start difference. First operand has 499 places, 634 transitions, 6719 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:59:32,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 654 transitions, 8095 flow [2024-06-21 16:59:43,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 654 transitions, 7976 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:43,615 INFO L231 Difference]: Finished difference. Result has 501 places, 636 transitions, 6743 flow [2024-06-21 16:59:43,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6743, PETRI_PLACES=501, PETRI_TRANSITIONS=636} [2024-06-21 16:59:43,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-21 16:59:43,616 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 636 transitions, 6743 flow [2024-06-21 16:59:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:43,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:43,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:59:43,616 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:43,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1061563031, now seen corresponding path program 3 times [2024-06-21 16:59:43,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:43,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545152605] [2024-06-21 16:59:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:44,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:44,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545152605] [2024-06-21 16:59:44,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545152605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:44,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:44,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:44,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966024018] [2024-06-21 16:59:44,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:44,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:44,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:59:44,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 636 transitions, 6743 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:44,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:44,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:59:44,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:46,023 INFO L124 PetriNetUnfolderBase]: 3203/5174 cut-off events. [2024-06-21 16:59:46,024 INFO L125 PetriNetUnfolderBase]: For 2265718/2265722 co-relation queries the response was YES. [2024-06-21 16:59:46,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64244 conditions, 5174 events. 3203/5174 cut-off events. For 2265718/2265722 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 31778 event pairs, 643 based on Foata normal form. 3/5175 useless extension candidates. Maximal degree in co-relation 64014. Up to 4639 conditions per place. [2024-06-21 16:59:46,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 596 selfloop transitions, 22 changer transitions 0/657 dead transitions. [2024-06-21 16:59:46,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 657 transitions, 8131 flow [2024-06-21 16:59:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:59:46,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:59:46,123 INFO L175 Difference]: Start difference. First operand has 501 places, 636 transitions, 6743 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:59:46,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 657 transitions, 8131 flow [2024-06-21 16:59:56,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 657 transitions, 8004 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 16:59:56,902 INFO L231 Difference]: Finished difference. Result has 503 places, 638 transitions, 6769 flow [2024-06-21 16:59:56,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6616, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6769, PETRI_PLACES=503, PETRI_TRANSITIONS=638} [2024-06-21 16:59:56,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-21 16:59:56,903 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 638 transitions, 6769 flow [2024-06-21 16:59:56,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:56,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:59:56,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:59:56,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:59:56,904 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:59:56,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:59:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1566493331, now seen corresponding path program 4 times [2024-06-21 16:59:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:59:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864823685] [2024-06-21 16:59:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:59:56,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:59:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:59:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:59:57,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:59:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864823685] [2024-06-21 16:59:57,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864823685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:59:57,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:59:57,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:59:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44702571] [2024-06-21 16:59:57,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:59:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:59:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:59:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:59:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:59:58,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 16:59:58,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 638 transitions, 6769 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:59:58,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:59:58,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 16:59:58,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:59:59,424 INFO L124 PetriNetUnfolderBase]: 3216/5195 cut-off events. [2024-06-21 16:59:59,424 INFO L125 PetriNetUnfolderBase]: For 2289307/2289311 co-relation queries the response was YES. [2024-06-21 16:59:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64590 conditions, 5195 events. 3216/5195 cut-off events. For 2289307/2289311 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 31922 event pairs, 641 based on Foata normal form. 3/5192 useless extension candidates. Maximal degree in co-relation 64359. Up to 4657 conditions per place. [2024-06-21 16:59:59,525 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 590 selfloop transitions, 30 changer transitions 0/659 dead transitions. [2024-06-21 16:59:59,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 659 transitions, 8212 flow [2024-06-21 16:59:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:59:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:59:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:59:59,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:59:59,526 INFO L175 Difference]: Start difference. First operand has 503 places, 638 transitions, 6769 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:59:59,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 659 transitions, 8212 flow [2024-06-21 17:00:09,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 659 transitions, 8075 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 17:00:09,482 INFO L231 Difference]: Finished difference. Result has 506 places, 644 transitions, 6876 flow [2024-06-21 17:00:09,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6876, PETRI_PLACES=506, PETRI_TRANSITIONS=644} [2024-06-21 17:00:09,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-21 17:00:09,483 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 644 transitions, 6876 flow [2024-06-21 17:00:09,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:09,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:09,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 17:00:09,483 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:09,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash 204402017, now seen corresponding path program 5 times [2024-06-21 17:00:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988277872] [2024-06-21 17:00:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:09,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:10,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:10,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988277872] [2024-06-21 17:00:10,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988277872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:10,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:10,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:00:10,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163410509] [2024-06-21 17:00:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:00:10,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:00:10,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:00:10,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 17:00:10,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 644 transitions, 6876 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:10,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:10,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 17:00:10,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:12,168 INFO L124 PetriNetUnfolderBase]: 3224/5207 cut-off events. [2024-06-21 17:00:12,168 INFO L125 PetriNetUnfolderBase]: For 2314595/2314599 co-relation queries the response was YES. [2024-06-21 17:00:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65186 conditions, 5207 events. 3224/5207 cut-off events. For 2314595/2314599 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 32058 event pairs, 643 based on Foata normal form. 3/5204 useless extension candidates. Maximal degree in co-relation 64953. Up to 4669 conditions per place. [2024-06-21 17:00:12,276 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 593 selfloop transitions, 31 changer transitions 0/663 dead transitions. [2024-06-21 17:00:12,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 663 transitions, 8307 flow [2024-06-21 17:00:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:00:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:00:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:00:12,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:00:12,277 INFO L175 Difference]: Start difference. First operand has 506 places, 644 transitions, 6876 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:00:12,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 663 transitions, 8307 flow [2024-06-21 17:00:25,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 663 transitions, 8152 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:25,387 INFO L231 Difference]: Finished difference. Result has 510 places, 648 transitions, 6935 flow [2024-06-21 17:00:25,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6935, PETRI_PLACES=510, PETRI_TRANSITIONS=648} [2024-06-21 17:00:25,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-21 17:00:25,388 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 648 transitions, 6935 flow [2024-06-21 17:00:25,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:25,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:25,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 17:00:25,389 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:25,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1572003581, now seen corresponding path program 6 times [2024-06-21 17:00:25,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:25,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839009456] [2024-06-21 17:00:25,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:25,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:26,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:26,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839009456] [2024-06-21 17:00:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839009456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:26,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:26,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:00:26,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650111251] [2024-06-21 17:00:26,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:00:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:00:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:00:26,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 17:00:26,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 648 transitions, 6935 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:26,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:26,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 17:00:26,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:00:27,971 INFO L124 PetriNetUnfolderBase]: 3232/5219 cut-off events. [2024-06-21 17:00:27,971 INFO L125 PetriNetUnfolderBase]: For 2338602/2338606 co-relation queries the response was YES. [2024-06-21 17:00:28,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65464 conditions, 5219 events. 3232/5219 cut-off events. For 2338602/2338606 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 32081 event pairs, 641 based on Foata normal form. 3/5216 useless extension candidates. Maximal degree in co-relation 65230. Up to 4661 conditions per place. [2024-06-21 17:00:28,065 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 591 selfloop transitions, 36 changer transitions 0/666 dead transitions. [2024-06-21 17:00:28,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 666 transitions, 8343 flow [2024-06-21 17:00:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:00:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:00:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:00:28,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:00:28,066 INFO L175 Difference]: Start difference. First operand has 510 places, 648 transitions, 6935 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:00:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 666 transitions, 8343 flow [2024-06-21 17:00:39,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 666 transitions, 8196 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 17:00:39,439 INFO L231 Difference]: Finished difference. Result has 514 places, 650 transitions, 6981 flow [2024-06-21 17:00:39,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6788, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6981, PETRI_PLACES=514, PETRI_TRANSITIONS=650} [2024-06-21 17:00:39,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-21 17:00:39,439 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 650 transitions, 6981 flow [2024-06-21 17:00:39,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:39,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:00:39,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:00:39,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 17:00:39,440 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:00:39,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:00:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1566277850, now seen corresponding path program 1 times [2024-06-21 17:00:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:00:39,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571868952] [2024-06-21 17:00:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:00:39,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:00:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:00:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:00:40,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:00:40,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571868952] [2024-06-21 17:00:40,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571868952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:00:40,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:00:40,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:00:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879601518] [2024-06-21 17:00:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:00:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:00:40,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:00:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:00:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:00:40,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:00:40,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 650 transitions, 6981 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:00:40,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:00:40,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:00:40,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15