./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix038_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:19:58,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:19:58,111 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:19:58,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:19:58,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:19:58,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:19:58,143 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:19:58,143 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:19:58,144 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:19:58,144 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:19:58,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:19:58,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:19:58,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:19:58,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:19:58,145 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:19:58,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:19:58,146 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:19:58,146 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:19:58,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:19:58,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:19:58,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:19:58,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:19:58,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:19:58,148 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:19:58,148 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:19:58,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:19:58,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:19:58,148 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:19:58,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:19:58,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:19:58,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:19:58,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:19:58,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:19:58,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:19:58,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:19:58,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:19:58,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:19:58,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:19:58,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:19:58,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:19:58,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:19:58,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:19:58,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:19:58,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:19:58,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:19:58,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:19:58,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:19:58,398 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:19:58,398 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:19:58,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:19:59,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:19:59,601 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:19:59,602 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:19:59,613 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8932bec9/81806c555e2f45d481c7fbfa38b7ee12/FLAG814d6c7ab [2024-06-20 16:19:59,623 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8932bec9/81806c555e2f45d481c7fbfa38b7ee12 [2024-06-20 16:19:59,626 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:19:59,626 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:19:59,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 16:19:59,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:19:59,767 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:19:59,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:19:59,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:19:59,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:19:59,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:19:59" (1/2) ... [2024-06-20 16:19:59,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571a797c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:19:59, skipping insertion in model container [2024-06-20 16:19:59,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:19:59" (1/2) ... [2024-06-20 16:19:59,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49506119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:19:59, skipping insertion in model container [2024-06-20 16:19:59,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:19:59" (2/2) ... [2024-06-20 16:19:59,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571a797c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:19:59, skipping insertion in model container [2024-06-20 16:19:59,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:19:59" (2/2) ... [2024-06-20 16:19:59,775 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:19:59,839 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:19:59,840 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:19:59,840 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:19:59,840 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:19:59,841 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:19:59,841 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-20 16:19:59,879 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:20:00,205 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:20:00,217 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:20:00,309 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:20:00,371 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:20:00,372 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00 WrapperNode [2024-06-20 16:20:00,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:20:00,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:20:00,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:20:00,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:20:00,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,440 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-20 16:20:00,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:20:00,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:20:00,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:20:00,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:20:00,449 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,463 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,485 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]. [2024-06-20 16:20:00,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,485 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,503 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,505 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,507 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:20:00,508 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:20:00,508 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:20:00,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:20:00,509 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (1/1) ... [2024-06-20 16:20:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:20:00,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:20:00,537 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) [2024-06-20 16:20:00,553 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 [2024-06-20 16:20:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:20:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:20:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:20:00,578 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:20:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:20:00,578 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:20:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:20:00,578 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:20:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:20:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:20:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:20:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:20:00,580 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:20:00,713 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:20:00,715 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:20:01,025 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:20:01,026 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:20:01,196 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:20:01,196 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:20:01,197 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:20:01 BoogieIcfgContainer [2024-06-20 16:20:01,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:20:01,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:20:01,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:20:01,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:20:01,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:19:59" (1/4) ... [2024-06-20 16:20:01,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d2fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:20:01, skipping insertion in model container [2024-06-20 16:20:01,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:19:59" (2/4) ... [2024-06-20 16:20:01,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d2fff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:20:01, skipping insertion in model container [2024-06-20 16:20:01,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:20:00" (3/4) ... [2024-06-20 16:20:01,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d2fff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:20:01, skipping insertion in model container [2024-06-20 16:20:01,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:20:01" (4/4) ... [2024-06-20 16:20:01,204 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:20:01,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:20:01,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:20:01,219 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:20:01,259 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:20:01,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:20:01,315 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:20:01,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:20:01,318 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 68 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. [2024-06-20 16:20:01,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:20:01,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:20:01,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:20:01,335 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;@7f998b43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:20:01,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:20:01,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:20:01,344 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:20:01,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:20:01,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:01,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:20:01,345 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)] === [2024-06-20 16:20:01,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-20 16:20:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:01,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467053534] [2024-06-20 16:20:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:02,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:02,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467053534] [2024-06-20 16:20:02,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467053534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:02,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:02,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:20:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249269675] [2024-06-20 16:20:02,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:02,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:20:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:20:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:20:02,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:20:02,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:20:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:02,761 INFO L124 PetriNetUnfolderBase]: 1570/2419 cut-off events. [2024-06-20 16:20:02,761 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-20 16:20:02,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 2419 events. 1570/2419 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11765 event pairs, 1123 based on Foata normal form. 1/2344 useless extension candidates. Maximal degree in co-relation 4828. Up to 2334 conditions per place. [2024-06-20 16:20:02,779 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 16:20:02,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-20 16:20:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:20:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:20:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-20 16:20:02,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-20 16:20:02,791 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-20 16:20:02,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-20 16:20:02,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:02,796 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:20:02,798 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} [2024-06-20 16:20:02,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:20:02,801 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:20:02,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:02,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:02,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:20:02,802 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)] === [2024-06-20 16:20:02,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-20 16:20:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:02,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30243705] [2024-06-20 16:20:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:02,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:03,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30243705] [2024-06-20 16:20:03,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30243705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:03,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:03,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:20:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693379978] [2024-06-20 16:20:03,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:20:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:20:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:20:03,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:20:03,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:03,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:03,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:20:03,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:03,839 INFO L124 PetriNetUnfolderBase]: 1564/2415 cut-off events. [2024-06-20 16:20:03,839 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-06-20 16:20:03,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 2415 events. 1564/2415 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11736 event pairs, 981 based on Foata normal form. 3/2381 useless extension candidates. Maximal degree in co-relation 5430. Up to 2310 conditions per place. [2024-06-20 16:20:03,851 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 16:20:03,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-20 16:20:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:20:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:20:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 16:20:03,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 16:20:03,853 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-20 16:20:03,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-20 16:20:03,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:20:03,855 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:20:03,855 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} [2024-06-20 16:20:03,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:20:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:20:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:03,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:03,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:03,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:20:03,857 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)] === [2024-06-20 16:20:03,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash 29058686, now seen corresponding path program 1 times [2024-06-20 16:20:03,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:03,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375757502] [2024-06-20 16:20:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:04,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375757502] [2024-06-20 16:20:04,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375757502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:04,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:04,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:20:04,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202280987] [2024-06-20 16:20:04,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:04,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:20:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:20:04,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:20:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:20:04,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:04,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:04,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:20:04,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:04,876 INFO L124 PetriNetUnfolderBase]: 1618/2518 cut-off events. [2024-06-20 16:20:04,876 INFO L125 PetriNetUnfolderBase]: For 1322/1322 co-relation queries the response was YES. [2024-06-20 16:20:04,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 2518 events. 1618/2518 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12392 event pairs, 739 based on Foata normal form. 7/2510 useless extension candidates. Maximal degree in co-relation 6255. Up to 2279 conditions per place. [2024-06-20 16:20:04,888 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-20 16:20:04,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 404 flow [2024-06-20 16:20:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:20:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:20:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 16:20:04,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 16:20:04,890 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 130 transitions. [2024-06-20 16:20:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 404 flow [2024-06-20 16:20:04,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:20:04,893 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 239 flow [2024-06-20 16:20:04,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-20 16:20:04,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 16:20:04,894 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 239 flow [2024-06-20 16:20:04,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:04,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:04,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:04,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:20:04,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:04,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:04,895 INFO L85 PathProgramCache]: Analyzing trace with hash 817703349, now seen corresponding path program 1 times [2024-06-20 16:20:04,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:04,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999996085] [2024-06-20 16:20:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999996085] [2024-06-20 16:20:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999996085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:05,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:05,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:20:05,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784067197] [2024-06-20 16:20:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:05,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:20:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:20:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:20:05,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:20:05,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:05,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:05,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:20:05,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:06,262 INFO L124 PetriNetUnfolderBase]: 1640/2541 cut-off events. [2024-06-20 16:20:06,262 INFO L125 PetriNetUnfolderBase]: For 3272/3272 co-relation queries the response was YES. [2024-06-20 16:20:06,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 2541 events. 1640/2541 cut-off events. For 3272/3272 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12674 event pairs, 559 based on Foata normal form. 7/2538 useless extension candidates. Maximal degree in co-relation 7641. Up to 2222 conditions per place. [2024-06-20 16:20:06,277 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-20 16:20:06,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 633 flow [2024-06-20 16:20:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 16:20:06,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-20 16:20:06,279 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 239 flow. Second operand 6 states and 157 transitions. [2024-06-20 16:20:06,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 633 flow [2024-06-20 16:20:06,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 625 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 16:20:06,283 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 418 flow [2024-06-20 16:20:06,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-20 16:20:06,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-20 16:20:06,284 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 418 flow [2024-06-20 16:20:06,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:06,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:06,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:20:06,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:06,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342659, now seen corresponding path program 1 times [2024-06-20 16:20:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992894595] [2024-06-20 16:20:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:07,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:07,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992894595] [2024-06-20 16:20:07,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992894595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:07,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:07,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351622660] [2024-06-20 16:20:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:07,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:07,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:20:07,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:07,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:07,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:20:07,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:07,801 INFO L124 PetriNetUnfolderBase]: 1722/2703 cut-off events. [2024-06-20 16:20:07,802 INFO L125 PetriNetUnfolderBase]: For 6407/6407 co-relation queries the response was YES. [2024-06-20 16:20:07,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 2703 events. 1722/2703 cut-off events. For 6407/6407 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13849 event pairs, 410 based on Foata normal form. 26/2717 useless extension candidates. Maximal degree in co-relation 9488. Up to 2186 conditions per place. [2024-06-20 16:20:07,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-20 16:20:07,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 808 flow [2024-06-20 16:20:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:20:07,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 16:20:07,823 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 418 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:20:07,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 808 flow [2024-06-20 16:20:07,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 792 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-20 16:20:07,834 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 484 flow [2024-06-20 16:20:07,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-20 16:20:07,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 16:20:07,836 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 484 flow [2024-06-20 16:20:07,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:07,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:07,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:20:07,840 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)] === [2024-06-20 16:20:07,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash -856778795, now seen corresponding path program 1 times [2024-06-20 16:20:07,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:07,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771881932] [2024-06-20 16:20:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:07,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:08,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771881932] [2024-06-20 16:20:08,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771881932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:08,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:08,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:20:08,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470499150] [2024-06-20 16:20:08,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:08,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:20:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:20:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:20:08,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:08,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 484 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:08,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:08,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:08,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:08,859 INFO L124 PetriNetUnfolderBase]: 1712/2693 cut-off events. [2024-06-20 16:20:08,860 INFO L125 PetriNetUnfolderBase]: For 7879/7879 co-relation queries the response was YES. [2024-06-20 16:20:08,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 2693 events. 1712/2693 cut-off events. For 7879/7879 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13722 event pairs, 618 based on Foata normal form. 4/2688 useless extension candidates. Maximal degree in co-relation 9948. Up to 2551 conditions per place. [2024-06-20 16:20:08,882 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-20 16:20:08,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 652 flow [2024-06-20 16:20:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:20:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:20:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-20 16:20:08,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-20 16:20:08,883 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 484 flow. Second operand 5 states and 97 transitions. [2024-06-20 16:20:08,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 652 flow [2024-06-20 16:20:08,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 582 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:08,891 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 444 flow [2024-06-20 16:20:08,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-20 16:20:08,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 16:20:08,894 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 444 flow [2024-06-20 16:20:08,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:08,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:08,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:08,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:20:08,894 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)] === [2024-06-20 16:20:08,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash -189988078, now seen corresponding path program 1 times [2024-06-20 16:20:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262416118] [2024-06-20 16:20:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262416118] [2024-06-20 16:20:09,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262416118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:09,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:09,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:09,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962777195] [2024-06-20 16:20:09,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:09,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:09,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:09,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:09,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:09,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:09,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:09,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:10,047 INFO L124 PetriNetUnfolderBase]: 1724/2704 cut-off events. [2024-06-20 16:20:10,047 INFO L125 PetriNetUnfolderBase]: For 8890/8890 co-relation queries the response was YES. [2024-06-20 16:20:10,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 2704 events. 1724/2704 cut-off events. For 8890/8890 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13738 event pairs, 550 based on Foata normal form. 8/2698 useless extension candidates. Maximal degree in co-relation 9971. Up to 2449 conditions per place. [2024-06-20 16:20:10,059 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-20 16:20:10,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 726 flow [2024-06-20 16:20:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-20 16:20:10,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-20 16:20:10,062 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 444 flow. Second operand 6 states and 124 transitions. [2024-06-20 16:20:10,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 726 flow [2024-06-20 16:20:10,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 696 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:10,069 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 496 flow [2024-06-20 16:20:10,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=496, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-20 16:20:10,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-20 16:20:10,070 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 496 flow [2024-06-20 16:20:10,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:10,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:10,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:20:10,071 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)] === [2024-06-20 16:20:10,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1269334708, now seen corresponding path program 2 times [2024-06-20 16:20:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:10,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611649846] [2024-06-20 16:20:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:10,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611649846] [2024-06-20 16:20:10,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611649846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:10,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:10,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:10,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118828115] [2024-06-20 16:20:10,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:10,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:10,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:10,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:10,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 496 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:10,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:10,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:10,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:11,236 INFO L124 PetriNetUnfolderBase]: 1701/2670 cut-off events. [2024-06-20 16:20:11,237 INFO L125 PetriNetUnfolderBase]: For 10133/10133 co-relation queries the response was YES. [2024-06-20 16:20:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10144 conditions, 2670 events. 1701/2670 cut-off events. For 10133/10133 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13488 event pairs, 598 based on Foata normal form. 4/2661 useless extension candidates. Maximal degree in co-relation 10115. Up to 2523 conditions per place. [2024-06-20 16:20:11,247 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-20 16:20:11,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 694 flow [2024-06-20 16:20:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:20:11,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:20:11,253 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 496 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:20:11,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 694 flow [2024-06-20 16:20:11,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 665 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:11,263 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 497 flow [2024-06-20 16:20:11,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-20 16:20:11,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-20 16:20:11,263 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 497 flow [2024-06-20 16:20:11,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:11,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:11,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:11,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:20:11,264 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)] === [2024-06-20 16:20:11,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash -219368060, now seen corresponding path program 1 times [2024-06-20 16:20:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061364302] [2024-06-20 16:20:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061364302] [2024-06-20 16:20:12,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061364302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:12,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:12,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:12,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493629181] [2024-06-20 16:20:12,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:12,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:12,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:12,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:12,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:12,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:12,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:12,889 INFO L124 PetriNetUnfolderBase]: 2069/3186 cut-off events. [2024-06-20 16:20:12,889 INFO L125 PetriNetUnfolderBase]: For 13815/13815 co-relation queries the response was YES. [2024-06-20 16:20:12,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12107 conditions, 3186 events. 2069/3186 cut-off events. For 13815/13815 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15538 event pairs, 750 based on Foata normal form. 4/3172 useless extension candidates. Maximal degree in co-relation 12077. Up to 3038 conditions per place. [2024-06-20 16:20:12,902 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-20 16:20:12,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 771 flow [2024-06-20 16:20:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:20:12,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:20:12,903 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 497 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:20:12,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 771 flow [2024-06-20 16:20:12,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 717 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:12,913 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 538 flow [2024-06-20 16:20:12,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-20 16:20:12,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 16:20:12,913 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 538 flow [2024-06-20 16:20:12,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:12,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:12,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:12,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:20:12,914 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:12,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1517424716, now seen corresponding path program 1 times [2024-06-20 16:20:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:12,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346871437] [2024-06-20 16:20:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:12,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346871437] [2024-06-20 16:20:13,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346871437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:13,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:13,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:20:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931134022] [2024-06-20 16:20:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:13,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:20:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:20:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:20:13,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:13,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:13,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:13,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:13,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:14,019 INFO L124 PetriNetUnfolderBase]: 2066/3182 cut-off events. [2024-06-20 16:20:14,019 INFO L125 PetriNetUnfolderBase]: For 16063/16063 co-relation queries the response was YES. [2024-06-20 16:20:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12618 conditions, 3182 events. 2066/3182 cut-off events. For 16063/16063 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15513 event pairs, 767 based on Foata normal form. 1/3182 useless extension candidates. Maximal degree in co-relation 12587. Up to 3076 conditions per place. [2024-06-20 16:20:14,033 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-20 16:20:14,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 740 flow [2024-06-20 16:20:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:20:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:20:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-20 16:20:14,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-20 16:20:14,034 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 538 flow. Second operand 5 states and 88 transitions. [2024-06-20 16:20:14,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 740 flow [2024-06-20 16:20:14,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 699 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:14,045 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 549 flow [2024-06-20 16:20:14,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2024-06-20 16:20:14,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-20 16:20:14,046 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 549 flow [2024-06-20 16:20:14,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:14,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:14,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:14,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:20:14,046 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)] === [2024-06-20 16:20:14,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1018036495, now seen corresponding path program 1 times [2024-06-20 16:20:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:14,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149289412] [2024-06-20 16:20:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:14,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:14,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149289412] [2024-06-20 16:20:14,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149289412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:14,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:14,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147462299] [2024-06-20 16:20:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:15,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:15,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 549 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:15,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:15,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:15,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:15,534 INFO L124 PetriNetUnfolderBase]: 1955/3042 cut-off events. [2024-06-20 16:20:15,534 INFO L125 PetriNetUnfolderBase]: For 18341/18341 co-relation queries the response was YES. [2024-06-20 16:20:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12492 conditions, 3042 events. 1955/3042 cut-off events. For 18341/18341 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15473 event pairs, 618 based on Foata normal form. 4/3038 useless extension candidates. Maximal degree in co-relation 12460. Up to 2659 conditions per place. [2024-06-20 16:20:15,549 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 35 changer transitions 0/113 dead transitions. [2024-06-20 16:20:15,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 113 transitions, 971 flow [2024-06-20 16:20:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-20 16:20:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-20 16:20:15,550 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 549 flow. Second operand 7 states and 148 transitions. [2024-06-20 16:20:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 113 transitions, 971 flow [2024-06-20 16:20:15,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 941 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:15,563 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 651 flow [2024-06-20 16:20:15,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=651, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-20 16:20:15,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-20 16:20:15,564 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 651 flow [2024-06-20 16:20:15,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:15,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:15,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:15,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:20:15,564 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:15,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1017946285, now seen corresponding path program 2 times [2024-06-20 16:20:15,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:15,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788324735] [2024-06-20 16:20:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:16,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:16,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788324735] [2024-06-20 16:20:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788324735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:16,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:16,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:16,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908135933] [2024-06-20 16:20:16,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:16,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:16,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:16,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:16,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 651 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:16,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:16,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:16,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:17,073 INFO L124 PetriNetUnfolderBase]: 1945/3028 cut-off events. [2024-06-20 16:20:17,074 INFO L125 PetriNetUnfolderBase]: For 21746/21746 co-relation queries the response was YES. [2024-06-20 16:20:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13156 conditions, 3028 events. 1945/3028 cut-off events. For 21746/21746 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15386 event pairs, 631 based on Foata normal form. 4/3029 useless extension candidates. Maximal degree in co-relation 13123. Up to 2714 conditions per place. [2024-06-20 16:20:17,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 31 changer transitions 0/108 dead transitions. [2024-06-20 16:20:17,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 969 flow [2024-06-20 16:20:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 16:20:17,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-20 16:20:17,088 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 651 flow. Second operand 7 states and 143 transitions. [2024-06-20 16:20:17,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 969 flow [2024-06-20 16:20:17,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 909 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:17,105 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 661 flow [2024-06-20 16:20:17,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-20 16:20:17,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 16:20:17,106 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 661 flow [2024-06-20 16:20:17,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:17,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:17,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:17,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:20:17,107 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:17,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:17,107 INFO L85 PathProgramCache]: Analyzing trace with hash 811937631, now seen corresponding path program 1 times [2024-06-20 16:20:17,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:17,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521781769] [2024-06-20 16:20:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:17,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:18,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:18,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521781769] [2024-06-20 16:20:18,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521781769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:18,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:18,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:18,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845875561] [2024-06-20 16:20:18,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:18,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:18,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:18,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:18,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:18,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:18,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:18,727 INFO L124 PetriNetUnfolderBase]: 2101/3231 cut-off events. [2024-06-20 16:20:18,727 INFO L125 PetriNetUnfolderBase]: For 24962/24962 co-relation queries the response was YES. [2024-06-20 16:20:18,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14428 conditions, 3231 events. 2101/3231 cut-off events. For 24962/24962 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15760 event pairs, 748 based on Foata normal form. 2/3232 useless extension candidates. Maximal degree in co-relation 14393. Up to 3077 conditions per place. [2024-06-20 16:20:18,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-20 16:20:18,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 104 transitions, 948 flow [2024-06-20 16:20:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:20:18,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:20:18,744 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 661 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:20:18,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 104 transitions, 948 flow [2024-06-20 16:20:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 888 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:18,762 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 692 flow [2024-06-20 16:20:18,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2024-06-20 16:20:18,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-20 16:20:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 692 flow [2024-06-20 16:20:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:18,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:20:18,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -220560126, now seen corresponding path program 1 times [2024-06-20 16:20:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113152175] [2024-06-20 16:20:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:18,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113152175] [2024-06-20 16:20:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113152175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:19,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:19,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:19,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927355720] [2024-06-20 16:20:19,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:19,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:20:19,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 692 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:19,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:19,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:20:19,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:20,001 INFO L124 PetriNetUnfolderBase]: 2350/3499 cut-off events. [2024-06-20 16:20:20,001 INFO L125 PetriNetUnfolderBase]: For 32283/32283 co-relation queries the response was YES. [2024-06-20 16:20:20,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16050 conditions, 3499 events. 2350/3499 cut-off events. For 32283/32283 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16398 event pairs, 855 based on Foata normal form. 1/3499 useless extension candidates. Maximal degree in co-relation 16014. Up to 3481 conditions per place. [2024-06-20 16:20:20,017 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 82 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-06-20 16:20:20,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 96 transitions, 928 flow [2024-06-20 16:20:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 16:20:20,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:20:20,018 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 692 flow. Second operand 6 states and 96 transitions. [2024-06-20 16:20:20,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 96 transitions, 928 flow [2024-06-20 16:20:20,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 854 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:20:20,038 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 680 flow [2024-06-20 16:20:20,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-20 16:20:20,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-20 16:20:20,038 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 680 flow [2024-06-20 16:20:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:20,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:20,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:20,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:20:20,039 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)] === [2024-06-20 16:20:20,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1494419479, now seen corresponding path program 1 times [2024-06-20 16:20:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:20,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492476992] [2024-06-20 16:20:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:21,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492476992] [2024-06-20 16:20:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492476992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:21,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:21,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877270727] [2024-06-20 16:20:21,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:21,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:21,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:21,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:21,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 680 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:21,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:21,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:21,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:21,724 INFO L124 PetriNetUnfolderBase]: 2308/3600 cut-off events. [2024-06-20 16:20:21,724 INFO L125 PetriNetUnfolderBase]: For 40415/40415 co-relation queries the response was YES. [2024-06-20 16:20:21,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17029 conditions, 3600 events. 2308/3600 cut-off events. For 40415/40415 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19050 event pairs, 428 based on Foata normal form. 16/3608 useless extension candidates. Maximal degree in co-relation 16992. Up to 2649 conditions per place. [2024-06-20 16:20:21,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 33 changer transitions 0/137 dead transitions. [2024-06-20 16:20:21,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 137 transitions, 1190 flow [2024-06-20 16:20:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-20 16:20:21,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-20 16:20:21,744 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 680 flow. Second operand 8 states and 169 transitions. [2024-06-20 16:20:21,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 137 transitions, 1190 flow [2024-06-20 16:20:21,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 1150 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:21,773 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 808 flow [2024-06-20 16:20:21,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=808, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-20 16:20:21,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 16:20:21,774 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 808 flow [2024-06-20 16:20:21,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:21,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:21,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:21,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:20:21,775 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)] === [2024-06-20 16:20:21,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash 715151499, now seen corresponding path program 2 times [2024-06-20 16:20:21,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:21,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891837297] [2024-06-20 16:20:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:22,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:22,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891837297] [2024-06-20 16:20:22,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891837297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:22,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:22,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:22,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771976047] [2024-06-20 16:20:22,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:22,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:22,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:22,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:20:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 808 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:22,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:22,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:20:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:23,650 INFO L124 PetriNetUnfolderBase]: 2367/3701 cut-off events. [2024-06-20 16:20:23,650 INFO L125 PetriNetUnfolderBase]: For 46914/46914 co-relation queries the response was YES. [2024-06-20 16:20:23,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18107 conditions, 3701 events. 2367/3701 cut-off events. For 46914/46914 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19766 event pairs, 642 based on Foata normal form. 28/3726 useless extension candidates. Maximal degree in co-relation 18067. Up to 3111 conditions per place. [2024-06-20 16:20:23,669 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 96 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-20 16:20:23,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 138 transitions, 1223 flow [2024-06-20 16:20:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 16:20:23,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-20 16:20:23,672 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 808 flow. Second operand 9 states and 184 transitions. [2024-06-20 16:20:23,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 138 transitions, 1223 flow [2024-06-20 16:20:23,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 1191 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:23,708 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 886 flow [2024-06-20 16:20:23,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=886, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-20 16:20:23,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 16:20:23,708 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 886 flow [2024-06-20 16:20:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:23,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:23,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:23,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:20:23,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:23,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1741130063, now seen corresponding path program 1 times [2024-06-20 16:20:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489747538] [2024-06-20 16:20:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489747538] [2024-06-20 16:20:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489747538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:24,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:24,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462189283] [2024-06-20 16:20:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:24,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:24,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 886 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:24,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:24,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:24,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:24,965 INFO L124 PetriNetUnfolderBase]: 2529/3883 cut-off events. [2024-06-20 16:20:24,965 INFO L125 PetriNetUnfolderBase]: For 49707/49707 co-relation queries the response was YES. [2024-06-20 16:20:24,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19608 conditions, 3883 events. 2529/3883 cut-off events. For 49707/49707 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19621 event pairs, 887 based on Foata normal form. 1/3883 useless extension candidates. Maximal degree in co-relation 19566. Up to 3739 conditions per place. [2024-06-20 16:20:24,987 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 96 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2024-06-20 16:20:24,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 117 transitions, 1238 flow [2024-06-20 16:20:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:20:24,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:20:24,988 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 886 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:20:24,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 117 transitions, 1238 flow [2024-06-20 16:20:25,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 117 transitions, 1157 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:20:25,027 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 905 flow [2024-06-20 16:20:25,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=905, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-20 16:20:25,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-20 16:20:25,028 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 905 flow [2024-06-20 16:20:25,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:25,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:25,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:25,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:20:25,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:25,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1349835635, now seen corresponding path program 1 times [2024-06-20 16:20:25,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:25,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710231607] [2024-06-20 16:20:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:25,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:26,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:26,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710231607] [2024-06-20 16:20:26,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710231607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:26,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:26,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:26,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247065633] [2024-06-20 16:20:26,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:26,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:26,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:26,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:26,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 905 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:26,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:26,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:26,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:26,821 INFO L124 PetriNetUnfolderBase]: 2546/3910 cut-off events. [2024-06-20 16:20:26,822 INFO L125 PetriNetUnfolderBase]: For 54893/54893 co-relation queries the response was YES. [2024-06-20 16:20:26,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20034 conditions, 3910 events. 2546/3910 cut-off events. For 54893/54893 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19828 event pairs, 886 based on Foata normal form. 4/3913 useless extension candidates. Maximal degree in co-relation 19991. Up to 3737 conditions per place. [2024-06-20 16:20:26,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 16 changer transitions 0/128 dead transitions. [2024-06-20 16:20:26,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 128 transitions, 1246 flow [2024-06-20 16:20:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:20:26,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:20:26,846 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 905 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:20:26,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 128 transitions, 1246 flow [2024-06-20 16:20:26,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1216 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 16:20:26,889 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 949 flow [2024-06-20 16:20:26,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2024-06-20 16:20:26,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 16:20:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 949 flow [2024-06-20 16:20:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:26,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:26,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:20:26,890 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)] === [2024-06-20 16:20:26,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1580051555, now seen corresponding path program 2 times [2024-06-20 16:20:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952372108] [2024-06-20 16:20:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:27,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:27,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952372108] [2024-06-20 16:20:27,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952372108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:27,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:27,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:27,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221356651] [2024-06-20 16:20:27,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:27,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:27,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:27,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:27,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:27,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:27,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:27,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:28,634 INFO L124 PetriNetUnfolderBase]: 2563/3937 cut-off events. [2024-06-20 16:20:28,635 INFO L125 PetriNetUnfolderBase]: For 60997/60997 co-relation queries the response was YES. [2024-06-20 16:20:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20701 conditions, 3937 events. 2563/3937 cut-off events. For 60997/60997 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19970 event pairs, 830 based on Foata normal form. 4/3940 useless extension candidates. Maximal degree in co-relation 20656. Up to 3750 conditions per place. [2024-06-20 16:20:28,654 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-20 16:20:28,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 130 transitions, 1291 flow [2024-06-20 16:20:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:20:28,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:20:28,656 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 949 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:20:28,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 130 transitions, 1291 flow [2024-06-20 16:20:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1240 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:28,701 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 973 flow [2024-06-20 16:20:28,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=973, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2024-06-20 16:20:28,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 16:20:28,701 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 973 flow [2024-06-20 16:20:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:28,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:28,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:28,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:20:28,702 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)] === [2024-06-20 16:20:28,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:28,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754885, now seen corresponding path program 3 times [2024-06-20 16:20:28,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993249300] [2024-06-20 16:20:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:29,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:29,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993249300] [2024-06-20 16:20:29,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993249300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:29,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:29,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137495983] [2024-06-20 16:20:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:29,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:29,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:29,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:29,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 973 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:29,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:29,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:29,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:30,598 INFO L124 PetriNetUnfolderBase]: 2555/3925 cut-off events. [2024-06-20 16:20:30,598 INFO L125 PetriNetUnfolderBase]: For 66452/66452 co-relation queries the response was YES. [2024-06-20 16:20:30,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20981 conditions, 3925 events. 2555/3925 cut-off events. For 66452/66452 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19904 event pairs, 880 based on Foata normal form. 4/3928 useless extension candidates. Maximal degree in co-relation 20935. Up to 3716 conditions per place. [2024-06-20 16:20:30,615 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 104 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2024-06-20 16:20:30,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 132 transitions, 1325 flow [2024-06-20 16:20:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:20:30,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:20:30,617 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 973 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:20:30,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 132 transitions, 1325 flow [2024-06-20 16:20:30,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 1268 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:30,666 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 1010 flow [2024-06-20 16:20:30,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1010, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-06-20 16:20:30,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 16:20:30,667 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 1010 flow [2024-06-20 16:20:30,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:30,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:30,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:30,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:20:30,668 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)] === [2024-06-20 16:20:30,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754637, now seen corresponding path program 1 times [2024-06-20 16:20:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230186635] [2024-06-20 16:20:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230186635] [2024-06-20 16:20:31,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230186635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:31,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:31,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:31,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565361893] [2024-06-20 16:20:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:31,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:31,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:31,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:31,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:31,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:31,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:31,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:32,259 INFO L124 PetriNetUnfolderBase]: 2557/3940 cut-off events. [2024-06-20 16:20:32,260 INFO L125 PetriNetUnfolderBase]: For 72694/72696 co-relation queries the response was YES. [2024-06-20 16:20:32,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21393 conditions, 3940 events. 2557/3940 cut-off events. For 72694/72696 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20106 event pairs, 1340 based on Foata normal form. 4/3943 useless extension candidates. Maximal degree in co-relation 21346. Up to 3712 conditions per place. [2024-06-20 16:20:32,280 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 101 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-20 16:20:32,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 1365 flow [2024-06-20 16:20:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:20:32,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:20:32,282 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 1010 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:20:32,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 1365 flow [2024-06-20 16:20:32,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 132 transitions, 1293 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:32,372 INFO L231 Difference]: Finished difference. Result has 108 places, 112 transitions, 1060 flow [2024-06-20 16:20:32,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1060, PETRI_PLACES=108, PETRI_TRANSITIONS=112} [2024-06-20 16:20:32,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-20 16:20:32,373 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 1060 flow [2024-06-20 16:20:32,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:32,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:32,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:32,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:20:32,373 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)] === [2024-06-20 16:20:32,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1859571491, now seen corresponding path program 4 times [2024-06-20 16:20:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:32,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77388632] [2024-06-20 16:20:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:32,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:33,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:33,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77388632] [2024-06-20 16:20:33,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77388632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:33,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:33,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:33,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206005000] [2024-06-20 16:20:33,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:33,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:33,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:33,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 1060 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:33,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:33,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:33,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:34,146 INFO L124 PetriNetUnfolderBase]: 2549/3927 cut-off events. [2024-06-20 16:20:34,146 INFO L125 PetriNetUnfolderBase]: For 78411/78411 co-relation queries the response was YES. [2024-06-20 16:20:34,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21526 conditions, 3927 events. 2549/3927 cut-off events. For 78411/78411 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20041 event pairs, 1329 based on Foata normal form. 4/3930 useless extension candidates. Maximal degree in co-relation 21477. Up to 3705 conditions per place. [2024-06-20 16:20:34,223 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-20 16:20:34,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1467 flow [2024-06-20 16:20:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:20:34,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:20:34,225 INFO L175 Difference]: Start difference. First operand has 108 places, 112 transitions, 1060 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:20:34,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1467 flow [2024-06-20 16:20:34,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 142 transitions, 1416 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:34,295 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1141 flow [2024-06-20 16:20:34,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1141, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-20 16:20:34,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-20 16:20:34,295 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1141 flow [2024-06-20 16:20:34,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:34,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:34,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:34,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:20:34,296 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)] === [2024-06-20 16:20:34,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash 595480871, now seen corresponding path program 2 times [2024-06-20 16:20:34,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91912028] [2024-06-20 16:20:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:34,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:34,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91912028] [2024-06-20 16:20:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91912028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:34,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:34,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33310150] [2024-06-20 16:20:34,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:34,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:34,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:34,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1141 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:34,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:34,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:34,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:35,500 INFO L124 PetriNetUnfolderBase]: 2546/3923 cut-off events. [2024-06-20 16:20:35,500 INFO L125 PetriNetUnfolderBase]: For 84930/84930 co-relation queries the response was YES. [2024-06-20 16:20:35,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22078 conditions, 3923 events. 2546/3923 cut-off events. For 84930/84930 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 19979 event pairs, 1339 based on Foata normal form. 1/3923 useless extension candidates. Maximal degree in co-relation 22026. Up to 3776 conditions per place. [2024-06-20 16:20:35,520 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-06-20 16:20:35,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 125 transitions, 1401 flow [2024-06-20 16:20:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:20:35,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 16:20:35,522 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1141 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:20:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 125 transitions, 1401 flow [2024-06-20 16:20:35,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 125 transitions, 1306 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:35,615 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1076 flow [2024-06-20 16:20:35,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1076, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-20 16:20:35,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-20 16:20:35,616 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1076 flow [2024-06-20 16:20:35,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:35,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:35,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:35,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:20:35,617 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)] === [2024-06-20 16:20:35,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:35,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1746849935, now seen corresponding path program 1 times [2024-06-20 16:20:35,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:35,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646492572] [2024-06-20 16:20:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:36,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:36,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646492572] [2024-06-20 16:20:36,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646492572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:36,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:36,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689266850] [2024-06-20 16:20:36,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:36,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:36,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:36,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:36,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:36,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:36,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:36,973 INFO L124 PetriNetUnfolderBase]: 2551/3930 cut-off events. [2024-06-20 16:20:36,974 INFO L125 PetriNetUnfolderBase]: For 90290/90290 co-relation queries the response was YES. [2024-06-20 16:20:36,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22177 conditions, 3930 events. 2551/3930 cut-off events. For 90290/90290 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20025 event pairs, 1339 based on Foata normal form. 1/3930 useless extension candidates. Maximal degree in co-relation 22124. Up to 3770 conditions per place. [2024-06-20 16:20:37,002 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 113 selfloop transitions, 17 changer transitions 0/135 dead transitions. [2024-06-20 16:20:37,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 135 transitions, 1464 flow [2024-06-20 16:20:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:20:37,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:20:37,003 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1076 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:20:37,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 135 transitions, 1464 flow [2024-06-20 16:20:37,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 135 transitions, 1429 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:37,118 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 1139 flow [2024-06-20 16:20:37,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1139, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-20 16:20:37,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-20 16:20:37,119 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 1139 flow [2024-06-20 16:20:37,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:37,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:37,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:37,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:20:37,119 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)] === [2024-06-20 16:20:37,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1669790983, now seen corresponding path program 2 times [2024-06-20 16:20:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78839373] [2024-06-20 16:20:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:37,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:37,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78839373] [2024-06-20 16:20:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78839373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:37,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:37,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155987095] [2024-06-20 16:20:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:37,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 1139 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:37,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:37,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:37,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:38,368 INFO L124 PetriNetUnfolderBase]: 2548/3927 cut-off events. [2024-06-20 16:20:38,368 INFO L125 PetriNetUnfolderBase]: For 97659/97661 co-relation queries the response was YES. [2024-06-20 16:20:38,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22797 conditions, 3927 events. 2548/3927 cut-off events. For 97659/97661 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20053 event pairs, 1342 based on Foata normal form. 3/3929 useless extension candidates. Maximal degree in co-relation 22743. Up to 3767 conditions per place. [2024-06-20 16:20:38,391 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-20 16:20:38,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 131 transitions, 1411 flow [2024-06-20 16:20:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 16:20:38,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-20 16:20:38,392 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 1139 flow. Second operand 6 states and 103 transitions. [2024-06-20 16:20:38,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 131 transitions, 1411 flow [2024-06-20 16:20:38,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 131 transitions, 1366 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 16:20:38,502 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1134 flow [2024-06-20 16:20:38,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1134, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2024-06-20 16:20:38,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-20 16:20:38,502 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1134 flow [2024-06-20 16:20:38,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:38,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:38,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:38,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:20:38,503 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)] === [2024-06-20 16:20:38,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2043694165, now seen corresponding path program 1 times [2024-06-20 16:20:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:38,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913184145] [2024-06-20 16:20:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:39,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913184145] [2024-06-20 16:20:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913184145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:39,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003736412] [2024-06-20 16:20:39,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:39,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:39,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:39,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:20:39,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:39,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:39,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:20:39,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:40,012 INFO L124 PetriNetUnfolderBase]: 2671/4046 cut-off events. [2024-06-20 16:20:40,012 INFO L125 PetriNetUnfolderBase]: For 102838/102838 co-relation queries the response was YES. [2024-06-20 16:20:40,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23346 conditions, 4046 events. 2671/4046 cut-off events. For 102838/102838 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20022 event pairs, 1413 based on Foata normal form. 3/4048 useless extension candidates. Maximal degree in co-relation 23290. Up to 3997 conditions per place. [2024-06-20 16:20:40,035 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 119 selfloop transitions, 15 changer transitions 0/137 dead transitions. [2024-06-20 16:20:40,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1464 flow [2024-06-20 16:20:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:20:40,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 16:20:40,036 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1134 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:20:40,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1464 flow [2024-06-20 16:20:40,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 1416 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:40,127 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 1164 flow [2024-06-20 16:20:40,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-06-20 16:20:40,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 16:20:40,127 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 1164 flow [2024-06-20 16:20:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:40,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:40,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:40,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:20:40,128 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:40,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1418027047, now seen corresponding path program 1 times [2024-06-20 16:20:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353813982] [2024-06-20 16:20:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:40,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:40,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353813982] [2024-06-20 16:20:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353813982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:40,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:40,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:40,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566358399] [2024-06-20 16:20:40,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:40,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:40,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:40,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:40,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 1164 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:40,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:40,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:40,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:41,430 INFO L124 PetriNetUnfolderBase]: 2575/3952 cut-off events. [2024-06-20 16:20:41,431 INFO L125 PetriNetUnfolderBase]: For 109180/109188 co-relation queries the response was YES. [2024-06-20 16:20:41,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23619 conditions, 3952 events. 2575/3952 cut-off events. For 109180/109188 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 19997 event pairs, 823 based on Foata normal form. 10/3961 useless extension candidates. Maximal degree in co-relation 23563. Up to 3674 conditions per place. [2024-06-20 16:20:41,454 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 43 changer transitions 0/175 dead transitions. [2024-06-20 16:20:41,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 175 transitions, 1893 flow [2024-06-20 16:20:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:20:41,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:20:41,469 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 1164 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:20:41,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 175 transitions, 1893 flow [2024-06-20 16:20:41,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1837 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:41,583 INFO L231 Difference]: Finished difference. Result has 125 places, 147 transitions, 1460 flow [2024-06-20 16:20:41,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1460, PETRI_PLACES=125, PETRI_TRANSITIONS=147} [2024-06-20 16:20:41,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 16:20:41,584 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 147 transitions, 1460 flow [2024-06-20 16:20:41,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:41,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:41,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:41,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:20:41,584 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)] === [2024-06-20 16:20:41,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1137542995, now seen corresponding path program 2 times [2024-06-20 16:20:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:41,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169740746] [2024-06-20 16:20:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:41,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169740746] [2024-06-20 16:20:42,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169740746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:42,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:42,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:42,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618503111] [2024-06-20 16:20:42,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:42,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:42,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:42,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:42,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:42,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:42,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 147 transitions, 1460 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:42,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:42,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:42,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:43,099 INFO L124 PetriNetUnfolderBase]: 2711/4150 cut-off events. [2024-06-20 16:20:43,099 INFO L125 PetriNetUnfolderBase]: For 120927/120931 co-relation queries the response was YES. [2024-06-20 16:20:43,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26230 conditions, 4150 events. 2711/4150 cut-off events. For 120927/120931 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21173 event pairs, 1050 based on Foata normal form. 6/4151 useless extension candidates. Maximal degree in co-relation 26170. Up to 3770 conditions per place. [2024-06-20 16:20:43,127 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 64 changer transitions 0/211 dead transitions. [2024-06-20 16:20:43,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 2573 flow [2024-06-20 16:20:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:20:43,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-20 16:20:43,128 INFO L175 Difference]: Start difference. First operand has 125 places, 147 transitions, 1460 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:20:43,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 2573 flow [2024-06-20 16:20:43,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2434 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-20 16:20:43,275 INFO L231 Difference]: Finished difference. Result has 134 places, 180 transitions, 1952 flow [2024-06-20 16:20:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1952, PETRI_PLACES=134, PETRI_TRANSITIONS=180} [2024-06-20 16:20:43,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-20 16:20:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 180 transitions, 1952 flow [2024-06-20 16:20:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:43,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:43,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:20:43,277 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)] === [2024-06-20 16:20:43,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1425807105, now seen corresponding path program 1 times [2024-06-20 16:20:43,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:43,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570358640] [2024-06-20 16:20:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:44,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:44,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570358640] [2024-06-20 16:20:44,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570358640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:44,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:44,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:44,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979133197] [2024-06-20 16:20:44,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:44,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:44,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:44,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:44,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:44,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 180 transitions, 1952 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:44,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:44,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:44,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:45,231 INFO L124 PetriNetUnfolderBase]: 2914/4466 cut-off events. [2024-06-20 16:20:45,231 INFO L125 PetriNetUnfolderBase]: For 130909/130918 co-relation queries the response was YES. [2024-06-20 16:20:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28888 conditions, 4466 events. 2914/4466 cut-off events. For 130909/130918 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23096 event pairs, 1013 based on Foata normal form. 10/4471 useless extension candidates. Maximal degree in co-relation 28823. Up to 3848 conditions per place. [2024-06-20 16:20:45,260 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 173 selfloop transitions, 74 changer transitions 0/252 dead transitions. [2024-06-20 16:20:45,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 252 transitions, 3029 flow [2024-06-20 16:20:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:20:45,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 16:20:45,261 INFO L175 Difference]: Start difference. First operand has 134 places, 180 transitions, 1952 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:20:45,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 252 transitions, 3029 flow [2024-06-20 16:20:45,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 252 transitions, 2945 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:45,460 INFO L231 Difference]: Finished difference. Result has 143 places, 213 transitions, 2523 flow [2024-06-20 16:20:45,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2523, PETRI_PLACES=143, PETRI_TRANSITIONS=213} [2024-06-20 16:20:45,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-20 16:20:45,461 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 213 transitions, 2523 flow [2024-06-20 16:20:45,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:45,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:45,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:45,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:20:45,461 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)] === [2024-06-20 16:20:45,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:45,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1426016355, now seen corresponding path program 2 times [2024-06-20 16:20:45,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:45,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840410494] [2024-06-20 16:20:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:45,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:46,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:46,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840410494] [2024-06-20 16:20:46,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840410494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:46,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:46,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:46,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124859573] [2024-06-20 16:20:46,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:46,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:46,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:46,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:46,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 213 transitions, 2523 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:46,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:46,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:46,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:47,418 INFO L124 PetriNetUnfolderBase]: 3001/4603 cut-off events. [2024-06-20 16:20:47,418 INFO L125 PetriNetUnfolderBase]: For 143260/143269 co-relation queries the response was YES. [2024-06-20 16:20:47,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30769 conditions, 4603 events. 3001/4603 cut-off events. For 143260/143269 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23971 event pairs, 1011 based on Foata normal form. 10/4608 useless extension candidates. Maximal degree in co-relation 30700. Up to 3886 conditions per place. [2024-06-20 16:20:47,450 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 177 selfloop transitions, 80 changer transitions 0/262 dead transitions. [2024-06-20 16:20:47,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 262 transitions, 3423 flow [2024-06-20 16:20:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 16:20:47,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 16:20:47,452 INFO L175 Difference]: Start difference. First operand has 143 places, 213 transitions, 2523 flow. Second operand 9 states and 175 transitions. [2024-06-20 16:20:47,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 262 transitions, 3423 flow [2024-06-20 16:20:47,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 262 transitions, 3300 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:47,672 INFO L231 Difference]: Finished difference. Result has 150 places, 221 transitions, 2694 flow [2024-06-20 16:20:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2694, PETRI_PLACES=150, PETRI_TRANSITIONS=221} [2024-06-20 16:20:47,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 16:20:47,673 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 221 transitions, 2694 flow [2024-06-20 16:20:47,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:47,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:47,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:20:47,674 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)] === [2024-06-20 16:20:47,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1420444725, now seen corresponding path program 3 times [2024-06-20 16:20:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44940680] [2024-06-20 16:20:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:48,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44940680] [2024-06-20 16:20:48,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44940680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:48,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:48,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513951115] [2024-06-20 16:20:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:48,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:48,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 221 transitions, 2694 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:48,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:48,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:48,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:49,683 INFO L124 PetriNetUnfolderBase]: 3051/4669 cut-off events. [2024-06-20 16:20:49,683 INFO L125 PetriNetUnfolderBase]: For 153446/153452 co-relation queries the response was YES. [2024-06-20 16:20:49,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31875 conditions, 4669 events. 3051/4669 cut-off events. For 153446/153452 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24256 event pairs, 1048 based on Foata normal form. 8/4672 useless extension candidates. Maximal degree in co-relation 31804. Up to 4036 conditions per place. [2024-06-20 16:20:49,717 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 179 selfloop transitions, 88 changer transitions 0/272 dead transitions. [2024-06-20 16:20:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 272 transitions, 3601 flow [2024-06-20 16:20:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 16:20:49,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 16:20:49,718 INFO L175 Difference]: Start difference. First operand has 150 places, 221 transitions, 2694 flow. Second operand 9 states and 175 transitions. [2024-06-20 16:20:49,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 272 transitions, 3601 flow [2024-06-20 16:20:49,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 272 transitions, 3447 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:49,950 INFO L231 Difference]: Finished difference. Result has 155 places, 235 transitions, 2998 flow [2024-06-20 16:20:49,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2998, PETRI_PLACES=155, PETRI_TRANSITIONS=235} [2024-06-20 16:20:49,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-20 16:20:49,951 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 235 transitions, 2998 flow [2024-06-20 16:20:49,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:49,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:49,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:49,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:20:49,951 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)] === [2024-06-20 16:20:49,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1137841897, now seen corresponding path program 1 times [2024-06-20 16:20:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498559102] [2024-06-20 16:20:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:50,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:50,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498559102] [2024-06-20 16:20:50,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498559102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:50,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:50,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695160270] [2024-06-20 16:20:50,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:50,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:50,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:50,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:20:50,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 235 transitions, 2998 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:50,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:50,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:20:50,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:51,488 INFO L124 PetriNetUnfolderBase]: 3188/4811 cut-off events. [2024-06-20 16:20:51,488 INFO L125 PetriNetUnfolderBase]: For 161592/161598 co-relation queries the response was YES. [2024-06-20 16:20:51,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33304 conditions, 4811 events. 3188/4811 cut-off events. For 161592/161598 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24440 event pairs, 1232 based on Foata normal form. 7/4817 useless extension candidates. Maximal degree in co-relation 33230. Up to 4723 conditions per place. [2024-06-20 16:20:51,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 30 changer transitions 0/263 dead transitions. [2024-06-20 16:20:51,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 263 transitions, 3761 flow [2024-06-20 16:20:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:20:51,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:20:51,529 INFO L175 Difference]: Start difference. First operand has 155 places, 235 transitions, 2998 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:20:51,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 263 transitions, 3761 flow [2024-06-20 16:20:51,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 263 transitions, 3640 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:51,789 INFO L231 Difference]: Finished difference. Result has 160 places, 244 transitions, 3085 flow [2024-06-20 16:20:51,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3085, PETRI_PLACES=160, PETRI_TRANSITIONS=244} [2024-06-20 16:20:51,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 16:20:51,790 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 244 transitions, 3085 flow [2024-06-20 16:20:51,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:51,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:51,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:51,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:20:51,790 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)] === [2024-06-20 16:20:51,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1137841525, now seen corresponding path program 3 times [2024-06-20 16:20:51,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:51,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773625598] [2024-06-20 16:20:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:51,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:52,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773625598] [2024-06-20 16:20:52,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773625598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:52,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:52,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710458834] [2024-06-20 16:20:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:52,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:52,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:52,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:52,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:52,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 244 transitions, 3085 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:52,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:52,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:52,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:53,406 INFO L124 PetriNetUnfolderBase]: 3064/4682 cut-off events. [2024-06-20 16:20:53,406 INFO L125 PetriNetUnfolderBase]: For 170568/170577 co-relation queries the response was YES. [2024-06-20 16:20:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32967 conditions, 4682 events. 3064/4682 cut-off events. For 170568/170577 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24265 event pairs, 1094 based on Foata normal form. 10/4687 useless extension candidates. Maximal degree in co-relation 32891. Up to 4289 conditions per place. [2024-06-20 16:20:53,443 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 64 changer transitions 0/267 dead transitions. [2024-06-20 16:20:53,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 267 transitions, 3841 flow [2024-06-20 16:20:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:20:53,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:20:53,444 INFO L175 Difference]: Start difference. First operand has 160 places, 244 transitions, 3085 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:20:53,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 267 transitions, 3841 flow [2024-06-20 16:20:53,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 267 transitions, 3762 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 16:20:53,717 INFO L231 Difference]: Finished difference. Result has 167 places, 245 transitions, 3179 flow [2024-06-20 16:20:53,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3179, PETRI_PLACES=167, PETRI_TRANSITIONS=245} [2024-06-20 16:20:53,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-20 16:20:53,718 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 245 transitions, 3179 flow [2024-06-20 16:20:53,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:53,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:53,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:53,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:20:53,718 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)] === [2024-06-20 16:20:53,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash 801510899, now seen corresponding path program 4 times [2024-06-20 16:20:53,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:53,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005237331] [2024-06-20 16:20:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005237331] [2024-06-20 16:20:54,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005237331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:54,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:54,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:20:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728278397] [2024-06-20 16:20:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:54,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:20:54,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:54,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:20:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:20:54,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:54,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 245 transitions, 3179 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:54,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:54,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:54,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:55,372 INFO L124 PetriNetUnfolderBase]: 3074/4694 cut-off events. [2024-06-20 16:20:55,372 INFO L125 PetriNetUnfolderBase]: For 179651/179659 co-relation queries the response was YES. [2024-06-20 16:20:55,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33604 conditions, 4694 events. 3074/4694 cut-off events. For 179651/179659 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24339 event pairs, 1086 based on Foata normal form. 10/4699 useless extension candidates. Maximal degree in co-relation 33525. Up to 4299 conditions per place. [2024-06-20 16:20:55,412 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 78 changer transitions 0/272 dead transitions. [2024-06-20 16:20:55,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 3999 flow [2024-06-20 16:20:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:20:55,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-20 16:20:55,414 INFO L175 Difference]: Start difference. First operand has 167 places, 245 transitions, 3179 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:20:55,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 3999 flow [2024-06-20 16:20:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 272 transitions, 3857 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:55,716 INFO L231 Difference]: Finished difference. Result has 170 places, 250 transitions, 3324 flow [2024-06-20 16:20:55,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3324, PETRI_PLACES=170, PETRI_TRANSITIONS=250} [2024-06-20 16:20:55,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 16:20:55,717 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 250 transitions, 3324 flow [2024-06-20 16:20:55,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:55,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:55,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:20:55,718 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:55,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1656274241, now seen corresponding path program 4 times [2024-06-20 16:20:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954659932] [2024-06-20 16:20:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:56,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:56,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954659932] [2024-06-20 16:20:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954659932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:56,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505804734] [2024-06-20 16:20:56,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:56,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:56,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:56,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 250 transitions, 3324 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:56,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:56,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:57,587 INFO L124 PetriNetUnfolderBase]: 3127/4784 cut-off events. [2024-06-20 16:20:57,587 INFO L125 PetriNetUnfolderBase]: For 191316/191324 co-relation queries the response was YES. [2024-06-20 16:20:57,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34557 conditions, 4784 events. 3127/4784 cut-off events. For 191316/191324 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24963 event pairs, 1038 based on Foata normal form. 10/4789 useless extension candidates. Maximal degree in co-relation 34477. Up to 4097 conditions per place. [2024-06-20 16:20:57,620 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 96 changer transitions 0/291 dead transitions. [2024-06-20 16:20:57,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 291 transitions, 4198 flow [2024-06-20 16:20:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:20:57,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:20:57,622 INFO L175 Difference]: Start difference. First operand has 170 places, 250 transitions, 3324 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:20:57,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 291 transitions, 4198 flow [2024-06-20 16:20:57,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 291 transitions, 4057 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:58,000 INFO L231 Difference]: Finished difference. Result has 174 places, 261 transitions, 3614 flow [2024-06-20 16:20:58,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3614, PETRI_PLACES=174, PETRI_TRANSITIONS=261} [2024-06-20 16:20:58,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 16:20:58,000 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 261 transitions, 3614 flow [2024-06-20 16:20:58,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:58,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:58,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:58,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:20:58,001 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:58,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 285416331, now seen corresponding path program 5 times [2024-06-20 16:20:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:58,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439502208] [2024-06-20 16:20:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:59,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439502208] [2024-06-20 16:20:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439502208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191475943] [2024-06-20 16:20:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:59,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:20:59,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 261 transitions, 3614 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:59,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:59,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:20:59,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:00,114 INFO L124 PetriNetUnfolderBase]: 3139/4804 cut-off events. [2024-06-20 16:21:00,115 INFO L125 PetriNetUnfolderBase]: For 184952/184956 co-relation queries the response was YES. [2024-06-20 16:21:00,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34975 conditions, 4804 events. 3139/4804 cut-off events. For 184952/184956 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25126 event pairs, 1041 based on Foata normal form. 8/4807 useless extension candidates. Maximal degree in co-relation 34894. Up to 4110 conditions per place. [2024-06-20 16:21:00,153 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 106 changer transitions 0/296 dead transitions. [2024-06-20 16:21:00,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 296 transitions, 4380 flow [2024-06-20 16:21:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:21:00,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:21:00,154 INFO L175 Difference]: Start difference. First operand has 174 places, 261 transitions, 3614 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:21:00,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 296 transitions, 4380 flow [2024-06-20 16:21:00,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 296 transitions, 4135 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:00,530 INFO L231 Difference]: Finished difference. Result has 177 places, 264 transitions, 3655 flow [2024-06-20 16:21:00,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3655, PETRI_PLACES=177, PETRI_TRANSITIONS=264} [2024-06-20 16:21:00,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 16:21:00,531 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 264 transitions, 3655 flow [2024-06-20 16:21:00,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:00,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:00,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:00,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:21:00,531 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:00,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 582020595, now seen corresponding path program 6 times [2024-06-20 16:21:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:00,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548366672] [2024-06-20 16:21:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:00,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:01,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:01,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548366672] [2024-06-20 16:21:01,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548366672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:01,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:01,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:01,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135681742] [2024-06-20 16:21:01,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:01,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:01,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:01,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:01,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 264 transitions, 3655 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:01,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:01,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:01,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:02,650 INFO L124 PetriNetUnfolderBase]: 3156/4831 cut-off events. [2024-06-20 16:21:02,651 INFO L125 PetriNetUnfolderBase]: For 196179/196185 co-relation queries the response was YES. [2024-06-20 16:21:02,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35362 conditions, 4831 events. 3156/4831 cut-off events. For 196179/196185 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25298 event pairs, 1043 based on Foata normal form. 8/4834 useless extension candidates. Maximal degree in co-relation 35282. Up to 3924 conditions per place. [2024-06-20 16:21:02,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 110 changer transitions 0/297 dead transitions. [2024-06-20 16:21:02,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 297 transitions, 4430 flow [2024-06-20 16:21:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:21:02,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:21:02,689 INFO L175 Difference]: Start difference. First operand has 177 places, 264 transitions, 3655 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:21:02,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 297 transitions, 4430 flow [2024-06-20 16:21:03,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 297 transitions, 4188 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:03,089 INFO L231 Difference]: Finished difference. Result has 181 places, 268 transitions, 3765 flow [2024-06-20 16:21:03,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3765, PETRI_PLACES=181, PETRI_TRANSITIONS=268} [2024-06-20 16:21:03,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 16:21:03,089 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 268 transitions, 3765 flow [2024-06-20 16:21:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:03,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:03,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:03,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:21:03,090 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)] === [2024-06-20 16:21:03,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:03,090 INFO L85 PathProgramCache]: Analyzing trace with hash 801521501, now seen corresponding path program 2 times [2024-06-20 16:21:03,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:03,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979753704] [2024-06-20 16:21:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979753704] [2024-06-20 16:21:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979753704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:03,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:03,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:03,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501312465] [2024-06-20 16:21:03,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:03,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:03,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:03,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 268 transitions, 3765 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:03,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:03,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:03,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:04,720 INFO L124 PetriNetUnfolderBase]: 3281/4955 cut-off events. [2024-06-20 16:21:04,720 INFO L125 PetriNetUnfolderBase]: For 196584/196586 co-relation queries the response was YES. [2024-06-20 16:21:04,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36310 conditions, 4955 events. 3281/4955 cut-off events. For 196584/196586 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25373 event pairs, 1239 based on Foata normal form. 3/4957 useless extension candidates. Maximal degree in co-relation 36228. Up to 4864 conditions per place. [2024-06-20 16:21:04,761 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 250 selfloop transitions, 33 changer transitions 0/286 dead transitions. [2024-06-20 16:21:04,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 286 transitions, 4504 flow [2024-06-20 16:21:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:21:04,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:21:04,762 INFO L175 Difference]: Start difference. First operand has 181 places, 268 transitions, 3765 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:21:04,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 286 transitions, 4504 flow [2024-06-20 16:21:05,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 286 transitions, 4343 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:05,157 INFO L231 Difference]: Finished difference. Result has 183 places, 271 transitions, 3737 flow [2024-06-20 16:21:05,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3737, PETRI_PLACES=183, PETRI_TRANSITIONS=271} [2024-06-20 16:21:05,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 16:21:05,158 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 271 transitions, 3737 flow [2024-06-20 16:21:05,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:05,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:05,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:05,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:21:05,158 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)] === [2024-06-20 16:21:05,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:05,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1859542193, now seen corresponding path program 5 times [2024-06-20 16:21:05,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:05,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406298650] [2024-06-20 16:21:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:05,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406298650] [2024-06-20 16:21:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406298650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114150722] [2024-06-20 16:21:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:05,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:05,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 271 transitions, 3737 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:05,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:05,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:05,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:06,824 INFO L124 PetriNetUnfolderBase]: 3189/4870 cut-off events. [2024-06-20 16:21:06,824 INFO L125 PetriNetUnfolderBase]: For 194001/194007 co-relation queries the response was YES. [2024-06-20 16:21:06,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35887 conditions, 4870 events. 3189/4870 cut-off events. For 194001/194007 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25461 event pairs, 1103 based on Foata normal form. 8/4873 useless extension candidates. Maximal degree in co-relation 35804. Up to 4458 conditions per place. [2024-06-20 16:21:06,868 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 77 changer transitions 0/295 dead transitions. [2024-06-20 16:21:06,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 295 transitions, 4612 flow [2024-06-20 16:21:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:21:06,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 16:21:06,869 INFO L175 Difference]: Start difference. First operand has 183 places, 271 transitions, 3737 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:21:06,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 295 transitions, 4612 flow [2024-06-20 16:21:07,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 295 transitions, 4519 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:07,291 INFO L231 Difference]: Finished difference. Result has 186 places, 279 transitions, 3969 flow [2024-06-20 16:21:07,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3969, PETRI_PLACES=186, PETRI_TRANSITIONS=279} [2024-06-20 16:21:07,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-20 16:21:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 279 transitions, 3969 flow [2024-06-20 16:21:07,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:07,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:07,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:21:07,292 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:07,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash 552840893, now seen corresponding path program 7 times [2024-06-20 16:21:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281396841] [2024-06-20 16:21:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:08,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:08,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281396841] [2024-06-20 16:21:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281396841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:08,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:08,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821818018] [2024-06-20 16:21:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:08,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 279 transitions, 3969 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:08,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:08,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:08,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:09,154 INFO L124 PetriNetUnfolderBase]: 3206/4901 cut-off events. [2024-06-20 16:21:09,155 INFO L125 PetriNetUnfolderBase]: For 197156/197158 co-relation queries the response was YES. [2024-06-20 16:21:09,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36383 conditions, 4901 events. 3206/4901 cut-off events. For 197156/197158 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25704 event pairs, 1324 based on Foata normal form. 4/4900 useless extension candidates. Maximal degree in co-relation 36299. Up to 4655 conditions per place. [2024-06-20 16:21:09,197 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 18 changer transitions 0/302 dead transitions. [2024-06-20 16:21:09,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 302 transitions, 4673 flow [2024-06-20 16:21:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:21:09,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:21:09,199 INFO L175 Difference]: Start difference. First operand has 186 places, 279 transitions, 3969 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:21:09,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 302 transitions, 4673 flow [2024-06-20 16:21:09,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 302 transitions, 4564 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:09,681 INFO L231 Difference]: Finished difference. Result has 189 places, 281 transitions, 3947 flow [2024-06-20 16:21:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3947, PETRI_PLACES=189, PETRI_TRANSITIONS=281} [2024-06-20 16:21:09,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-20 16:21:09,681 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 281 transitions, 3947 flow [2024-06-20 16:21:09,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:09,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:09,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:21:09,682 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:09,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1623264667, now seen corresponding path program 8 times [2024-06-20 16:21:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408046334] [2024-06-20 16:21:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:10,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408046334] [2024-06-20 16:21:10,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408046334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:10,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:10,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799071728] [2024-06-20 16:21:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:10,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 281 transitions, 3947 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:11,578 INFO L124 PetriNetUnfolderBase]: 3240/4960 cut-off events. [2024-06-20 16:21:11,578 INFO L125 PetriNetUnfolderBase]: For 201141/201147 co-relation queries the response was YES. [2024-06-20 16:21:11,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36769 conditions, 4960 events. 3240/4960 cut-off events. For 201141/201147 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26159 event pairs, 1084 based on Foata normal form. 12/4967 useless extension candidates. Maximal degree in co-relation 36685. Up to 3883 conditions per place. [2024-06-20 16:21:11,619 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 119 changer transitions 0/312 dead transitions. [2024-06-20 16:21:11,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 312 transitions, 4917 flow [2024-06-20 16:21:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 16:21:11,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-20 16:21:11,620 INFO L175 Difference]: Start difference. First operand has 189 places, 281 transitions, 3947 flow. Second operand 7 states and 137 transitions. [2024-06-20 16:21:11,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 312 transitions, 4917 flow [2024-06-20 16:21:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 312 transitions, 4848 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:12,019 INFO L231 Difference]: Finished difference. Result has 191 places, 287 transitions, 4297 flow [2024-06-20 16:21:12,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4297, PETRI_PLACES=191, PETRI_TRANSITIONS=287} [2024-06-20 16:21:12,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:21:12,020 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 287 transitions, 4297 flow [2024-06-20 16:21:12,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:12,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:12,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:21:12,021 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 543636683, now seen corresponding path program 9 times [2024-06-20 16:21:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:12,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249467439] [2024-06-20 16:21:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:12,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249467439] [2024-06-20 16:21:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249467439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:12,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:12,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204892427] [2024-06-20 16:21:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:13,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:13,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 287 transitions, 4297 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:13,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:13,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:13,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:14,019 INFO L124 PetriNetUnfolderBase]: 3224/4934 cut-off events. [2024-06-20 16:21:14,019 INFO L125 PetriNetUnfolderBase]: For 210655/210659 co-relation queries the response was YES. [2024-06-20 16:21:14,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37328 conditions, 4934 events. 3224/4934 cut-off events. For 210655/210659 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25964 event pairs, 1047 based on Foata normal form. 10/4939 useless extension candidates. Maximal degree in co-relation 37243. Up to 4127 conditions per place. [2024-06-20 16:21:14,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 117 changer transitions 0/313 dead transitions. [2024-06-20 16:21:14,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 313 transitions, 5010 flow [2024-06-20 16:21:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 16:21:14,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 16:21:14,057 INFO L175 Difference]: Start difference. First operand has 191 places, 287 transitions, 4297 flow. Second operand 7 states and 140 transitions. [2024-06-20 16:21:14,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 313 transitions, 5010 flow [2024-06-20 16:21:14,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 313 transitions, 4811 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 16:21:14,614 INFO L231 Difference]: Finished difference. Result has 195 places, 287 transitions, 4361 flow [2024-06-20 16:21:14,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4361, PETRI_PLACES=195, PETRI_TRANSITIONS=287} [2024-06-20 16:21:14,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 16:21:14,614 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 287 transitions, 4361 flow [2024-06-20 16:21:14,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:14,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:14,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:14,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:21:14,618 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)] === [2024-06-20 16:21:14,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1069976581, now seen corresponding path program 3 times [2024-06-20 16:21:14,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378174356] [2024-06-20 16:21:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378174356] [2024-06-20 16:21:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378174356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:15,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931721503] [2024-06-20 16:21:15,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:15,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:15,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:15,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:15,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 287 transitions, 4361 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:15,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:15,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:15,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:16,158 INFO L124 PetriNetUnfolderBase]: 3349/5065 cut-off events. [2024-06-20 16:21:16,158 INFO L125 PetriNetUnfolderBase]: For 216128/216128 co-relation queries the response was YES. [2024-06-20 16:21:16,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38339 conditions, 5065 events. 3349/5065 cut-off events. For 216128/216128 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26154 event pairs, 1437 based on Foata normal form. 1/5065 useless extension candidates. Maximal degree in co-relation 38252. Up to 5005 conditions per place. [2024-06-20 16:21:16,200 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 281 selfloop transitions, 15 changer transitions 0/299 dead transitions. [2024-06-20 16:21:16,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 299 transitions, 5039 flow [2024-06-20 16:21:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 16:21:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 16:21:16,201 INFO L175 Difference]: Start difference. First operand has 195 places, 287 transitions, 4361 flow. Second operand 7 states and 108 transitions. [2024-06-20 16:21:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 299 transitions, 5039 flow [2024-06-20 16:21:16,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 299 transitions, 4774 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:21:16,612 INFO L231 Difference]: Finished difference. Result has 196 places, 290 transitions, 4196 flow [2024-06-20 16:21:16,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4196, PETRI_PLACES=196, PETRI_TRANSITIONS=290} [2024-06-20 16:21:16,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-20 16:21:16,613 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 290 transitions, 4196 flow [2024-06-20 16:21:16,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:16,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:16,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:16,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:21:16,613 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)] === [2024-06-20 16:21:16,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1069560499, now seen corresponding path program 6 times [2024-06-20 16:21:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:16,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646693923] [2024-06-20 16:21:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:17,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646693923] [2024-06-20 16:21:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646693923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:17,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:17,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649980942] [2024-06-20 16:21:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:17,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 290 transitions, 4196 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:18,170 INFO L124 PetriNetUnfolderBase]: 3225/4933 cut-off events. [2024-06-20 16:21:18,170 INFO L125 PetriNetUnfolderBase]: For 220367/220369 co-relation queries the response was YES. [2024-06-20 16:21:18,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37262 conditions, 4933 events. 3225/4933 cut-off events. For 220367/220369 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25944 event pairs, 1365 based on Foata normal form. 4/4932 useless extension candidates. Maximal degree in co-relation 37174. Up to 4736 conditions per place. [2024-06-20 16:21:18,215 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 265 selfloop transitions, 26 changer transitions 0/300 dead transitions. [2024-06-20 16:21:18,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 300 transitions, 4882 flow [2024-06-20 16:21:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:21:18,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:21:18,215 INFO L175 Difference]: Start difference. First operand has 196 places, 290 transitions, 4196 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:21:18,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 300 transitions, 4882 flow [2024-06-20 16:21:18,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 300 transitions, 4796 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:18,642 INFO L231 Difference]: Finished difference. Result has 198 places, 290 transitions, 4170 flow [2024-06-20 16:21:18,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4170, PETRI_PLACES=198, PETRI_TRANSITIONS=290} [2024-06-20 16:21:18,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-20 16:21:18,642 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 290 transitions, 4170 flow [2024-06-20 16:21:18,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:18,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:18,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:21:18,643 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)] === [2024-06-20 16:21:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1069560871, now seen corresponding path program 4 times [2024-06-20 16:21:18,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:18,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328411083] [2024-06-20 16:21:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328411083] [2024-06-20 16:21:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328411083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:19,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492608459] [2024-06-20 16:21:19,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:19,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:19,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 290 transitions, 4170 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:19,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:19,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:19,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:20,254 INFO L124 PetriNetUnfolderBase]: 3342/5056 cut-off events. [2024-06-20 16:21:20,254 INFO L125 PetriNetUnfolderBase]: For 230113/230113 co-relation queries the response was YES. [2024-06-20 16:21:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38011 conditions, 5056 events. 3342/5056 cut-off events. For 230113/230113 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26091 event pairs, 1435 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 37922. Up to 4990 conditions per place. [2024-06-20 16:21:20,297 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 20 changer transitions 0/299 dead transitions. [2024-06-20 16:21:20,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 299 transitions, 4790 flow [2024-06-20 16:21:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:21:20,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 16:21:20,299 INFO L175 Difference]: Start difference. First operand has 198 places, 290 transitions, 4170 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:21:20,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 299 transitions, 4790 flow [2024-06-20 16:21:20,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 299 transitions, 4627 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:21:20,809 INFO L231 Difference]: Finished difference. Result has 199 places, 290 transitions, 4053 flow [2024-06-20 16:21:20,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4007, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4053, PETRI_PLACES=199, PETRI_TRANSITIONS=290} [2024-06-20 16:21:20,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-20 16:21:20,810 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 290 transitions, 4053 flow [2024-06-20 16:21:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:20,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:20,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:20,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:21:20,811 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)] === [2024-06-20 16:21:20,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1682345945, now seen corresponding path program 1 times [2024-06-20 16:21:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:20,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733793320] [2024-06-20 16:21:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733793320] [2024-06-20 16:21:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733793320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:21,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:21,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:21,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834460207] [2024-06-20 16:21:21,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:21,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:21,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:21,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:21,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 290 transitions, 4053 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:21,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:21,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:22,580 INFO L124 PetriNetUnfolderBase]: 3232/4942 cut-off events. [2024-06-20 16:21:22,580 INFO L125 PetriNetUnfolderBase]: For 238927/238927 co-relation queries the response was YES. [2024-06-20 16:21:22,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37421 conditions, 4942 events. 3232/4942 cut-off events. For 238927/238927 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26017 event pairs, 1360 based on Foata normal form. 2/4939 useless extension candidates. Maximal degree in co-relation 37333. Up to 4752 conditions per place. [2024-06-20 16:21:22,615 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 283 selfloop transitions, 17 changer transitions 0/309 dead transitions. [2024-06-20 16:21:22,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 309 transitions, 4749 flow [2024-06-20 16:21:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:21:22,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:21:22,616 INFO L175 Difference]: Start difference. First operand has 199 places, 290 transitions, 4053 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:21:22,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 309 transitions, 4749 flow [2024-06-20 16:21:23,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 309 transitions, 4610 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:23,092 INFO L231 Difference]: Finished difference. Result has 199 places, 293 transitions, 3997 flow [2024-06-20 16:21:23,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3997, PETRI_PLACES=199, PETRI_TRANSITIONS=293} [2024-06-20 16:21:23,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-20 16:21:23,093 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 293 transitions, 3997 flow [2024-06-20 16:21:23,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:21:23,094 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)] === [2024-06-20 16:21:23,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1682225975, now seen corresponding path program 2 times [2024-06-20 16:21:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809434758] [2024-06-20 16:21:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:23,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:23,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809434758] [2024-06-20 16:21:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809434758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600939041] [2024-06-20 16:21:23,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:23,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:23,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:23,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 293 transitions, 3997 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:23,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:23,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:23,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:24,740 INFO L124 PetriNetUnfolderBase]: 3242/4964 cut-off events. [2024-06-20 16:21:24,741 INFO L125 PetriNetUnfolderBase]: For 250260/250260 co-relation queries the response was YES. [2024-06-20 16:21:24,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37777 conditions, 4964 events. 3242/4964 cut-off events. For 250260/250260 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26126 event pairs, 1361 based on Foata normal form. 2/4965 useless extension candidates. Maximal degree in co-relation 37689. Up to 4742 conditions per place. [2024-06-20 16:21:24,780 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 29 changer transitions 0/315 dead transitions. [2024-06-20 16:21:24,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 315 transitions, 4829 flow [2024-06-20 16:21:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:21:24,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:21:24,781 INFO L175 Difference]: Start difference. First operand has 199 places, 293 transitions, 3997 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:21:24,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 315 transitions, 4829 flow [2024-06-20 16:21:25,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 315 transitions, 4772 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:25,246 INFO L231 Difference]: Finished difference. Result has 201 places, 299 transitions, 4094 flow [2024-06-20 16:21:25,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4094, PETRI_PLACES=201, PETRI_TRANSITIONS=299} [2024-06-20 16:21:25,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 16:21:25,246 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 299 transitions, 4094 flow [2024-06-20 16:21:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:25,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:25,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:21:25,247 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)] === [2024-06-20 16:21:25,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -744235687, now seen corresponding path program 1 times [2024-06-20 16:21:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170199138] [2024-06-20 16:21:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170199138] [2024-06-20 16:21:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170199138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:25,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735706577] [2024-06-20 16:21:25,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:25,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:25,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:25,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:25,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 299 transitions, 4094 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:25,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:25,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:25,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:26,961 INFO L124 PetriNetUnfolderBase]: 3367/5091 cut-off events. [2024-06-20 16:21:26,961 INFO L125 PetriNetUnfolderBase]: For 260898/260898 co-relation queries the response was YES. [2024-06-20 16:21:26,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38984 conditions, 5091 events. 3367/5091 cut-off events. For 260898/260898 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26276 event pairs, 1435 based on Foata normal form. 1/5091 useless extension candidates. Maximal degree in co-relation 38895. Up to 5010 conditions per place. [2024-06-20 16:21:27,006 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 291 selfloop transitions, 24 changer transitions 0/318 dead transitions. [2024-06-20 16:21:27,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 318 transitions, 4922 flow [2024-06-20 16:21:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:21:27,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:21:27,007 INFO L175 Difference]: Start difference. First operand has 201 places, 299 transitions, 4094 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:21:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 318 transitions, 4922 flow [2024-06-20 16:21:27,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 318 transitions, 4862 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:21:27,593 INFO L231 Difference]: Finished difference. Result has 205 places, 305 transitions, 4166 flow [2024-06-20 16:21:27,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4166, PETRI_PLACES=205, PETRI_TRANSITIONS=305} [2024-06-20 16:21:27,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-20 16:21:27,594 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 305 transitions, 4166 flow [2024-06-20 16:21:27,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:27,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:27,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:27,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:21:27,594 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)] === [2024-06-20 16:21:27,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1596389503, now seen corresponding path program 2 times [2024-06-20 16:21:27,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:27,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606567015] [2024-06-20 16:21:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:27,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606567015] [2024-06-20 16:21:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606567015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101059457] [2024-06-20 16:21:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:28,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:28,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 305 transitions, 4166 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:28,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:28,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:28,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:29,340 INFO L124 PetriNetUnfolderBase]: 3372/5099 cut-off events. [2024-06-20 16:21:29,341 INFO L125 PetriNetUnfolderBase]: For 272218/272220 co-relation queries the response was YES. [2024-06-20 16:21:29,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39541 conditions, 5099 events. 3372/5099 cut-off events. For 272218/272220 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26324 event pairs, 1437 based on Foata normal form. 3/5101 useless extension candidates. Maximal degree in co-relation 39450. Up to 5016 conditions per place. [2024-06-20 16:21:29,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 28 changer transitions 0/318 dead transitions. [2024-06-20 16:21:29,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 318 transitions, 4950 flow [2024-06-20 16:21:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 16:21:29,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:21:29,381 INFO L175 Difference]: Start difference. First operand has 205 places, 305 transitions, 4166 flow. Second operand 7 states and 112 transitions. [2024-06-20 16:21:29,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 318 transitions, 4950 flow [2024-06-20 16:21:29,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 318 transitions, 4899 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:21:29,842 INFO L231 Difference]: Finished difference. Result has 209 places, 308 transitions, 4217 flow [2024-06-20 16:21:29,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4217, PETRI_PLACES=209, PETRI_TRANSITIONS=308} [2024-06-20 16:21:29,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-20 16:21:29,842 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 308 transitions, 4217 flow [2024-06-20 16:21:29,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:29,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:29,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:29,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:21:29,843 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)] === [2024-06-20 16:21:29,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1505094455, now seen corresponding path program 3 times [2024-06-20 16:21:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:29,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483231986] [2024-06-20 16:21:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:29,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:30,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:30,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483231986] [2024-06-20 16:21:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483231986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:30,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681742200] [2024-06-20 16:21:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:30,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:30,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 308 transitions, 4217 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:30,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:30,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:30,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:31,543 INFO L124 PetriNetUnfolderBase]: 3258/4983 cut-off events. [2024-06-20 16:21:31,543 INFO L125 PetriNetUnfolderBase]: For 283666/283668 co-relation queries the response was YES. [2024-06-20 16:21:31,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39183 conditions, 4983 events. 3258/4983 cut-off events. For 283666/283668 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26159 event pairs, 1376 based on Foata normal form. 2/4984 useless extension candidates. Maximal degree in co-relation 39090. Up to 4759 conditions per place. [2024-06-20 16:21:31,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 278 selfloop transitions, 29 changer transitions 0/319 dead transitions. [2024-06-20 16:21:31,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 319 transitions, 4867 flow [2024-06-20 16:21:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:21:31,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 16:21:31,587 INFO L175 Difference]: Start difference. First operand has 209 places, 308 transitions, 4217 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:21:31,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 319 transitions, 4867 flow [2024-06-20 16:21:32,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 319 transitions, 4775 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:32,165 INFO L231 Difference]: Finished difference. Result has 212 places, 308 transitions, 4189 flow [2024-06-20 16:21:32,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4189, PETRI_PLACES=212, PETRI_TRANSITIONS=308} [2024-06-20 16:21:32,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 16:21:32,166 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 308 transitions, 4189 flow [2024-06-20 16:21:32,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:32,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:32,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:32,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:21:32,166 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)] === [2024-06-20 16:21:32,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1505094269, now seen corresponding path program 3 times [2024-06-20 16:21:32,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:32,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309864126] [2024-06-20 16:21:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:32,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:32,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:32,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309864126] [2024-06-20 16:21:32,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309864126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:32,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003740103] [2024-06-20 16:21:32,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:32,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:32,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:32,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 308 transitions, 4189 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:33,848 INFO L124 PetriNetUnfolderBase]: 3363/5087 cut-off events. [2024-06-20 16:21:33,849 INFO L125 PetriNetUnfolderBase]: For 291423/291425 co-relation queries the response was YES. [2024-06-20 16:21:33,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39853 conditions, 5087 events. 3363/5087 cut-off events. For 291423/291425 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26242 event pairs, 1436 based on Foata normal form. 3/5089 useless extension candidates. Maximal degree in co-relation 39759. Up to 5005 conditions per place. [2024-06-20 16:21:33,896 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 27 changer transitions 0/317 dead transitions. [2024-06-20 16:21:33,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 317 transitions, 4845 flow [2024-06-20 16:21:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:21:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:21:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 16:21:33,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:21:33,897 INFO L175 Difference]: Start difference. First operand has 212 places, 308 transitions, 4189 flow. Second operand 7 states and 112 transitions. [2024-06-20 16:21:33,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 317 transitions, 4845 flow [2024-06-20 16:21:34,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 317 transitions, 4738 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:34,412 INFO L231 Difference]: Finished difference. Result has 212 places, 308 transitions, 4142 flow [2024-06-20 16:21:34,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4082, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4142, PETRI_PLACES=212, PETRI_TRANSITIONS=308} [2024-06-20 16:21:34,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 16:21:34,412 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 308 transitions, 4142 flow [2024-06-20 16:21:34,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:34,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:34,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:34,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:21:34,413 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)] === [2024-06-20 16:21:34,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1153252368, now seen corresponding path program 1 times [2024-06-20 16:21:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341985572] [2024-06-20 16:21:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:35,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:35,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341985572] [2024-06-20 16:21:35,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341985572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:35,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:35,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422965512] [2024-06-20 16:21:35,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:35,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:35,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:35,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 308 transitions, 4142 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:35,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:35,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:35,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:36,222 INFO L124 PetriNetUnfolderBase]: 3292/5027 cut-off events. [2024-06-20 16:21:36,222 INFO L125 PetriNetUnfolderBase]: For 304884/304888 co-relation queries the response was YES. [2024-06-20 16:21:36,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39859 conditions, 5027 events. 3292/5027 cut-off events. For 304884/304888 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26356 event pairs, 956 based on Foata normal form. 6/5032 useless extension candidates. Maximal degree in co-relation 39765. Up to 4457 conditions per place. [2024-06-20 16:21:36,266 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 94 changer transitions 0/356 dead transitions. [2024-06-20 16:21:36,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 356 transitions, 5342 flow [2024-06-20 16:21:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:21:36,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-20 16:21:36,267 INFO L175 Difference]: Start difference. First operand has 212 places, 308 transitions, 4142 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:21:36,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 356 transitions, 5342 flow [2024-06-20 16:21:36,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 356 transitions, 5266 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:36,836 INFO L231 Difference]: Finished difference. Result has 216 places, 328 transitions, 4622 flow [2024-06-20 16:21:36,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=216, PETRI_TRANSITIONS=328} [2024-06-20 16:21:36,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-20 16:21:36,837 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 328 transitions, 4622 flow [2024-06-20 16:21:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:36,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:36,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:36,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:21:36,837 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)] === [2024-06-20 16:21:36,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -373245339, now seen corresponding path program 1 times [2024-06-20 16:21:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:36,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905866103] [2024-06-20 16:21:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905866103] [2024-06-20 16:21:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905866103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036951433] [2024-06-20 16:21:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:37,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:37,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:37,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 328 transitions, 4622 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:37,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:37,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:37,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:38,665 INFO L124 PetriNetUnfolderBase]: 3418/5160 cut-off events. [2024-06-20 16:21:38,665 INFO L125 PetriNetUnfolderBase]: For 321539/321543 co-relation queries the response was YES. [2024-06-20 16:21:38,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42131 conditions, 5160 events. 3418/5160 cut-off events. For 321539/321543 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26628 event pairs, 1108 based on Foata normal form. 6/5165 useless extension candidates. Maximal degree in co-relation 42033. Up to 4742 conditions per place. [2024-06-20 16:21:38,710 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 106 changer transitions 0/366 dead transitions. [2024-06-20 16:21:38,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 366 transitions, 5806 flow [2024-06-20 16:21:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:21:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:21:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:21:38,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:21:38,712 INFO L175 Difference]: Start difference. First operand has 216 places, 328 transitions, 4622 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:21:38,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 366 transitions, 5806 flow [2024-06-20 16:21:39,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 366 transitions, 5719 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 16:21:39,397 INFO L231 Difference]: Finished difference. Result has 224 places, 340 transitions, 5006 flow [2024-06-20 16:21:39,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5006, PETRI_PLACES=224, PETRI_TRANSITIONS=340} [2024-06-20 16:21:39,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-20 16:21:39,398 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 340 transitions, 5006 flow [2024-06-20 16:21:39,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:39,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:39,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:39,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:21:39,398 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)] === [2024-06-20 16:21:39,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash 353701610, now seen corresponding path program 1 times [2024-06-20 16:21:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:39,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925828602] [2024-06-20 16:21:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:40,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:40,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925828602] [2024-06-20 16:21:40,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925828602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:40,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:40,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:40,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738037836] [2024-06-20 16:21:40,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:40,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:40,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:40,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:40,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 340 transitions, 5006 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:40,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:40,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:40,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:41,158 INFO L124 PetriNetUnfolderBase]: 3361/5121 cut-off events. [2024-06-20 16:21:41,159 INFO L125 PetriNetUnfolderBase]: For 344947/344957 co-relation queries the response was YES. [2024-06-20 16:21:41,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43579 conditions, 5121 events. 3361/5121 cut-off events. For 344947/344957 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26882 event pairs, 1064 based on Foata normal form. 12/5132 useless extension candidates. Maximal degree in co-relation 43478. Up to 4670 conditions per place. [2024-06-20 16:21:41,297 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 274 selfloop transitions, 87 changer transitions 0/376 dead transitions. [2024-06-20 16:21:41,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 376 transitions, 6354 flow [2024-06-20 16:21:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:21:41,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:21:41,298 INFO L175 Difference]: Start difference. First operand has 224 places, 340 transitions, 5006 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:21:41,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 376 transitions, 6354 flow [2024-06-20 16:21:42,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 376 transitions, 6234 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:42,019 INFO L231 Difference]: Finished difference. Result has 229 places, 352 transitions, 5348 flow [2024-06-20 16:21:42,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5348, PETRI_PLACES=229, PETRI_TRANSITIONS=352} [2024-06-20 16:21:42,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 16:21:42,020 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 352 transitions, 5348 flow [2024-06-20 16:21:42,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:42,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:42,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:42,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:21:42,020 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:42,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash -637202208, now seen corresponding path program 1 times [2024-06-20 16:21:42,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:42,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993222970] [2024-06-20 16:21:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:42,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993222970] [2024-06-20 16:21:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993222970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:43,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:21:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198502480] [2024-06-20 16:21:43,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:21:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:21:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:21:43,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:43,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 352 transitions, 5348 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:43,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:43,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:43,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:44,715 INFO L124 PetriNetUnfolderBase]: 3423/5222 cut-off events. [2024-06-20 16:21:44,715 INFO L125 PetriNetUnfolderBase]: For 364055/364059 co-relation queries the response was YES. [2024-06-20 16:21:44,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44595 conditions, 5222 events. 3423/5222 cut-off events. For 364055/364059 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 27556 event pairs, 1015 based on Foata normal form. 14/5235 useless extension candidates. Maximal degree in co-relation 44491. Up to 4426 conditions per place. [2024-06-20 16:21:44,759 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 270 selfloop transitions, 119 changer transitions 0/404 dead transitions. [2024-06-20 16:21:44,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 404 transitions, 6423 flow [2024-06-20 16:21:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:21:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:21:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:21:44,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-20 16:21:44,761 INFO L175 Difference]: Start difference. First operand has 229 places, 352 transitions, 5348 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:21:44,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 404 transitions, 6423 flow [2024-06-20 16:21:45,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 404 transitions, 6289 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:45,534 INFO L231 Difference]: Finished difference. Result has 237 places, 363 transitions, 5690 flow [2024-06-20 16:21:45,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5690, PETRI_PLACES=237, PETRI_TRANSITIONS=363} [2024-06-20 16:21:45,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-20 16:21:45,535 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 363 transitions, 5690 flow [2024-06-20 16:21:45,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:45,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:45,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:45,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:21:45,536 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:45,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1256604618, now seen corresponding path program 2 times [2024-06-20 16:21:45,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:45,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11108746] [2024-06-20 16:21:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:45,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:46,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11108746] [2024-06-20 16:21:46,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11108746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:46,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:46,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:21:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940563072] [2024-06-20 16:21:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:21:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:21:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:21:46,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:46,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 363 transitions, 5690 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:46,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:46,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:46,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:48,275 INFO L124 PetriNetUnfolderBase]: 3464/5300 cut-off events. [2024-06-20 16:21:48,275 INFO L125 PetriNetUnfolderBase]: For 383368/383378 co-relation queries the response was YES. [2024-06-20 16:21:48,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46107 conditions, 5300 events. 3464/5300 cut-off events. For 383368/383378 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28241 event pairs, 1008 based on Foata normal form. 20/5319 useless extension candidates. Maximal degree in co-relation 46000. Up to 4497 conditions per place. [2024-06-20 16:21:48,320 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 276 selfloop transitions, 113 changer transitions 0/404 dead transitions. [2024-06-20 16:21:48,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 404 transitions, 6679 flow [2024-06-20 16:21:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:21:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:21:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:21:48,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-20 16:21:48,322 INFO L175 Difference]: Start difference. First operand has 237 places, 363 transitions, 5690 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:21:48,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 404 transitions, 6679 flow [2024-06-20 16:21:49,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 404 transitions, 6540 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:49,121 INFO L231 Difference]: Finished difference. Result has 242 places, 364 transitions, 5822 flow [2024-06-20 16:21:49,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5822, PETRI_PLACES=242, PETRI_TRANSITIONS=364} [2024-06-20 16:21:49,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 16:21:49,122 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 364 transitions, 5822 flow [2024-06-20 16:21:49,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:49,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:49,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:49,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:21:49,122 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:49,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1256835258, now seen corresponding path program 3 times [2024-06-20 16:21:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830540927] [2024-06-20 16:21:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:50,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:50,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830540927] [2024-06-20 16:21:50,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830540927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:50,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:50,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:21:50,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896039542] [2024-06-20 16:21:50,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:21:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:21:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:21:50,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:50,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 364 transitions, 5822 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:50,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:50,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:50,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:51,738 INFO L124 PetriNetUnfolderBase]: 3505/5371 cut-off events. [2024-06-20 16:21:51,739 INFO L125 PetriNetUnfolderBase]: For 400895/400905 co-relation queries the response was YES. [2024-06-20 16:21:51,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46779 conditions, 5371 events. 3505/5371 cut-off events. For 400895/400905 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28753 event pairs, 1009 based on Foata normal form. 20/5390 useless extension candidates. Maximal degree in co-relation 46671. Up to 4465 conditions per place. [2024-06-20 16:21:51,786 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 122 changer transitions 0/405 dead transitions. [2024-06-20 16:21:51,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 405 transitions, 6813 flow [2024-06-20 16:21:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:21:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:21:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:21:51,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-20 16:21:51,787 INFO L175 Difference]: Start difference. First operand has 242 places, 364 transitions, 5822 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:21:51,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 405 transitions, 6813 flow [2024-06-20 16:21:52,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 405 transitions, 6619 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:21:52,604 INFO L231 Difference]: Finished difference. Result has 246 places, 365 transitions, 5919 flow [2024-06-20 16:21:52,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5628, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5919, PETRI_PLACES=246, PETRI_TRANSITIONS=365} [2024-06-20 16:21:52,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 16:21:52,604 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 365 transitions, 5919 flow [2024-06-20 16:21:52,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:52,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:52,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:21:52,605 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)] === [2024-06-20 16:21:52,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1412054948, now seen corresponding path program 2 times [2024-06-20 16:21:52,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:52,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873078258] [2024-06-20 16:21:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873078258] [2024-06-20 16:21:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873078258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:53,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:53,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:21:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068376914] [2024-06-20 16:21:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:53,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:21:53,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:21:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:21:53,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:53,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 365 transitions, 5919 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:53,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:53,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:53,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:54,383 INFO L124 PetriNetUnfolderBase]: 3499/5360 cut-off events. [2024-06-20 16:21:54,384 INFO L125 PetriNetUnfolderBase]: For 404307/404317 co-relation queries the response was YES. [2024-06-20 16:21:54,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46836 conditions, 5360 events. 3499/5360 cut-off events. For 404307/404317 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28658 event pairs, 1108 based on Foata normal form. 12/5371 useless extension candidates. Maximal degree in co-relation 46727. Up to 4908 conditions per place. [2024-06-20 16:21:54,439 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 283 selfloop transitions, 87 changer transitions 0/385 dead transitions. [2024-06-20 16:21:54,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 385 transitions, 6935 flow [2024-06-20 16:21:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:21:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:21:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:21:54,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:21:54,440 INFO L175 Difference]: Start difference. First operand has 246 places, 365 transitions, 5919 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:21:54,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 385 transitions, 6935 flow [2024-06-20 16:21:55,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 385 transitions, 6647 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 16:21:55,345 INFO L231 Difference]: Finished difference. Result has 246 places, 365 transitions, 5816 flow [2024-06-20 16:21:55,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5816, PETRI_PLACES=246, PETRI_TRANSITIONS=365} [2024-06-20 16:21:55,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 16:21:55,346 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 365 transitions, 5816 flow [2024-06-20 16:21:55,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:55,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:55,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:55,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:21:55,346 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)] === [2024-06-20 16:21:55,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:55,347 INFO L85 PathProgramCache]: Analyzing trace with hash 268975534, now seen corresponding path program 2 times [2024-06-20 16:21:55,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:55,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318264693] [2024-06-20 16:21:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:55,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:56,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:56,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318264693] [2024-06-20 16:21:56,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318264693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:56,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:56,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:56,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948093207] [2024-06-20 16:21:56,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:56,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:21:56,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 365 transitions, 5816 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:56,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:56,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:21:56,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:57,704 INFO L124 PetriNetUnfolderBase]: 3572/5464 cut-off events. [2024-06-20 16:21:57,704 INFO L125 PetriNetUnfolderBase]: For 416708/416712 co-relation queries the response was YES. [2024-06-20 16:21:57,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47407 conditions, 5464 events. 3572/5464 cut-off events. For 416708/416712 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29330 event pairs, 1110 based on Foata normal form. 6/5469 useless extension candidates. Maximal degree in co-relation 47297. Up to 4953 conditions per place. [2024-06-20 16:21:57,760 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 291 selfloop transitions, 108 changer transitions 0/414 dead transitions. [2024-06-20 16:21:57,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 414 transitions, 7250 flow [2024-06-20 16:21:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:21:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:21:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:21:57,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-20 16:21:57,761 INFO L175 Difference]: Start difference. First operand has 246 places, 365 transitions, 5816 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:21:57,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 414 transitions, 7250 flow [2024-06-20 16:21:58,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 414 transitions, 7140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:21:58,648 INFO L231 Difference]: Finished difference. Result has 253 places, 384 transitions, 6194 flow [2024-06-20 16:21:58,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5706, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6194, PETRI_PLACES=253, PETRI_TRANSITIONS=384} [2024-06-20 16:21:58,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-20 16:21:58,648 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 384 transitions, 6194 flow [2024-06-20 16:21:58,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:58,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:58,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:58,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:21:58,649 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)] === [2024-06-20 16:21:58,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 904095551, now seen corresponding path program 2 times [2024-06-20 16:21:58,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:58,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572923165] [2024-06-20 16:21:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:58,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:59,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:59,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572923165] [2024-06-20 16:21:59,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572923165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:59,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:59,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:21:59,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850920687] [2024-06-20 16:21:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:21:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:21:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:21:59,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:21:59,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 384 transitions, 6194 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:59,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:59,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:21:59,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:00,649 INFO L124 PetriNetUnfolderBase]: 3721/5633 cut-off events. [2024-06-20 16:22:00,649 INFO L125 PetriNetUnfolderBase]: For 436746/436750 co-relation queries the response was YES. [2024-06-20 16:22:00,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49067 conditions, 5633 events. 3721/5633 cut-off events. For 436746/436750 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29800 event pairs, 1177 based on Foata normal form. 6/5638 useless extension candidates. Maximal degree in co-relation 48955. Up to 5160 conditions per place. [2024-06-20 16:22:00,708 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 308 selfloop transitions, 114 changer transitions 0/425 dead transitions. [2024-06-20 16:22:00,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 425 transitions, 7641 flow [2024-06-20 16:22:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:22:00,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:22:00,709 INFO L175 Difference]: Start difference. First operand has 253 places, 384 transitions, 6194 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:22:00,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 425 transitions, 7641 flow [2024-06-20 16:22:01,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 425 transitions, 7481 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:01,883 INFO L231 Difference]: Finished difference. Result has 257 places, 400 transitions, 6524 flow [2024-06-20 16:22:01,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6524, PETRI_PLACES=257, PETRI_TRANSITIONS=400} [2024-06-20 16:22:01,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-20 16:22:01,884 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 400 transitions, 6524 flow [2024-06-20 16:22:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:01,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:01,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:01,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:22:01,884 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)] === [2024-06-20 16:22:01,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2065510205, now seen corresponding path program 3 times [2024-06-20 16:22:01,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:01,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758858265] [2024-06-20 16:22:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:02,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758858265] [2024-06-20 16:22:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758858265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:02,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:02,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746409377] [2024-06-20 16:22:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:02,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:02,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:02,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:02,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 400 transitions, 6524 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:02,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:02,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:02,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:04,011 INFO L124 PetriNetUnfolderBase]: 3733/5652 cut-off events. [2024-06-20 16:22:04,011 INFO L125 PetriNetUnfolderBase]: For 452265/452279 co-relation queries the response was YES. [2024-06-20 16:22:04,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49892 conditions, 5652 events. 3733/5652 cut-off events. For 452265/452279 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29932 event pairs, 1162 based on Foata normal form. 16/5667 useless extension candidates. Maximal degree in co-relation 49777. Up to 5173 conditions per place. [2024-06-20 16:22:04,063 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 310 selfloop transitions, 113 changer transitions 0/426 dead transitions. [2024-06-20 16:22:04,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 426 transitions, 7836 flow [2024-06-20 16:22:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:22:04,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:22:04,065 INFO L175 Difference]: Start difference. First operand has 257 places, 400 transitions, 6524 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:22:04,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 426 transitions, 7836 flow [2024-06-20 16:22:05,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 426 transitions, 7684 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:22:05,064 INFO L231 Difference]: Finished difference. Result has 262 places, 404 transitions, 6674 flow [2024-06-20 16:22:05,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6674, PETRI_PLACES=262, PETRI_TRANSITIONS=404} [2024-06-20 16:22:05,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 16:22:05,065 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 404 transitions, 6674 flow [2024-06-20 16:22:05,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:05,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:05,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:05,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:22:05,065 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)] === [2024-06-20 16:22:05,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash 913349981, now seen corresponding path program 4 times [2024-06-20 16:22:05,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:05,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245961268] [2024-06-20 16:22:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:05,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:05,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:05,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245961268] [2024-06-20 16:22:05,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245961268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:05,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:05,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810552425] [2024-06-20 16:22:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:05,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 404 transitions, 6674 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:05,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:07,117 INFO L124 PetriNetUnfolderBase]: 3729/5647 cut-off events. [2024-06-20 16:22:07,117 INFO L125 PetriNetUnfolderBase]: For 465830/465844 co-relation queries the response was YES. [2024-06-20 16:22:07,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50065 conditions, 5647 events. 3729/5647 cut-off events. For 465830/465844 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29923 event pairs, 1170 based on Foata normal form. 16/5662 useless extension candidates. Maximal degree in co-relation 49949. Up to 5171 conditions per place. [2024-06-20 16:22:07,180 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 310 selfloop transitions, 112 changer transitions 0/425 dead transitions. [2024-06-20 16:22:07,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 425 transitions, 7812 flow [2024-06-20 16:22:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:22:07,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:22:07,181 INFO L175 Difference]: Start difference. First operand has 262 places, 404 transitions, 6674 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:22:07,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 425 transitions, 7812 flow [2024-06-20 16:22:08,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 425 transitions, 7539 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:08,322 INFO L231 Difference]: Finished difference. Result has 265 places, 404 transitions, 6632 flow [2024-06-20 16:22:08,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6401, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6632, PETRI_PLACES=265, PETRI_TRANSITIONS=404} [2024-06-20 16:22:08,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-20 16:22:08,323 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 404 transitions, 6632 flow [2024-06-20 16:22:08,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:08,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:08,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:08,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:22:08,323 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)] === [2024-06-20 16:22:08,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1412050980, now seen corresponding path program 3 times [2024-06-20 16:22:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:08,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976677109] [2024-06-20 16:22:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:09,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976677109] [2024-06-20 16:22:09,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976677109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:09,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:09,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:09,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396262045] [2024-06-20 16:22:09,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:09,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:09,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:09,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:09,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 404 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:09,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:09,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:09,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:10,737 INFO L124 PetriNetUnfolderBase]: 3628/5545 cut-off events. [2024-06-20 16:22:10,737 INFO L125 PetriNetUnfolderBase]: For 478746/478760 co-relation queries the response was YES. [2024-06-20 16:22:10,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49635 conditions, 5545 events. 3628/5545 cut-off events. For 478746/478760 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29758 event pairs, 1110 based on Foata normal form. 16/5560 useless extension candidates. Maximal degree in co-relation 49518. Up to 5060 conditions per place. [2024-06-20 16:22:10,802 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 316 selfloop transitions, 90 changer transitions 0/426 dead transitions. [2024-06-20 16:22:10,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 426 transitions, 7750 flow [2024-06-20 16:22:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:22:10,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:22:10,803 INFO L175 Difference]: Start difference. First operand has 265 places, 404 transitions, 6632 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:22:10,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 426 transitions, 7750 flow [2024-06-20 16:22:12,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 426 transitions, 7511 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:12,009 INFO L231 Difference]: Finished difference. Result has 267 places, 405 transitions, 6590 flow [2024-06-20 16:22:12,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6590, PETRI_PLACES=267, PETRI_TRANSITIONS=405} [2024-06-20 16:22:12,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-20 16:22:12,009 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 405 transitions, 6590 flow [2024-06-20 16:22:12,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:12,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:12,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:12,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:22:12,010 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)] === [2024-06-20 16:22:12,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1412062884, now seen corresponding path program 1 times [2024-06-20 16:22:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:12,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986760956] [2024-06-20 16:22:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:12,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:12,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:12,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986760956] [2024-06-20 16:22:12,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986760956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:12,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:12,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:12,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115137975] [2024-06-20 16:22:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:12,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:12,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:12,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:12,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:12,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 405 transitions, 6590 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:12,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:12,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:12,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:14,120 INFO L124 PetriNetUnfolderBase]: 3740/5660 cut-off events. [2024-06-20 16:22:14,120 INFO L125 PetriNetUnfolderBase]: For 492391/492393 co-relation queries the response was YES. [2024-06-20 16:22:14,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50446 conditions, 5660 events. 3740/5660 cut-off events. For 492391/492393 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29903 event pairs, 1246 based on Foata normal form. 5/5664 useless extension candidates. Maximal degree in co-relation 50328. Up to 5539 conditions per place. [2024-06-20 16:22:14,182 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 392 selfloop transitions, 41 changer transitions 0/436 dead transitions. [2024-06-20 16:22:14,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 436 transitions, 7762 flow [2024-06-20 16:22:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:22:14,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 16:22:14,183 INFO L175 Difference]: Start difference. First operand has 267 places, 405 transitions, 6590 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:22:14,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 436 transitions, 7762 flow [2024-06-20 16:22:15,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 436 transitions, 7614 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:15,419 INFO L231 Difference]: Finished difference. Result has 273 places, 414 transitions, 6693 flow [2024-06-20 16:22:15,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6442, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6693, PETRI_PLACES=273, PETRI_TRANSITIONS=414} [2024-06-20 16:22:15,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-20 16:22:15,420 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 414 transitions, 6693 flow [2024-06-20 16:22:15,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:15,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:15,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:22:15,421 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)] === [2024-06-20 16:22:15,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1820755602, now seen corresponding path program 4 times [2024-06-20 16:22:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147450844] [2024-06-20 16:22:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:16,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147450844] [2024-06-20 16:22:16,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147450844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:16,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:16,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913051114] [2024-06-20 16:22:16,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:16,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:16,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 414 transitions, 6693 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:16,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:16,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:16,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:17,716 INFO L124 PetriNetUnfolderBase]: 3654/5579 cut-off events. [2024-06-20 16:22:17,717 INFO L125 PetriNetUnfolderBase]: For 508925/508930 co-relation queries the response was YES. [2024-06-20 16:22:17,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50825 conditions, 5579 events. 3654/5579 cut-off events. For 508925/508930 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29966 event pairs, 1095 based on Foata normal form. 6/5582 useless extension candidates. Maximal degree in co-relation 50704. Up to 4973 conditions per place. [2024-06-20 16:22:17,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 138 changer transitions 0/447 dead transitions. [2024-06-20 16:22:17,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 447 transitions, 7963 flow [2024-06-20 16:22:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:22:17,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:22:17,781 INFO L175 Difference]: Start difference. First operand has 273 places, 414 transitions, 6693 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:22:17,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 447 transitions, 7963 flow [2024-06-20 16:22:19,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 447 transitions, 7892 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:19,176 INFO L231 Difference]: Finished difference. Result has 278 places, 419 transitions, 7028 flow [2024-06-20 16:22:19,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=278, PETRI_TRANSITIONS=419} [2024-06-20 16:22:19,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 16:22:19,177 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 419 transitions, 7028 flow [2024-06-20 16:22:19,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:19,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:19,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:19,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:22:19,177 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)] === [2024-06-20 16:22:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1820486491, now seen corresponding path program 5 times [2024-06-20 16:22:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193678448] [2024-06-20 16:22:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:20,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:20,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193678448] [2024-06-20 16:22:20,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193678448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:20,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:20,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:20,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537703885] [2024-06-20 16:22:20,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:20,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:20,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 419 transitions, 7028 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:20,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:20,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:21,309 INFO L124 PetriNetUnfolderBase]: 3760/5689 cut-off events. [2024-06-20 16:22:21,310 INFO L125 PetriNetUnfolderBase]: For 522426/522430 co-relation queries the response was YES. [2024-06-20 16:22:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52142 conditions, 5689 events. 3760/5689 cut-off events. For 522426/522430 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30142 event pairs, 1159 based on Foata normal form. 6/5694 useless extension candidates. Maximal degree in co-relation 52017. Up to 5211 conditions per place. [2024-06-20 16:22:21,370 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 302 selfloop transitions, 140 changer transitions 0/445 dead transitions. [2024-06-20 16:22:21,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 445 transitions, 8296 flow [2024-06-20 16:22:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:22:21,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:22:21,371 INFO L175 Difference]: Start difference. First operand has 278 places, 419 transitions, 7028 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:22:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 445 transitions, 8296 flow [2024-06-20 16:22:22,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 445 transitions, 8123 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:22:22,425 INFO L231 Difference]: Finished difference. Result has 282 places, 423 transitions, 7223 flow [2024-06-20 16:22:22,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6859, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7223, PETRI_PLACES=282, PETRI_TRANSITIONS=423} [2024-06-20 16:22:22,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-20 16:22:22,426 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 423 transitions, 7223 flow [2024-06-20 16:22:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:22,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:22,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:22:22,427 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)] === [2024-06-20 16:22:22,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1816942354, now seen corresponding path program 3 times [2024-06-20 16:22:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988883704] [2024-06-20 16:22:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:23,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988883704] [2024-06-20 16:22:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988883704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:23,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:23,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059034611] [2024-06-20 16:22:23,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:23,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:23,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:23,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 423 transitions, 7223 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:23,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:23,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:23,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:24,347 INFO L124 PetriNetUnfolderBase]: 3690/5630 cut-off events. [2024-06-20 16:22:24,347 INFO L125 PetriNetUnfolderBase]: For 536008/536026 co-relation queries the response was YES. [2024-06-20 16:22:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52317 conditions, 5630 events. 3690/5630 cut-off events. For 536008/536026 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30225 event pairs, 1111 based on Foata normal form. 22/5651 useless extension candidates. Maximal degree in co-relation 52191. Up to 5134 conditions per place. [2024-06-20 16:22:24,414 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 106 changer transitions 0/456 dead transitions. [2024-06-20 16:22:24,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 456 transitions, 8762 flow [2024-06-20 16:22:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:22:24,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:22:24,424 INFO L175 Difference]: Start difference. First operand has 282 places, 423 transitions, 7223 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:22:24,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 456 transitions, 8762 flow [2024-06-20 16:22:25,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 456 transitions, 8450 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:25,792 INFO L231 Difference]: Finished difference. Result has 283 places, 436 transitions, 7523 flow [2024-06-20 16:22:25,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6936, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7523, PETRI_PLACES=283, PETRI_TRANSITIONS=436} [2024-06-20 16:22:25,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 16:22:25,792 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 436 transitions, 7523 flow [2024-06-20 16:22:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:25,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:25,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:25,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:22:25,793 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)] === [2024-06-20 16:22:25,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1811228434, now seen corresponding path program 4 times [2024-06-20 16:22:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:25,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090680786] [2024-06-20 16:22:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:25,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:26,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090680786] [2024-06-20 16:22:26,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090680786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:26,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:26,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736763066] [2024-06-20 16:22:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:26,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:26,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:26,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 436 transitions, 7523 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:26,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:26,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:27,703 INFO L124 PetriNetUnfolderBase]: 3684/5624 cut-off events. [2024-06-20 16:22:27,704 INFO L125 PetriNetUnfolderBase]: For 512785/512803 co-relation queries the response was YES. [2024-06-20 16:22:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51873 conditions, 5624 events. 3684/5624 cut-off events. For 512785/512803 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30227 event pairs, 1109 based on Foata normal form. 20/5643 useless extension candidates. Maximal degree in co-relation 51746. Up to 5129 conditions per place. [2024-06-20 16:22:27,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 99 changer transitions 0/452 dead transitions. [2024-06-20 16:22:27,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 452 transitions, 8677 flow [2024-06-20 16:22:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:22:27,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 16:22:27,769 INFO L175 Difference]: Start difference. First operand has 283 places, 436 transitions, 7523 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:22:27,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 452 transitions, 8677 flow [2024-06-20 16:22:29,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 452 transitions, 8532 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:22:29,177 INFO L231 Difference]: Finished difference. Result has 286 places, 436 transitions, 7598 flow [2024-06-20 16:22:29,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7382, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7598, PETRI_PLACES=286, PETRI_TRANSITIONS=436} [2024-06-20 16:22:29,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-20 16:22:29,178 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 436 transitions, 7598 flow [2024-06-20 16:22:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:29,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:29,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:29,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:22:29,178 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:22:29,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash 430462772, now seen corresponding path program 4 times [2024-06-20 16:22:29,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:29,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381088055] [2024-06-20 16:22:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:29,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:30,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:30,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381088055] [2024-06-20 16:22:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381088055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:30,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:30,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:22:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955616438] [2024-06-20 16:22:30,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:30,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:22:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:30,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:22:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:22:30,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:30,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 436 transitions, 7598 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:30,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:30,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:30,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:31,921 INFO L124 PetriNetUnfolderBase]: 3725/5698 cut-off events. [2024-06-20 16:22:31,921 INFO L125 PetriNetUnfolderBase]: For 525978/525996 co-relation queries the response was YES. [2024-06-20 16:22:31,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52342 conditions, 5698 events. 3725/5698 cut-off events. For 525978/525996 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30754 event pairs, 1036 based on Foata normal form. 28/5725 useless extension candidates. Maximal degree in co-relation 52215. Up to 4772 conditions per place. [2024-06-20 16:22:31,989 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 116 changer transitions 0/474 dead transitions. [2024-06-20 16:22:31,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 474 transitions, 8735 flow [2024-06-20 16:22:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:22:31,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 16:22:31,991 INFO L175 Difference]: Start difference. First operand has 286 places, 436 transitions, 7598 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:22:31,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 474 transitions, 8735 flow [2024-06-20 16:22:33,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 474 transitions, 8582 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:33,512 INFO L231 Difference]: Finished difference. Result has 290 places, 437 transitions, 7728 flow [2024-06-20 16:22:33,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7445, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7728, PETRI_PLACES=290, PETRI_TRANSITIONS=437} [2024-06-20 16:22:33,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 16:22:33,513 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 437 transitions, 7728 flow [2024-06-20 16:22:33,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:33,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:33,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:22:33,513 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:22:33,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash 430693412, now seen corresponding path program 5 times [2024-06-20 16:22:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:33,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5008123] [2024-06-20 16:22:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:34,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5008123] [2024-06-20 16:22:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5008123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:34,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:34,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:22:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538656607] [2024-06-20 16:22:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:22:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:22:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:22:34,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:34,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 437 transitions, 7728 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:34,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:34,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:34,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:36,293 INFO L124 PetriNetUnfolderBase]: 3766/5769 cut-off events. [2024-06-20 16:22:36,293 INFO L125 PetriNetUnfolderBase]: For 531880/531898 co-relation queries the response was YES. [2024-06-20 16:22:36,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53132 conditions, 5769 events. 3766/5769 cut-off events. For 531880/531898 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31336 event pairs, 1037 based on Foata normal form. 28/5796 useless extension candidates. Maximal degree in co-relation 53005. Up to 4623 conditions per place. [2024-06-20 16:22:36,361 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 130 changer transitions 0/474 dead transitions. [2024-06-20 16:22:36,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 474 transitions, 8849 flow [2024-06-20 16:22:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:22:36,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 16:22:36,362 INFO L175 Difference]: Start difference. First operand has 290 places, 437 transitions, 7728 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:22:36,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 474 transitions, 8849 flow [2024-06-20 16:22:37,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 474 transitions, 8581 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:37,969 INFO L231 Difference]: Finished difference. Result has 292 places, 438 transitions, 7773 flow [2024-06-20 16:22:37,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7462, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7773, PETRI_PLACES=292, PETRI_TRANSITIONS=438} [2024-06-20 16:22:37,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-20 16:22:37,969 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 438 transitions, 7773 flow [2024-06-20 16:22:37,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:37,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:37,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:22:37,970 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:22:37,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash 257972882, now seen corresponding path program 6 times [2024-06-20 16:22:37,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:37,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710114958] [2024-06-20 16:22:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:39,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:39,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710114958] [2024-06-20 16:22:39,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710114958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:39,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:39,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:22:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038106288] [2024-06-20 16:22:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:39,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:22:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:22:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:22:39,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:39,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 438 transitions, 7773 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:39,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:39,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:39,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:40,645 INFO L124 PetriNetUnfolderBase]: 3807/5840 cut-off events. [2024-06-20 16:22:40,645 INFO L125 PetriNetUnfolderBase]: For 529038/529042 co-relation queries the response was YES. [2024-06-20 16:22:40,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53537 conditions, 5840 events. 3807/5840 cut-off events. For 529038/529042 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31883 event pairs, 1067 based on Foata normal form. 14/5853 useless extension candidates. Maximal degree in co-relation 53409. Up to 4901 conditions per place. [2024-06-20 16:22:40,707 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 330 selfloop transitions, 128 changer transitions 0/479 dead transitions. [2024-06-20 16:22:40,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 479 transitions, 8943 flow [2024-06-20 16:22:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:22:40,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 16:22:40,708 INFO L175 Difference]: Start difference. First operand has 292 places, 438 transitions, 7773 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:22:40,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 479 transitions, 8943 flow [2024-06-20 16:22:42,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 479 transitions, 8647 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:42,429 INFO L231 Difference]: Finished difference. Result has 294 places, 439 transitions, 7787 flow [2024-06-20 16:22:42,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7787, PETRI_PLACES=294, PETRI_TRANSITIONS=439} [2024-06-20 16:22:42,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 16:22:42,429 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 439 transitions, 7787 flow [2024-06-20 16:22:42,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:42,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:42,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:22:42,430 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)] === [2024-06-20 16:22:42,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 711013969, now seen corresponding path program 6 times [2024-06-20 16:22:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939769546] [2024-06-20 16:22:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:43,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939769546] [2024-06-20 16:22:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939769546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:43,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601565233] [2024-06-20 16:22:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:43,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:43,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 439 transitions, 7787 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:43,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:43,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:43,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:44,528 INFO L124 PetriNetUnfolderBase]: 3949/5996 cut-off events. [2024-06-20 16:22:44,529 INFO L125 PetriNetUnfolderBase]: For 523499/523517 co-relation queries the response was YES. [2024-06-20 16:22:44,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54452 conditions, 5996 events. 3949/5996 cut-off events. For 523499/523517 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32284 event pairs, 1214 based on Foata normal form. 20/6015 useless extension candidates. Maximal degree in co-relation 54323. Up to 5476 conditions per place. [2024-06-20 16:22:44,599 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 327 selfloop transitions, 139 changer transitions 0/469 dead transitions. [2024-06-20 16:22:44,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 469 transitions, 9333 flow [2024-06-20 16:22:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:22:44,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:22:44,600 INFO L175 Difference]: Start difference. First operand has 294 places, 439 transitions, 7787 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:22:44,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 469 transitions, 9333 flow [2024-06-20 16:22:45,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 469 transitions, 9038 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:45,963 INFO L231 Difference]: Finished difference. Result has 296 places, 450 transitions, 8015 flow [2024-06-20 16:22:45,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7498, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8015, PETRI_PLACES=296, PETRI_TRANSITIONS=450} [2024-06-20 16:22:45,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 16:22:45,963 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 450 transitions, 8015 flow [2024-06-20 16:22:45,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:45,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:45,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:45,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:22:45,964 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)] === [2024-06-20 16:22:45,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -922636140, now seen corresponding path program 2 times [2024-06-20 16:22:45,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:45,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072586858] [2024-06-20 16:22:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:45,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:46,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072586858] [2024-06-20 16:22:46,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072586858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:46,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:46,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181390905] [2024-06-20 16:22:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:46,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:46,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 450 transitions, 8015 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:46,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:46,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:46,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:48,177 INFO L124 PetriNetUnfolderBase]: 3980/6036 cut-off events. [2024-06-20 16:22:48,177 INFO L125 PetriNetUnfolderBase]: For 526296/526298 co-relation queries the response was YES. [2024-06-20 16:22:48,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54787 conditions, 6036 events. 3980/6036 cut-off events. For 526296/526298 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32490 event pairs, 1296 based on Foata normal form. 5/6040 useless extension candidates. Maximal degree in co-relation 54656. Up to 5898 conditions per place. [2024-06-20 16:22:48,243 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 426 selfloop transitions, 49 changer transitions 0/478 dead transitions. [2024-06-20 16:22:48,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 478 transitions, 9332 flow [2024-06-20 16:22:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:22:48,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:22:48,244 INFO L175 Difference]: Start difference. First operand has 296 places, 450 transitions, 8015 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:22:48,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 478 transitions, 9332 flow [2024-06-20 16:22:50,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 478 transitions, 9097 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:50,023 INFO L231 Difference]: Finished difference. Result has 299 places, 458 transitions, 8074 flow [2024-06-20 16:22:50,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7782, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8074, PETRI_PLACES=299, PETRI_TRANSITIONS=458} [2024-06-20 16:22:50,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:22:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 458 transitions, 8074 flow [2024-06-20 16:22:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:50,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:50,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:50,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:22:50,024 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)] === [2024-06-20 16:22:50,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -922647703, now seen corresponding path program 7 times [2024-06-20 16:22:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:50,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831728545] [2024-06-20 16:22:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:50,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:50,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:50,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831728545] [2024-06-20 16:22:50,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831728545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:50,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:50,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:50,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130109383] [2024-06-20 16:22:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:50,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:50,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:22:50,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 458 transitions, 8074 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:50,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:50,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:22:50,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:52,305 INFO L124 PetriNetUnfolderBase]: 3976/6034 cut-off events. [2024-06-20 16:22:52,305 INFO L125 PetriNetUnfolderBase]: For 524073/524091 co-relation queries the response was YES. [2024-06-20 16:22:52,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54585 conditions, 6034 events. 3976/6034 cut-off events. For 524073/524091 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32525 event pairs, 1217 based on Foata normal form. 20/6053 useless extension candidates. Maximal degree in co-relation 54454. Up to 5517 conditions per place. [2024-06-20 16:22:52,363 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 139 changer transitions 0/476 dead transitions. [2024-06-20 16:22:52,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 476 transitions, 9344 flow [2024-06-20 16:22:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:22:52,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:22:52,364 INFO L175 Difference]: Start difference. First operand has 299 places, 458 transitions, 8074 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:22:52,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 476 transitions, 9344 flow [2024-06-20 16:22:53,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 476 transitions, 9155 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:53,653 INFO L231 Difference]: Finished difference. Result has 302 places, 459 transitions, 8207 flow [2024-06-20 16:22:53,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8207, PETRI_PLACES=302, PETRI_TRANSITIONS=459} [2024-06-20 16:22:53,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 16:22:53,653 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 459 transitions, 8207 flow [2024-06-20 16:22:53,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:53,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:53,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:53,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:22:53,654 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)] === [2024-06-20 16:22:53,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash -482693654, now seen corresponding path program 5 times [2024-06-20 16:22:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:53,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306494017] [2024-06-20 16:22:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306494017] [2024-06-20 16:22:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306494017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:54,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:54,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661735192] [2024-06-20 16:22:54,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:54,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:54,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 459 transitions, 8207 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:56,008 INFO L124 PetriNetUnfolderBase]: 3889/5952 cut-off events. [2024-06-20 16:22:56,008 INFO L125 PetriNetUnfolderBase]: For 539334/539352 co-relation queries the response was YES. [2024-06-20 16:22:56,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54615 conditions, 5952 events. 3889/5952 cut-off events. For 539334/539352 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32529 event pairs, 1158 based on Foata normal form. 20/5971 useless extension candidates. Maximal degree in co-relation 54482. Up to 5427 conditions per place. [2024-06-20 16:22:56,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 108 changer transitions 0/480 dead transitions. [2024-06-20 16:22:56,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 480 transitions, 9478 flow [2024-06-20 16:22:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:22:56,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:22:56,084 INFO L175 Difference]: Start difference. First operand has 302 places, 459 transitions, 8207 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:22:56,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 480 transitions, 9478 flow [2024-06-20 16:22:57,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 480 transitions, 9281 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:57,613 INFO L231 Difference]: Finished difference. Result has 305 places, 463 transitions, 8311 flow [2024-06-20 16:22:57,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8014, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8311, PETRI_PLACES=305, PETRI_TRANSITIONS=463} [2024-06-20 16:22:57,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 16:22:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 463 transitions, 8311 flow [2024-06-20 16:22:57,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:57,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:57,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:57,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:22:57,614 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)] === [2024-06-20 16:22:57,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 840336902, now seen corresponding path program 5 times [2024-06-20 16:22:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383976299] [2024-06-20 16:22:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:57,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:58,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:58,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383976299] [2024-06-20 16:22:58,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383976299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:58,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:58,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901670312] [2024-06-20 16:22:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:58,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:58,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 463 transitions, 8311 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:58,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:58,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:58,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:59,617 INFO L124 PetriNetUnfolderBase]: 3871/5932 cut-off events. [2024-06-20 16:22:59,618 INFO L125 PetriNetUnfolderBase]: For 540771/540771 co-relation queries the response was YES. [2024-06-20 16:22:59,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54213 conditions, 5932 events. 3871/5932 cut-off events. For 540771/540771 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 32452 event pairs, 1481 based on Foata normal form. 2/5933 useless extension candidates. Maximal degree in co-relation 54080. Up to 5666 conditions per place. [2024-06-20 16:22:59,692 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 424 selfloop transitions, 31 changer transitions 0/479 dead transitions. [2024-06-20 16:22:59,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 479 transitions, 9422 flow [2024-06-20 16:22:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:22:59,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:22:59,693 INFO L175 Difference]: Start difference. First operand has 305 places, 463 transitions, 8311 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:22:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 479 transitions, 9422 flow [2024-06-20 16:23:01,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 479 transitions, 9200 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:01,287 INFO L231 Difference]: Finished difference. Result has 307 places, 463 transitions, 8161 flow [2024-06-20 16:23:01,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8089, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8161, PETRI_PLACES=307, PETRI_TRANSITIONS=463} [2024-06-20 16:23:01,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-20 16:23:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 463 transitions, 8161 flow [2024-06-20 16:23:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:01,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:23:01,288 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)] === [2024-06-20 16:23:01,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1596482600, now seen corresponding path program 6 times [2024-06-20 16:23:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20312730] [2024-06-20 16:23:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20312730] [2024-06-20 16:23:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20312730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:01,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764839158] [2024-06-20 16:23:01,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:01,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:01,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:01,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 463 transitions, 8161 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:01,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:01,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:01,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:03,242 INFO L124 PetriNetUnfolderBase]: 3876/5938 cut-off events. [2024-06-20 16:23:03,242 INFO L125 PetriNetUnfolderBase]: For 553558/553558 co-relation queries the response was YES. [2024-06-20 16:23:03,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54230 conditions, 5938 events. 3876/5938 cut-off events. For 553558/553558 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32467 event pairs, 1485 based on Foata normal form. 1/5938 useless extension candidates. Maximal degree in co-relation 54096. Up to 5693 conditions per place. [2024-06-20 16:23:03,315 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 434 selfloop transitions, 20 changer transitions 0/478 dead transitions. [2024-06-20 16:23:03,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 478 transitions, 9202 flow [2024-06-20 16:23:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:23:03,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:23:03,316 INFO L175 Difference]: Start difference. First operand has 307 places, 463 transitions, 8161 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:23:03,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 478 transitions, 9202 flow [2024-06-20 16:23:04,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 478 transitions, 8763 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 16:23:04,636 INFO L231 Difference]: Finished difference. Result has 304 places, 466 transitions, 7857 flow [2024-06-20 16:23:04,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7857, PETRI_PLACES=304, PETRI_TRANSITIONS=466} [2024-06-20 16:23:04,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 16:23:04,637 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 466 transitions, 7857 flow [2024-06-20 16:23:04,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:04,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:04,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:04,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:23:04,637 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)] === [2024-06-20 16:23:04,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2058897392, now seen corresponding path program 7 times [2024-06-20 16:23:04,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:04,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464680737] [2024-06-20 16:23:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:05,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464680737] [2024-06-20 16:23:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464680737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:05,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:05,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503144986] [2024-06-20 16:23:05,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:05,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:05,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 466 transitions, 7857 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:05,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:05,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:05,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:06,648 INFO L124 PetriNetUnfolderBase]: 3873/5935 cut-off events. [2024-06-20 16:23:06,648 INFO L125 PetriNetUnfolderBase]: For 561392/561394 co-relation queries the response was YES. [2024-06-20 16:23:06,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54019 conditions, 5935 events. 3873/5935 cut-off events. For 561392/561394 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32476 event pairs, 1488 based on Foata normal form. 3/5937 useless extension candidates. Maximal degree in co-relation 53885. Up to 5689 conditions per place. [2024-06-20 16:23:06,722 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 431 selfloop transitions, 20 changer transitions 0/475 dead transitions. [2024-06-20 16:23:06,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 475 transitions, 8791 flow [2024-06-20 16:23:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:23:06,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:23:06,723 INFO L175 Difference]: Start difference. First operand has 304 places, 466 transitions, 7857 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:23:06,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 475 transitions, 8791 flow [2024-06-20 16:23:08,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 475 transitions, 8711 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:08,290 INFO L231 Difference]: Finished difference. Result has 305 places, 466 transitions, 7823 flow [2024-06-20 16:23:08,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7777, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7823, PETRI_PLACES=305, PETRI_TRANSITIONS=466} [2024-06-20 16:23:08,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 16:23:08,290 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 466 transitions, 7823 flow [2024-06-20 16:23:08,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:08,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:23:08,291 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)] === [2024-06-20 16:23:08,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash -693634518, now seen corresponding path program 8 times [2024-06-20 16:23:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466500729] [2024-06-20 16:23:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:08,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:08,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466500729] [2024-06-20 16:23:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466500729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:08,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331423668] [2024-06-20 16:23:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:09,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:09,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 466 transitions, 7823 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:09,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:09,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:09,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:10,353 INFO L124 PetriNetUnfolderBase]: 3865/5924 cut-off events. [2024-06-20 16:23:10,353 INFO L125 PetriNetUnfolderBase]: For 575025/575027 co-relation queries the response was YES. [2024-06-20 16:23:10,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54022 conditions, 5924 events. 3865/5924 cut-off events. For 575025/575027 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32446 event pairs, 1488 based on Foata normal form. 4/5927 useless extension candidates. Maximal degree in co-relation 53887. Up to 5656 conditions per place. [2024-06-20 16:23:10,419 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 30 changer transitions 0/475 dead transitions. [2024-06-20 16:23:10,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 475 transitions, 8757 flow [2024-06-20 16:23:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:23:10,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:23:10,420 INFO L175 Difference]: Start difference. First operand has 305 places, 466 transitions, 7823 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:23:10,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 475 transitions, 8757 flow [2024-06-20 16:23:11,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 475 transitions, 8701 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:11,758 INFO L231 Difference]: Finished difference. Result has 307 places, 466 transitions, 7835 flow [2024-06-20 16:23:11,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7767, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7835, PETRI_PLACES=307, PETRI_TRANSITIONS=466} [2024-06-20 16:23:11,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-20 16:23:11,758 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 466 transitions, 7835 flow [2024-06-20 16:23:11,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:11,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:11,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:11,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:23:11,759 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:11,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:11,759 INFO L85 PathProgramCache]: Analyzing trace with hash 311287984, now seen corresponding path program 7 times [2024-06-20 16:23:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:11,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656183301] [2024-06-20 16:23:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:11,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:12,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:12,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656183301] [2024-06-20 16:23:12,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656183301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:12,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:23:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995129079] [2024-06-20 16:23:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:12,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:23:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:23:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:23:13,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:13,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 466 transitions, 7835 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:13,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:13,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:13,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:14,618 INFO L124 PetriNetUnfolderBase]: 3947/6063 cut-off events. [2024-06-20 16:23:14,618 INFO L125 PetriNetUnfolderBase]: For 614936/614940 co-relation queries the response was YES. [2024-06-20 16:23:14,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55110 conditions, 6063 events. 3947/6063 cut-off events. For 614936/614940 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33327 event pairs, 1046 based on Foata normal form. 26/6088 useless extension candidates. Maximal degree in co-relation 54974. Up to 4744 conditions per place. [2024-06-20 16:23:14,684 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 135 changer transitions 0/502 dead transitions. [2024-06-20 16:23:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 502 transitions, 9029 flow [2024-06-20 16:23:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:23:14,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 16:23:14,686 INFO L175 Difference]: Start difference. First operand has 307 places, 466 transitions, 7835 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:23:14,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 502 transitions, 9029 flow [2024-06-20 16:23:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 502 transitions, 8959 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:16,238 INFO L231 Difference]: Finished difference. Result has 309 places, 468 transitions, 8122 flow [2024-06-20 16:23:16,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8122, PETRI_PLACES=309, PETRI_TRANSITIONS=468} [2024-06-20 16:23:16,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 16:23:16,239 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 468 transitions, 8122 flow [2024-06-20 16:23:16,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:16,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:16,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:16,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:23:16,239 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:16,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash 311518624, now seen corresponding path program 8 times [2024-06-20 16:23:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514391554] [2024-06-20 16:23:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:16,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:17,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:17,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514391554] [2024-06-20 16:23:17,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514391554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:17,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:17,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:23:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993144255] [2024-06-20 16:23:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:23:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:23:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:23:17,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:17,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 468 transitions, 8122 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:17,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:17,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:17,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:18,993 INFO L124 PetriNetUnfolderBase]: 3968/6104 cut-off events. [2024-06-20 16:23:18,993 INFO L125 PetriNetUnfolderBase]: For 627449/627467 co-relation queries the response was YES. [2024-06-20 16:23:19,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55760 conditions, 6104 events. 3968/6104 cut-off events. For 627449/627467 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33874 event pairs, 1077 based on Foata normal form. 40/6143 useless extension candidates. Maximal degree in co-relation 55623. Up to 4668 conditions per place. [2024-06-20 16:23:19,058 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 133 changer transitions 0/499 dead transitions. [2024-06-20 16:23:19,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 499 transitions, 9232 flow [2024-06-20 16:23:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:23:19,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:19,060 INFO L175 Difference]: Start difference. First operand has 309 places, 468 transitions, 8122 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:23:19,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 499 transitions, 9232 flow [2024-06-20 16:23:20,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 499 transitions, 8906 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:20,857 INFO L231 Difference]: Finished difference. Result has 311 places, 469 transitions, 8103 flow [2024-06-20 16:23:20,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7796, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8103, PETRI_PLACES=311, PETRI_TRANSITIONS=469} [2024-06-20 16:23:20,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 16:23:20,858 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 469 transitions, 8103 flow [2024-06-20 16:23:20,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:20,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:20,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:20,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:23:20,858 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:20,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash -41800288, now seen corresponding path program 9 times [2024-06-20 16:23:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:20,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205832909] [2024-06-20 16:23:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:22,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:22,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205832909] [2024-06-20 16:23:22,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205832909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:22,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:23:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355262702] [2024-06-20 16:23:22,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:23:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:23:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:23:22,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:22,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 469 transitions, 8103 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:22,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:22,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:22,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:23,589 INFO L124 PetriNetUnfolderBase]: 3948/6073 cut-off events. [2024-06-20 16:23:23,590 INFO L125 PetriNetUnfolderBase]: For 579750/579752 co-relation queries the response was YES. [2024-06-20 16:23:23,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54579 conditions, 6073 events. 3948/6073 cut-off events. For 579750/579752 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33628 event pairs, 1468 based on Foata normal form. 12/6084 useless extension candidates. Maximal degree in co-relation 54441. Up to 5688 conditions per place. [2024-06-20 16:23:23,654 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 19 changer transitions 0/496 dead transitions. [2024-06-20 16:23:23,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 496 transitions, 9111 flow [2024-06-20 16:23:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:23:23,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 16:23:23,656 INFO L175 Difference]: Start difference. First operand has 311 places, 469 transitions, 8103 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:23:23,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 496 transitions, 9111 flow [2024-06-20 16:23:25,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 496 transitions, 8804 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:25,343 INFO L231 Difference]: Finished difference. Result has 312 places, 468 transitions, 7778 flow [2024-06-20 16:23:25,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7778, PETRI_PLACES=312, PETRI_TRANSITIONS=468} [2024-06-20 16:23:25,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-20 16:23:25,344 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 468 transitions, 7778 flow [2024-06-20 16:23:25,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:25,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:23:25,344 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)] === [2024-06-20 16:23:25,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1190463655, now seen corresponding path program 8 times [2024-06-20 16:23:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:25,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089743822] [2024-06-20 16:23:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:26,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:26,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089743822] [2024-06-20 16:23:26,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089743822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:26,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:26,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530978257] [2024-06-20 16:23:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:26,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:26,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 468 transitions, 7778 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:26,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:26,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:26,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:27,606 INFO L124 PetriNetUnfolderBase]: 4075/6211 cut-off events. [2024-06-20 16:23:27,606 INFO L125 PetriNetUnfolderBase]: For 564314/564316 co-relation queries the response was YES. [2024-06-20 16:23:27,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54578 conditions, 6211 events. 4075/6211 cut-off events. For 564314/564316 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 33996 event pairs, 1572 based on Foata normal form. 4/6214 useless extension candidates. Maximal degree in co-relation 54439. Up to 6096 conditions per place. [2024-06-20 16:23:27,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 447 selfloop transitions, 37 changer transitions 0/487 dead transitions. [2024-06-20 16:23:27,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 487 transitions, 9062 flow [2024-06-20 16:23:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:23:27,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:23:27,667 INFO L175 Difference]: Start difference. First operand has 312 places, 468 transitions, 7778 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:23:27,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 487 transitions, 9062 flow [2024-06-20 16:23:28,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 487 transitions, 8978 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:28,983 INFO L231 Difference]: Finished difference. Result has 315 places, 476 transitions, 7961 flow [2024-06-20 16:23:28,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7700, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7961, PETRI_PLACES=315, PETRI_TRANSITIONS=476} [2024-06-20 16:23:28,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 16:23:28,983 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 476 transitions, 7961 flow [2024-06-20 16:23:28,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:28,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:28,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:28,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:23:28,984 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)] === [2024-06-20 16:23:28,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:28,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1190463252, now seen corresponding path program 3 times [2024-06-20 16:23:28,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:28,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854165318] [2024-06-20 16:23:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:28,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:29,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:29,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854165318] [2024-06-20 16:23:29,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854165318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:29,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:29,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:29,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068612594] [2024-06-20 16:23:29,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:29,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:29,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:29,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 476 transitions, 7961 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:29,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:29,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:29,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:31,201 INFO L124 PetriNetUnfolderBase]: 4114/6264 cut-off events. [2024-06-20 16:23:31,201 INFO L125 PetriNetUnfolderBase]: For 556869/556869 co-relation queries the response was YES. [2024-06-20 16:23:31,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54852 conditions, 6264 events. 4114/6264 cut-off events. For 556869/556869 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 34282 event pairs, 1570 based on Foata normal form. 3/6266 useless extension candidates. Maximal degree in co-relation 54711. Up to 6169 conditions per place. [2024-06-20 16:23:31,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 27 changer transitions 0/501 dead transitions. [2024-06-20 16:23:31,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 501 transitions, 9375 flow [2024-06-20 16:23:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:23:31,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:23:31,276 INFO L175 Difference]: Start difference. First operand has 315 places, 476 transitions, 7961 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:23:31,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 501 transitions, 9375 flow [2024-06-20 16:23:32,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 501 transitions, 9250 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:32,901 INFO L231 Difference]: Finished difference. Result has 318 places, 486 transitions, 8152 flow [2024-06-20 16:23:32,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7836, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8152, PETRI_PLACES=318, PETRI_TRANSITIONS=486} [2024-06-20 16:23:32,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-20 16:23:32,901 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 486 transitions, 8152 flow [2024-06-20 16:23:32,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:32,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:32,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:32,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:23:32,902 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)] === [2024-06-20 16:23:32,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash 580998747, now seen corresponding path program 9 times [2024-06-20 16:23:32,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:32,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231167384] [2024-06-20 16:23:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:32,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231167384] [2024-06-20 16:23:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231167384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:33,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:33,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:33,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713134145] [2024-06-20 16:23:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:33,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:33,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:33,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:33,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 486 transitions, 8152 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:33,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:33,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:33,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:35,100 INFO L124 PetriNetUnfolderBase]: 4126/6282 cut-off events. [2024-06-20 16:23:35,100 INFO L125 PetriNetUnfolderBase]: For 571301/571303 co-relation queries the response was YES. [2024-06-20 16:23:35,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55152 conditions, 6282 events. 4126/6282 cut-off events. For 571301/571303 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 34341 event pairs, 1573 based on Foata normal form. 4/6285 useless extension candidates. Maximal degree in co-relation 55010. Up to 6105 conditions per place. [2024-06-20 16:23:35,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 55 changer transitions 0/502 dead transitions. [2024-06-20 16:23:35,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 502 transitions, 9524 flow [2024-06-20 16:23:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:23:35,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:23:35,175 INFO L175 Difference]: Start difference. First operand has 318 places, 486 transitions, 8152 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:23:35,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 502 transitions, 9524 flow [2024-06-20 16:23:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 502 transitions, 9395 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:36,683 INFO L231 Difference]: Finished difference. Result has 323 places, 490 transitions, 8227 flow [2024-06-20 16:23:36,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8227, PETRI_PLACES=323, PETRI_TRANSITIONS=490} [2024-06-20 16:23:36,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 16:23:36,683 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 490 transitions, 8227 flow [2024-06-20 16:23:36,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:36,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:36,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:36,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:23:36,684 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)] === [2024-06-20 16:23:36,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash 594331630, now seen corresponding path program 4 times [2024-06-20 16:23:36,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:36,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661510076] [2024-06-20 16:23:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:36,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:37,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:37,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661510076] [2024-06-20 16:23:37,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661510076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:37,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:37,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:37,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894494885] [2024-06-20 16:23:37,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:37,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:37,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:37,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:37,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:37,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 490 transitions, 8227 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:37,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:37,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:37,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:38,840 INFO L124 PetriNetUnfolderBase]: 4117/6269 cut-off events. [2024-06-20 16:23:38,840 INFO L125 PetriNetUnfolderBase]: For 582272/582272 co-relation queries the response was YES. [2024-06-20 16:23:38,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55112 conditions, 6269 events. 4117/6269 cut-off events. For 582272/582272 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 34344 event pairs, 1567 based on Foata normal form. 3/6271 useless extension candidates. Maximal degree in co-relation 54968. Up to 6191 conditions per place. [2024-06-20 16:23:38,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 479 selfloop transitions, 20 changer transitions 0/502 dead transitions. [2024-06-20 16:23:38,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 502 transitions, 9266 flow [2024-06-20 16:23:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 16:23:38,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-20 16:23:38,914 INFO L175 Difference]: Start difference. First operand has 323 places, 490 transitions, 8227 flow. Second operand 8 states and 121 transitions. [2024-06-20 16:23:38,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 502 transitions, 9266 flow [2024-06-20 16:23:40,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 502 transitions, 8787 flow, removed 69 selfloop flow, removed 10 redundant places. [2024-06-20 16:23:40,620 INFO L231 Difference]: Finished difference. Result has 321 places, 490 transitions, 7796 flow [2024-06-20 16:23:40,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7748, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7796, PETRI_PLACES=321, PETRI_TRANSITIONS=490} [2024-06-20 16:23:40,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-20 16:23:40,621 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 490 transitions, 7796 flow [2024-06-20 16:23:40,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:40,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:40,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:23:40,621 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)] === [2024-06-20 16:23:40,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 580999150, now seen corresponding path program 5 times [2024-06-20 16:23:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674740141] [2024-06-20 16:23:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:41,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:41,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674740141] [2024-06-20 16:23:41,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674740141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:41,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:41,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:41,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467588599] [2024-06-20 16:23:41,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:41,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:41,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:41,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:41,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 490 transitions, 7796 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:41,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:41,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:41,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:42,765 INFO L124 PetriNetUnfolderBase]: 4108/6257 cut-off events. [2024-06-20 16:23:42,765 INFO L125 PetriNetUnfolderBase]: For 585842/585842 co-relation queries the response was YES. [2024-06-20 16:23:42,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54367 conditions, 6257 events. 4108/6257 cut-off events. For 585842/585842 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 34210 event pairs, 1565 based on Foata normal form. 3/6259 useless extension candidates. Maximal degree in co-relation 54225. Up to 6152 conditions per place. [2024-06-20 16:23:42,841 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 36 changer transitions 0/504 dead transitions. [2024-06-20 16:23:42,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 504 transitions, 8846 flow [2024-06-20 16:23:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:23:42,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:23:42,843 INFO L175 Difference]: Start difference. First operand has 321 places, 490 transitions, 7796 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:23:42,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 504 transitions, 8846 flow [2024-06-20 16:23:44,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 504 transitions, 8736 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 16:23:44,141 INFO L231 Difference]: Finished difference. Result has 322 places, 490 transitions, 7766 flow [2024-06-20 16:23:44,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7686, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7766, PETRI_PLACES=322, PETRI_TRANSITIONS=490} [2024-06-20 16:23:44,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-20 16:23:44,142 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 490 transitions, 7766 flow [2024-06-20 16:23:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:44,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:44,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:23:44,143 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)] === [2024-06-20 16:23:44,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:44,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1203361825, now seen corresponding path program 10 times [2024-06-20 16:23:44,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:44,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874425024] [2024-06-20 16:23:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:44,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:44,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874425024] [2024-06-20 16:23:44,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874425024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:44,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043770684] [2024-06-20 16:23:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:44,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:44,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:44,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:44,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 490 transitions, 7766 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:44,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:44,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:44,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:46,298 INFO L124 PetriNetUnfolderBase]: 4102/6250 cut-off events. [2024-06-20 16:23:46,298 INFO L125 PetriNetUnfolderBase]: For 594697/594699 co-relation queries the response was YES. [2024-06-20 16:23:46,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54384 conditions, 6250 events. 4102/6250 cut-off events. For 594697/594699 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 34247 event pairs, 1569 based on Foata normal form. 4/6253 useless extension candidates. Maximal degree in co-relation 54241. Up to 6076 conditions per place. [2024-06-20 16:23:46,371 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 438 selfloop transitions, 60 changer transitions 0/501 dead transitions. [2024-06-20 16:23:46,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 501 transitions, 8930 flow [2024-06-20 16:23:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:23:46,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:23:46,372 INFO L175 Difference]: Start difference. First operand has 322 places, 490 transitions, 7766 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:23:46,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 501 transitions, 8930 flow [2024-06-20 16:23:47,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 501 transitions, 8733 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-20 16:23:47,972 INFO L231 Difference]: Finished difference. Result has 322 places, 490 transitions, 7696 flow [2024-06-20 16:23:47,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7569, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7696, PETRI_PLACES=322, PETRI_TRANSITIONS=490} [2024-06-20 16:23:47,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-20 16:23:47,973 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 490 transitions, 7696 flow [2024-06-20 16:23:47,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:47,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:47,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:47,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:23:47,973 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)] === [2024-06-20 16:23:47,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1203362166, now seen corresponding path program 6 times [2024-06-20 16:23:47,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:47,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144181943] [2024-06-20 16:23:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:47,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:48,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144181943] [2024-06-20 16:23:48,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144181943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:48,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236214377] [2024-06-20 16:23:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:48,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:48,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:48,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 490 transitions, 7696 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:48,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:48,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:48,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:50,233 INFO L124 PetriNetUnfolderBase]: 3996/6142 cut-off events. [2024-06-20 16:23:50,233 INFO L125 PetriNetUnfolderBase]: For 608329/608331 co-relation queries the response was YES. [2024-06-20 16:23:50,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53856 conditions, 6142 events. 3996/6142 cut-off events. For 608329/608331 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 34125 event pairs, 1501 based on Foata normal form. 4/6145 useless extension candidates. Maximal degree in co-relation 53713. Up to 5854 conditions per place. [2024-06-20 16:23:50,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 438 selfloop transitions, 36 changer transitions 0/501 dead transitions. [2024-06-20 16:23:50,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 501 transitions, 8689 flow [2024-06-20 16:23:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:23:50,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:23:50,305 INFO L175 Difference]: Start difference. First operand has 322 places, 490 transitions, 7696 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:23:50,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 501 transitions, 8689 flow [2024-06-20 16:23:51,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 501 transitions, 8478 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:51,591 INFO L231 Difference]: Finished difference. Result has 324 places, 491 transitions, 7577 flow [2024-06-20 16:23:51,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7485, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7577, PETRI_PLACES=324, PETRI_TRANSITIONS=491} [2024-06-20 16:23:51,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-20 16:23:51,591 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 491 transitions, 7577 flow [2024-06-20 16:23:51,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:51,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:51,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:23:51,592 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)] === [2024-06-20 16:23:51,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -887346133, now seen corresponding path program 1 times [2024-06-20 16:23:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397847436] [2024-06-20 16:23:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:52,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:52,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397847436] [2024-06-20 16:23:52,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397847436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:52,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:52,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779380497] [2024-06-20 16:23:52,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:52,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:52,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 491 transitions, 7577 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:52,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:52,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:52,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:53,974 INFO L124 PetriNetUnfolderBase]: 4106/6255 cut-off events. [2024-06-20 16:23:53,975 INFO L125 PetriNetUnfolderBase]: For 621037/621037 co-relation queries the response was YES. [2024-06-20 16:23:54,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54508 conditions, 6255 events. 4106/6255 cut-off events. For 621037/621037 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34239 event pairs, 1566 based on Foata normal form. 2/6256 useless extension candidates. Maximal degree in co-relation 54364. Up to 6152 conditions per place. [2024-06-20 16:23:54,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 20 changer transitions 0/512 dead transitions. [2024-06-20 16:23:54,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 512 transitions, 8717 flow [2024-06-20 16:23:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:23:54,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:23:54,041 INFO L175 Difference]: Start difference. First operand has 324 places, 491 transitions, 7577 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:23:54,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 512 transitions, 8717 flow [2024-06-20 16:23:55,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 512 transitions, 8622 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:55,436 INFO L231 Difference]: Finished difference. Result has 326 places, 494 transitions, 7578 flow [2024-06-20 16:23:55,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7482, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7578, PETRI_PLACES=326, PETRI_TRANSITIONS=494} [2024-06-20 16:23:55,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-20 16:23:55,437 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 494 transitions, 7578 flow [2024-06-20 16:23:55,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:55,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:55,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:55,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:23:55,437 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)] === [2024-06-20 16:23:55,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1596474509, now seen corresponding path program 2 times [2024-06-20 16:23:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:55,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228186013] [2024-06-20 16:23:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:56,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228186013] [2024-06-20 16:23:56,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228186013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:56,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:56,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:56,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145025437] [2024-06-20 16:23:56,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:56,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:56,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:56,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:23:56,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 494 transitions, 7578 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:56,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:56,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:23:56,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:57,770 INFO L124 PetriNetUnfolderBase]: 4132/6291 cut-off events. [2024-06-20 16:23:57,771 INFO L125 PetriNetUnfolderBase]: For 642325/642325 co-relation queries the response was YES. [2024-06-20 16:23:57,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55448 conditions, 6291 events. 4132/6291 cut-off events. For 642325/642325 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34455 event pairs, 1569 based on Foata normal form. 2/6292 useless extension candidates. Maximal degree in co-relation 55303. Up to 6123 conditions per place. [2024-06-20 16:23:57,846 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 46 changer transitions 0/522 dead transitions. [2024-06-20 16:23:57,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 522 transitions, 9114 flow [2024-06-20 16:23:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:23:57,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:23:57,847 INFO L175 Difference]: Start difference. First operand has 326 places, 494 transitions, 7578 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:23:57,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 522 transitions, 9114 flow [2024-06-20 16:23:59,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 522 transitions, 9042 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:59,285 INFO L231 Difference]: Finished difference. Result has 328 places, 503 transitions, 7760 flow [2024-06-20 16:23:59,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7506, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7760, PETRI_PLACES=328, PETRI_TRANSITIONS=503} [2024-06-20 16:23:59,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-20 16:23:59,286 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 503 transitions, 7760 flow [2024-06-20 16:23:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:59,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:59,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:23:59,286 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)] === [2024-06-20 16:23:59,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1396932397, now seen corresponding path program 3 times [2024-06-20 16:23:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451882966] [2024-06-20 16:23:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:00,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:00,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451882966] [2024-06-20 16:24:00,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451882966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:00,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:00,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174752194] [2024-06-20 16:24:00,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:00,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:00,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:00,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:00,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:00,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 503 transitions, 7760 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:00,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:00,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:00,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:01,614 INFO L124 PetriNetUnfolderBase]: 4126/6283 cut-off events. [2024-06-20 16:24:01,614 INFO L125 PetriNetUnfolderBase]: For 656871/656871 co-relation queries the response was YES. [2024-06-20 16:24:01,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55856 conditions, 6283 events. 4126/6283 cut-off events. For 656871/656871 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34450 event pairs, 1566 based on Foata normal form. 2/6284 useless extension candidates. Maximal degree in co-relation 55710. Up to 6118 conditions per place. [2024-06-20 16:24:01,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 47 changer transitions 0/521 dead transitions. [2024-06-20 16:24:01,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 521 transitions, 9006 flow [2024-06-20 16:24:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:24:01,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 16:24:01,692 INFO L175 Difference]: Start difference. First operand has 328 places, 503 transitions, 7760 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:24:01,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 521 transitions, 9006 flow [2024-06-20 16:24:03,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 521 transitions, 8900 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:03,255 INFO L231 Difference]: Finished difference. Result has 333 places, 503 transitions, 7754 flow [2024-06-20 16:24:03,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7654, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7754, PETRI_PLACES=333, PETRI_TRANSITIONS=503} [2024-06-20 16:24:03,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-20 16:24:03,256 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 503 transitions, 7754 flow [2024-06-20 16:24:03,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:03,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:03,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:03,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:24:03,256 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)] === [2024-06-20 16:24:03,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -609390802, now seen corresponding path program 1 times [2024-06-20 16:24:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:03,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565984856] [2024-06-20 16:24:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565984856] [2024-06-20 16:24:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565984856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:03,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137634585] [2024-06-20 16:24:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:04,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:04,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 503 transitions, 7754 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:04,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:04,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:04,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:05,579 INFO L124 PetriNetUnfolderBase]: 4141/6304 cut-off events. [2024-06-20 16:24:05,579 INFO L125 PetriNetUnfolderBase]: For 676443/676443 co-relation queries the response was YES. [2024-06-20 16:24:05,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56259 conditions, 6304 events. 4141/6304 cut-off events. For 676443/676443 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34535 event pairs, 1569 based on Foata normal form. 3/6306 useless extension candidates. Maximal degree in co-relation 56111. Up to 6174 conditions per place. [2024-06-20 16:24:05,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 490 selfloop transitions, 35 changer transitions 0/528 dead transitions. [2024-06-20 16:24:05,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 528 transitions, 9114 flow [2024-06-20 16:24:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:24:05,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:24:05,656 INFO L175 Difference]: Start difference. First operand has 333 places, 503 transitions, 7754 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:24:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 528 transitions, 9114 flow [2024-06-20 16:24:07,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 528 transitions, 9012 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:07,584 INFO L231 Difference]: Finished difference. Result has 334 places, 509 transitions, 7830 flow [2024-06-20 16:24:07,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7830, PETRI_PLACES=334, PETRI_TRANSITIONS=509} [2024-06-20 16:24:07,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 16:24:07,584 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 509 transitions, 7830 flow [2024-06-20 16:24:07,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:07,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:07,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:24:07,585 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)] === [2024-06-20 16:24:07,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1726421741, now seen corresponding path program 4 times [2024-06-20 16:24:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576194341] [2024-06-20 16:24:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576194341] [2024-06-20 16:24:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576194341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183666515] [2024-06-20 16:24:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:08,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:08,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 509 transitions, 7830 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:08,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:08,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:08,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:09,992 INFO L124 PetriNetUnfolderBase]: 4151/6319 cut-off events. [2024-06-20 16:24:09,993 INFO L125 PetriNetUnfolderBase]: For 693225/693227 co-relation queries the response was YES. [2024-06-20 16:24:10,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56898 conditions, 6319 events. 4151/6319 cut-off events. For 693225/693227 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 34631 event pairs, 1577 based on Foata normal form. 2/6320 useless extension candidates. Maximal degree in co-relation 56749. Up to 6149 conditions per place. [2024-06-20 16:24:10,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 50 changer transitions 0/526 dead transitions. [2024-06-20 16:24:10,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 526 transitions, 9122 flow [2024-06-20 16:24:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:24:10,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:24:10,076 INFO L175 Difference]: Start difference. First operand has 334 places, 509 transitions, 7830 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:24:10,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 526 transitions, 9122 flow [2024-06-20 16:24:12,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 526 transitions, 9053 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:12,133 INFO L231 Difference]: Finished difference. Result has 338 places, 512 transitions, 7921 flow [2024-06-20 16:24:12,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7921, PETRI_PLACES=338, PETRI_TRANSITIONS=512} [2024-06-20 16:24:12,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-20 16:24:12,133 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 512 transitions, 7921 flow [2024-06-20 16:24:12,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:12,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:12,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:12,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:24:12,134 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)] === [2024-06-20 16:24:12,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1452376372, now seen corresponding path program 2 times [2024-06-20 16:24:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:12,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240990700] [2024-06-20 16:24:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240990700] [2024-06-20 16:24:12,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240990700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:12,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:12,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322888730] [2024-06-20 16:24:12,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:12,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:12,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:12,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 512 transitions, 7921 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:12,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:12,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:12,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:14,539 INFO L124 PetriNetUnfolderBase]: 4190/6373 cut-off events. [2024-06-20 16:24:14,539 INFO L125 PetriNetUnfolderBase]: For 722715/722717 co-relation queries the response was YES. [2024-06-20 16:24:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57803 conditions, 6373 events. 4190/6373 cut-off events. For 722715/722717 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34944 event pairs, 1570 based on Foata normal form. 5/6377 useless extension candidates. Maximal degree in co-relation 57652. Up to 6223 conditions per place. [2024-06-20 16:24:14,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 42 changer transitions 0/536 dead transitions. [2024-06-20 16:24:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 536 transitions, 9441 flow [2024-06-20 16:24:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:24:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:24:14,619 INFO L175 Difference]: Start difference. First operand has 338 places, 512 transitions, 7921 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:24:14,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 536 transitions, 9441 flow [2024-06-20 16:24:17,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 536 transitions, 9277 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:17,237 INFO L231 Difference]: Finished difference. Result has 340 places, 518 transitions, 7947 flow [2024-06-20 16:24:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7757, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7947, PETRI_PLACES=340, PETRI_TRANSITIONS=518} [2024-06-20 16:24:17,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-20 16:24:17,238 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 518 transitions, 7947 flow [2024-06-20 16:24:17,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:24:17,239 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)] === [2024-06-20 16:24:17,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1197630390, now seen corresponding path program 3 times [2024-06-20 16:24:17,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343271581] [2024-06-20 16:24:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343271581] [2024-06-20 16:24:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343271581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:17,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304097107] [2024-06-20 16:24:17,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:18,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:18,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 518 transitions, 7947 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:18,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:18,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:18,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:19,685 INFO L124 PetriNetUnfolderBase]: 4181/6361 cut-off events. [2024-06-20 16:24:19,685 INFO L125 PetriNetUnfolderBase]: For 731877/731879 co-relation queries the response was YES. [2024-06-20 16:24:19,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57642 conditions, 6361 events. 4181/6361 cut-off events. For 731877/731879 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34828 event pairs, 1568 based on Foata normal form. 5/6365 useless extension candidates. Maximal degree in co-relation 57490. Up to 6216 conditions per place. [2024-06-20 16:24:19,765 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 41 changer transitions 0/535 dead transitions. [2024-06-20 16:24:19,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 535 transitions, 9219 flow [2024-06-20 16:24:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:24:19,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:24:19,766 INFO L175 Difference]: Start difference. First operand has 340 places, 518 transitions, 7947 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:24:19,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 535 transitions, 9219 flow [2024-06-20 16:24:22,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 535 transitions, 9094 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:22,463 INFO L231 Difference]: Finished difference. Result has 344 places, 518 transitions, 7910 flow [2024-06-20 16:24:22,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7822, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7910, PETRI_PLACES=344, PETRI_TRANSITIONS=518} [2024-06-20 16:24:22,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-20 16:24:22,463 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 518 transitions, 7910 flow [2024-06-20 16:24:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:22,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:22,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:22,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:24:22,464 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)] === [2024-06-20 16:24:22,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 586718805, now seen corresponding path program 5 times [2024-06-20 16:24:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472304764] [2024-06-20 16:24:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:22,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472304764] [2024-06-20 16:24:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472304764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:23,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:23,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:23,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078923155] [2024-06-20 16:24:23,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:23,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:23,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:23,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 518 transitions, 7910 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:23,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:23,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:23,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:24,939 INFO L124 PetriNetUnfolderBase]: 4191/6375 cut-off events. [2024-06-20 16:24:24,939 INFO L125 PetriNetUnfolderBase]: For 746019/746021 co-relation queries the response was YES. [2024-06-20 16:24:24,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57774 conditions, 6375 events. 4191/6375 cut-off events. For 746019/746021 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34953 event pairs, 1577 based on Foata normal form. 2/6376 useless extension candidates. Maximal degree in co-relation 57621. Up to 6201 conditions per place. [2024-06-20 16:24:25,012 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 52 changer transitions 0/536 dead transitions. [2024-06-20 16:24:25,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 536 transitions, 9218 flow [2024-06-20 16:24:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:24:25,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:24:25,013 INFO L175 Difference]: Start difference. First operand has 344 places, 518 transitions, 7910 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:24:25,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 536 transitions, 9218 flow [2024-06-20 16:24:27,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 536 transitions, 9083 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:27,662 INFO L231 Difference]: Finished difference. Result has 344 places, 521 transitions, 7925 flow [2024-06-20 16:24:27,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7925, PETRI_PLACES=344, PETRI_TRANSITIONS=521} [2024-06-20 16:24:27,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-20 16:24:27,663 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 521 transitions, 7925 flow [2024-06-20 16:24:27,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:27,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:27,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:24:27,664 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)] === [2024-06-20 16:24:27,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash 594070455, now seen corresponding path program 6 times [2024-06-20 16:24:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:27,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000923312] [2024-06-20 16:24:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:28,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000923312] [2024-06-20 16:24:28,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000923312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:28,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:28,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:28,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678313232] [2024-06-20 16:24:28,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:28,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:28,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 521 transitions, 7925 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:28,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:28,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:28,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:30,146 INFO L124 PetriNetUnfolderBase]: 4185/6367 cut-off events. [2024-06-20 16:24:30,147 INFO L125 PetriNetUnfolderBase]: For 758050/758052 co-relation queries the response was YES. [2024-06-20 16:24:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57787 conditions, 6367 events. 4185/6367 cut-off events. For 758050/758052 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34878 event pairs, 1574 based on Foata normal form. 2/6368 useless extension candidates. Maximal degree in co-relation 57633. Up to 6196 conditions per place. [2024-06-20 16:24:30,216 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 476 selfloop transitions, 55 changer transitions 0/534 dead transitions. [2024-06-20 16:24:30,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 534 transitions, 9033 flow [2024-06-20 16:24:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:24:30,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:24:30,217 INFO L175 Difference]: Start difference. First operand has 344 places, 521 transitions, 7925 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:24:30,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 534 transitions, 9033 flow [2024-06-20 16:24:32,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 534 transitions, 8897 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:32,595 INFO L231 Difference]: Finished difference. Result has 347 places, 521 transitions, 7905 flow [2024-06-20 16:24:32,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7905, PETRI_PLACES=347, PETRI_TRANSITIONS=521} [2024-06-20 16:24:32,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-20 16:24:32,596 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 521 transitions, 7905 flow [2024-06-20 16:24:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:32,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:32,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:32,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:24:32,596 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)] === [2024-06-20 16:24:32,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1190011830, now seen corresponding path program 4 times [2024-06-20 16:24:32,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:32,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076287036] [2024-06-20 16:24:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:33,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:33,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076287036] [2024-06-20 16:24:33,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076287036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:33,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:33,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326657166] [2024-06-20 16:24:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:33,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:33,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:33,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:33,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 521 transitions, 7905 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:33,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:33,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:35,112 INFO L124 PetriNetUnfolderBase]: 4176/6355 cut-off events. [2024-06-20 16:24:35,113 INFO L125 PetriNetUnfolderBase]: For 769519/769521 co-relation queries the response was YES. [2024-06-20 16:24:35,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57668 conditions, 6355 events. 4176/6355 cut-off events. For 769519/769521 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34867 event pairs, 1565 based on Foata normal form. 5/6359 useless extension candidates. Maximal degree in co-relation 57513. Up to 6215 conditions per place. [2024-06-20 16:24:35,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 488 selfloop transitions, 44 changer transitions 0/535 dead transitions. [2024-06-20 16:24:35,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 535 transitions, 9019 flow [2024-06-20 16:24:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:24:35,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:24:35,183 INFO L175 Difference]: Start difference. First operand has 347 places, 521 transitions, 7905 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:24:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 535 transitions, 9019 flow [2024-06-20 16:24:37,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 535 transitions, 8867 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:37,552 INFO L231 Difference]: Finished difference. Result has 347 places, 521 transitions, 7848 flow [2024-06-20 16:24:37,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7753, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7848, PETRI_PLACES=347, PETRI_TRANSITIONS=521} [2024-06-20 16:24:37,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-20 16:24:37,553 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 521 transitions, 7848 flow [2024-06-20 16:24:37,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:37,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:37,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:37,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:24:37,553 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)] === [2024-06-20 16:24:37,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash 169919256, now seen corresponding path program 1 times [2024-06-20 16:24:37,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:37,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281500731] [2024-06-20 16:24:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:37,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:38,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281500731] [2024-06-20 16:24:38,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281500731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:38,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:38,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646411342] [2024-06-20 16:24:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:38,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:38,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:38,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:38,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:38,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 521 transitions, 7848 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:38,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:38,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:38,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:40,154 INFO L124 PetriNetUnfolderBase]: 4145/6350 cut-off events. [2024-06-20 16:24:40,154 INFO L125 PetriNetUnfolderBase]: For 808476/808495 co-relation queries the response was YES. [2024-06-20 16:24:40,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58368 conditions, 6350 events. 4145/6350 cut-off events. For 808476/808495 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35226 event pairs, 997 based on Foata normal form. 18/6361 useless extension candidates. Maximal degree in co-relation 58212. Up to 5533 conditions per place. [2024-06-20 16:24:40,224 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 373 selfloop transitions, 163 changer transitions 0/569 dead transitions. [2024-06-20 16:24:40,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 569 transitions, 9406 flow [2024-06-20 16:24:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:24:40,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-20 16:24:40,225 INFO L175 Difference]: Start difference. First operand has 347 places, 521 transitions, 7848 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:24:40,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 569 transitions, 9406 flow [2024-06-20 16:24:42,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 569 transitions, 9306 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:42,464 INFO L231 Difference]: Finished difference. Result has 352 places, 531 transitions, 8285 flow [2024-06-20 16:24:42,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7748, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8285, PETRI_PLACES=352, PETRI_TRANSITIONS=531} [2024-06-20 16:24:42,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 16:24:42,465 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 531 transitions, 8285 flow [2024-06-20 16:24:42,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:42,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:42,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:42,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:24:42,466 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)] === [2024-06-20 16:24:42,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1176391406, now seen corresponding path program 2 times [2024-06-20 16:24:42,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:42,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959183808] [2024-06-20 16:24:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:42,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:43,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959183808] [2024-06-20 16:24:43,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959183808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:43,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:43,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:43,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800413518] [2024-06-20 16:24:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:43,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:43,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:43,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 531 transitions, 8285 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:45,114 INFO L124 PetriNetUnfolderBase]: 4229/6484 cut-off events. [2024-06-20 16:24:45,114 INFO L125 PetriNetUnfolderBase]: For 838700/838716 co-relation queries the response was YES. [2024-06-20 16:24:45,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60749 conditions, 6484 events. 4229/6484 cut-off events. For 838700/838716 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36339 event pairs, 1094 based on Foata normal form. 18/6501 useless extension candidates. Maximal degree in co-relation 60590. Up to 5663 conditions per place. [2024-06-20 16:24:45,184 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 391 selfloop transitions, 153 changer transitions 0/577 dead transitions. [2024-06-20 16:24:45,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 577 transitions, 10085 flow [2024-06-20 16:24:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:24:45,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-20 16:24:45,185 INFO L175 Difference]: Start difference. First operand has 352 places, 531 transitions, 8285 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:24:45,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 577 transitions, 10085 flow [2024-06-20 16:24:47,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 577 transitions, 9622 flow, removed 130 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:47,642 INFO L231 Difference]: Finished difference. Result has 356 places, 543 transitions, 8424 flow [2024-06-20 16:24:47,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8424, PETRI_PLACES=356, PETRI_TRANSITIONS=543} [2024-06-20 16:24:47,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 16:24:47,643 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 543 transitions, 8424 flow [2024-06-20 16:24:47,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:47,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:47,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:47,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:24:47,643 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)] === [2024-06-20 16:24:47,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1391086114, now seen corresponding path program 1 times [2024-06-20 16:24:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:47,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638906790] [2024-06-20 16:24:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:48,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638906790] [2024-06-20 16:24:48,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638906790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:48,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:48,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610857158] [2024-06-20 16:24:48,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:48,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:48,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 543 transitions, 8424 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:48,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:48,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:48,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:50,361 INFO L124 PetriNetUnfolderBase]: 4342/6604 cut-off events. [2024-06-20 16:24:50,361 INFO L125 PetriNetUnfolderBase]: For 847952/847970 co-relation queries the response was YES. [2024-06-20 16:24:50,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61441 conditions, 6604 events. 4342/6604 cut-off events. For 847952/847970 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36564 event pairs, 1145 based on Foata normal form. 18/6621 useless extension candidates. Maximal degree in co-relation 61280. Up to 5782 conditions per place. [2024-06-20 16:24:50,429 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 386 selfloop transitions, 193 changer transitions 0/582 dead transitions. [2024-06-20 16:24:50,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 582 transitions, 10204 flow [2024-06-20 16:24:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:24:50,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 16:24:50,430 INFO L175 Difference]: Start difference. First operand has 356 places, 543 transitions, 8424 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:24:50,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 582 transitions, 10204 flow [2024-06-20 16:24:53,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 582 transitions, 9985 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:53,356 INFO L231 Difference]: Finished difference. Result has 360 places, 554 transitions, 8799 flow [2024-06-20 16:24:53,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8205, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8799, PETRI_PLACES=360, PETRI_TRANSITIONS=554} [2024-06-20 16:24:53,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-20 16:24:53,357 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 554 transitions, 8799 flow [2024-06-20 16:24:53,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:53,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:53,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:53,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:24:53,357 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)] === [2024-06-20 16:24:53,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1176152396, now seen corresponding path program 3 times [2024-06-20 16:24:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510083562] [2024-06-20 16:24:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:54,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:54,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510083562] [2024-06-20 16:24:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510083562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:54,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931366239] [2024-06-20 16:24:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:54,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:54,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 554 transitions, 8799 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:54,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:54,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:54,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:56,044 INFO L124 PetriNetUnfolderBase]: 4249/6507 cut-off events. [2024-06-20 16:24:56,044 INFO L125 PetriNetUnfolderBase]: For 867957/867975 co-relation queries the response was YES. [2024-06-20 16:24:56,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61877 conditions, 6507 events. 4249/6507 cut-off events. For 867957/867975 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36408 event pairs, 1091 based on Foata normal form. 20/6526 useless extension candidates. Maximal degree in co-relation 61714. Up to 5754 conditions per place. [2024-06-20 16:24:56,116 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 399 selfloop transitions, 148 changer transitions 0/583 dead transitions. [2024-06-20 16:24:56,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 583 transitions, 10181 flow [2024-06-20 16:24:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:24:56,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 16:24:56,117 INFO L175 Difference]: Start difference. First operand has 360 places, 554 transitions, 8799 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:24:56,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 583 transitions, 10181 flow [2024-06-20 16:24:58,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 583 transitions, 10013 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:58,281 INFO L231 Difference]: Finished difference. Result has 365 places, 555 transitions, 8944 flow [2024-06-20 16:24:58,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8944, PETRI_PLACES=365, PETRI_TRANSITIONS=555} [2024-06-20 16:24:58,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 16:24:58,281 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 555 transitions, 8944 flow [2024-06-20 16:24:58,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:58,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:58,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:58,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:24:58,282 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)] === [2024-06-20 16:24:58,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1735007146, now seen corresponding path program 1 times [2024-06-20 16:24:58,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:58,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884921367] [2024-06-20 16:24:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884921367] [2024-06-20 16:24:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884921367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596994597] [2024-06-20 16:24:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:59,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:24:59,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 555 transitions, 8944 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:59,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:59,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:24:59,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:01,051 INFO L124 PetriNetUnfolderBase]: 4386/6667 cut-off events. [2024-06-20 16:25:01,051 INFO L125 PetriNetUnfolderBase]: For 904058/904062 co-relation queries the response was YES. [2024-06-20 16:25:01,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63675 conditions, 6667 events. 4386/6667 cut-off events. For 904058/904062 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36947 event pairs, 1275 based on Foata normal form. 10/6676 useless extension candidates. Maximal degree in co-relation 63510. Up to 5978 conditions per place. [2024-06-20 16:25:01,124 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 422 selfloop transitions, 184 changer transitions 0/609 dead transitions. [2024-06-20 16:25:01,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 609 transitions, 10898 flow [2024-06-20 16:25:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:25:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:25:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 16:25:01,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:25:01,125 INFO L175 Difference]: Start difference. First operand has 365 places, 555 transitions, 8944 flow. Second operand 10 states and 182 transitions. [2024-06-20 16:25:01,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 609 transitions, 10898 flow [2024-06-20 16:25:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 609 transitions, 10605 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:25:04,084 INFO L231 Difference]: Finished difference. Result has 370 places, 580 transitions, 9498 flow [2024-06-20 16:25:04,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9498, PETRI_PLACES=370, PETRI_TRANSITIONS=580} [2024-06-20 16:25:04,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 16:25:04,085 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 580 transitions, 9498 flow [2024-06-20 16:25:04,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:04,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:04,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:04,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:25:04,085 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)] === [2024-06-20 16:25:04,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1936905970, now seen corresponding path program 1 times [2024-06-20 16:25:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:04,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273480987] [2024-06-20 16:25:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:04,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273480987] [2024-06-20 16:25:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273480987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:04,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:04,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:04,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947917093] [2024-06-20 16:25:04,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:04,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:04,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:04,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 580 transitions, 9498 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:04,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:04,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:06,821 INFO L124 PetriNetUnfolderBase]: 4411/6745 cut-off events. [2024-06-20 16:25:06,822 INFO L125 PetriNetUnfolderBase]: For 929076/929094 co-relation queries the response was YES. [2024-06-20 16:25:06,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66385 conditions, 6745 events. 4411/6745 cut-off events. For 929076/929094 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37914 event pairs, 1179 based on Foata normal form. 20/6764 useless extension candidates. Maximal degree in co-relation 66217. Up to 6023 conditions per place. [2024-06-20 16:25:06,901 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 525 selfloop transitions, 95 changer transitions 0/656 dead transitions. [2024-06-20 16:25:06,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 656 transitions, 11780 flow [2024-06-20 16:25:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:25:06,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:25:06,902 INFO L175 Difference]: Start difference. First operand has 370 places, 580 transitions, 9498 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:25:06,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 656 transitions, 11780 flow [2024-06-20 16:25:09,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 656 transitions, 11633 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:09,805 INFO L231 Difference]: Finished difference. Result has 378 places, 622 transitions, 10532 flow [2024-06-20 16:25:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9353, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10532, PETRI_PLACES=378, PETRI_TRANSITIONS=622} [2024-06-20 16:25:09,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-20 16:25:09,806 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 622 transitions, 10532 flow [2024-06-20 16:25:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:09,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:09,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:25:09,807 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)] === [2024-06-20 16:25:09,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -989949754, now seen corresponding path program 2 times [2024-06-20 16:25:09,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:09,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158312489] [2024-06-20 16:25:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:10,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:10,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158312489] [2024-06-20 16:25:10,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158312489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:10,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:10,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:10,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310054647] [2024-06-20 16:25:10,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:10,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:10,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:10,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 622 transitions, 10532 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:10,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:10,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:10,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:12,531 INFO L124 PetriNetUnfolderBase]: 4491/6857 cut-off events. [2024-06-20 16:25:12,531 INFO L125 PetriNetUnfolderBase]: For 984847/984865 co-relation queries the response was YES. [2024-06-20 16:25:12,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69405 conditions, 6857 events. 4491/6857 cut-off events. For 984847/984865 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 38605 event pairs, 1200 based on Foata normal form. 20/6876 useless extension candidates. Maximal degree in co-relation 69231. Up to 5811 conditions per place. [2024-06-20 16:25:12,614 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 514 selfloop transitions, 130 changer transitions 0/680 dead transitions. [2024-06-20 16:25:12,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 680 transitions, 12923 flow [2024-06-20 16:25:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:25:12,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-20 16:25:12,615 INFO L175 Difference]: Start difference. First operand has 378 places, 622 transitions, 10532 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:25:12,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 680 transitions, 12923 flow [2024-06-20 16:25:15,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 680 transitions, 12749 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:15,492 INFO L231 Difference]: Finished difference. Result has 386 places, 643 transitions, 11063 flow [2024-06-20 16:25:15,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10358, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11063, PETRI_PLACES=386, PETRI_TRANSITIONS=643} [2024-06-20 16:25:15,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-20 16:25:15,492 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 643 transitions, 11063 flow [2024-06-20 16:25:15,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:15,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:15,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:15,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:25:15,493 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)] === [2024-06-20 16:25:15,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash -989949568, now seen corresponding path program 1 times [2024-06-20 16:25:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:15,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046290387] [2024-06-20 16:25:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:16,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046290387] [2024-06-20 16:25:16,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046290387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:16,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:16,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:16,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789461300] [2024-06-20 16:25:16,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:16,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:16,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:16,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:25:16,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 643 transitions, 11063 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:16,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:16,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:25:16,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:18,220 INFO L124 PetriNetUnfolderBase]: 4607/6984 cut-off events. [2024-06-20 16:25:18,220 INFO L125 PetriNetUnfolderBase]: For 1012931/1012949 co-relation queries the response was YES. [2024-06-20 16:25:18,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71917 conditions, 6984 events. 4607/6984 cut-off events. For 1012931/1012949 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 38906 event pairs, 1283 based on Foata normal form. 20/7003 useless extension candidates. Maximal degree in co-relation 71739. Up to 6445 conditions per place. [2024-06-20 16:25:18,307 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 523 selfloop transitions, 150 changer transitions 0/676 dead transitions. [2024-06-20 16:25:18,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 676 transitions, 13191 flow [2024-06-20 16:25:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:25:18,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:25:18,309 INFO L175 Difference]: Start difference. First operand has 386 places, 643 transitions, 11063 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:25:18,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 676 transitions, 13191 flow [2024-06-20 16:25:22,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 676 transitions, 13071 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-20 16:25:22,651 INFO L231 Difference]: Finished difference. Result has 393 places, 651 transitions, 11424 flow [2024-06-20 16:25:22,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10943, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11424, PETRI_PLACES=393, PETRI_TRANSITIONS=651} [2024-06-20 16:25:22,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-20 16:25:22,652 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 651 transitions, 11424 flow [2024-06-20 16:25:22,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:22,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:22,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:22,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:25:22,652 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)] === [2024-06-20 16:25:22,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1361163232, now seen corresponding path program 2 times [2024-06-20 16:25:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:22,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726048909] [2024-06-20 16:25:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:23,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:23,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726048909] [2024-06-20 16:25:23,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726048909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:23,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:23,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:23,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240404780] [2024-06-20 16:25:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:23,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:25:23,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 651 transitions, 11424 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:23,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:25:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:25,364 INFO L124 PetriNetUnfolderBase]: 4617/7000 cut-off events. [2024-06-20 16:25:25,364 INFO L125 PetriNetUnfolderBase]: For 1035980/1035998 co-relation queries the response was YES. [2024-06-20 16:25:25,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72520 conditions, 7000 events. 4617/7000 cut-off events. For 1035980/1035998 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39040 event pairs, 1266 based on Foata normal form. 20/7019 useless extension candidates. Maximal degree in co-relation 72339. Up to 6455 conditions per place. [2024-06-20 16:25:25,456 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 521 selfloop transitions, 153 changer transitions 0/677 dead transitions. [2024-06-20 16:25:25,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 677 transitions, 13462 flow [2024-06-20 16:25:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:25:25,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:25:25,457 INFO L175 Difference]: Start difference. First operand has 393 places, 651 transitions, 11424 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:25:25,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 677 transitions, 13462 flow [2024-06-20 16:25:29,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 677 transitions, 13227 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:29,154 INFO L231 Difference]: Finished difference. Result has 398 places, 655 transitions, 11596 flow [2024-06-20 16:25:29,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11196, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11596, PETRI_PLACES=398, PETRI_TRANSITIONS=655} [2024-06-20 16:25:29,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-20 16:25:29,155 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 655 transitions, 11596 flow [2024-06-20 16:25:29,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:29,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:29,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:29,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:25:29,155 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)] === [2024-06-20 16:25:29,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash 824031316, now seen corresponding path program 3 times [2024-06-20 16:25:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920077654] [2024-06-20 16:25:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920077654] [2024-06-20 16:25:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920077654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:29,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202594302] [2024-06-20 16:25:29,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:29,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:29,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:29,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:29,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 655 transitions, 11596 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:29,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:29,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:29,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:31,838 INFO L124 PetriNetUnfolderBase]: 4515/6892 cut-off events. [2024-06-20 16:25:31,838 INFO L125 PetriNetUnfolderBase]: For 1056614/1056632 co-relation queries the response was YES. [2024-06-20 16:25:31,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71870 conditions, 6892 events. 4515/6892 cut-off events. For 1056614/1056632 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38732 event pairs, 1206 based on Foata normal form. 20/6911 useless extension candidates. Maximal degree in co-relation 71688. Up to 5839 conditions per place. [2024-06-20 16:25:31,931 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 508 selfloop transitions, 140 changer transitions 0/687 dead transitions. [2024-06-20 16:25:31,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 687 transitions, 13504 flow [2024-06-20 16:25:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:25:31,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:25:31,932 INFO L175 Difference]: Start difference. First operand has 398 places, 655 transitions, 11596 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:25:31,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 687 transitions, 13504 flow [2024-06-20 16:25:35,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 687 transitions, 13194 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:35,987 INFO L231 Difference]: Finished difference. Result has 401 places, 655 transitions, 11573 flow [2024-06-20 16:25:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11286, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11573, PETRI_PLACES=401, PETRI_TRANSITIONS=655} [2024-06-20 16:25:35,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-20 16:25:35,988 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 655 transitions, 11573 flow [2024-06-20 16:25:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:25:35,988 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)] === [2024-06-20 16:25:35,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 824268652, now seen corresponding path program 3 times [2024-06-20 16:25:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:35,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088870102] [2024-06-20 16:25:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:36,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:36,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088870102] [2024-06-20 16:25:36,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088870102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:36,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:36,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:36,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030835717] [2024-06-20 16:25:36,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:36,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:36,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:25:36,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 655 transitions, 11573 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:36,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:36,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:25:36,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:38,661 INFO L124 PetriNetUnfolderBase]: 4599/6976 cut-off events. [2024-06-20 16:25:38,661 INFO L125 PetriNetUnfolderBase]: For 1058408/1058426 co-relation queries the response was YES. [2024-06-20 16:25:38,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72362 conditions, 6976 events. 4599/6976 cut-off events. For 1058408/1058426 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 38904 event pairs, 1264 based on Foata normal form. 20/6995 useless extension candidates. Maximal degree in co-relation 72179. Up to 6434 conditions per place. [2024-06-20 16:25:38,758 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 519 selfloop transitions, 154 changer transitions 0/676 dead transitions. [2024-06-20 16:25:38,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 676 transitions, 13349 flow [2024-06-20 16:25:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:25:38,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 16:25:38,759 INFO L175 Difference]: Start difference. First operand has 401 places, 655 transitions, 11573 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:25:38,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 676 transitions, 13349 flow [2024-06-20 16:25:42,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 676 transitions, 13055 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:42,158 INFO L231 Difference]: Finished difference. Result has 404 places, 655 transitions, 11599 flow [2024-06-20 16:25:42,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11279, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11599, PETRI_PLACES=404, PETRI_TRANSITIONS=655} [2024-06-20 16:25:42,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-20 16:25:42,158 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 655 transitions, 11599 flow [2024-06-20 16:25:42,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:42,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:42,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:42,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:25:42,159 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)] === [2024-06-20 16:25:42,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -251931284, now seen corresponding path program 4 times [2024-06-20 16:25:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:42,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274309910] [2024-06-20 16:25:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:42,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:43,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274309910] [2024-06-20 16:25:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274309910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:43,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229477420] [2024-06-20 16:25:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:43,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:43,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 655 transitions, 11599 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:43,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:43,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:43,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:45,238 INFO L124 PetriNetUnfolderBase]: 4677/7148 cut-off events. [2024-06-20 16:25:45,238 INFO L125 PetriNetUnfolderBase]: For 1106971/1106975 co-relation queries the response was YES. [2024-06-20 16:25:45,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73765 conditions, 7148 events. 4677/7148 cut-off events. For 1106971/1106975 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 40721 event pairs, 1215 based on Foata normal form. 8/7155 useless extension candidates. Maximal degree in co-relation 73581. Up to 6376 conditions per place. [2024-06-20 16:25:45,344 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 533 selfloop transitions, 140 changer transitions 0/712 dead transitions. [2024-06-20 16:25:45,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 712 transitions, 13507 flow [2024-06-20 16:25:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:25:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:25:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:25:45,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:25:45,345 INFO L175 Difference]: Start difference. First operand has 404 places, 655 transitions, 11599 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:25:45,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 712 transitions, 13507 flow [2024-06-20 16:25:50,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 712 transitions, 13231 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:25:50,087 INFO L231 Difference]: Finished difference. Result has 408 places, 678 transitions, 11929 flow [2024-06-20 16:25:50,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11323, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11929, PETRI_PLACES=408, PETRI_TRANSITIONS=678} [2024-06-20 16:25:50,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-20 16:25:50,088 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 678 transitions, 11929 flow [2024-06-20 16:25:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:50,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:50,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:50,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:25:50,088 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)] === [2024-06-20 16:25:50,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2046150358, now seen corresponding path program 2 times [2024-06-20 16:25:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109880382] [2024-06-20 16:25:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:51,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:51,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109880382] [2024-06-20 16:25:51,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109880382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:51,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:51,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49463174] [2024-06-20 16:25:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:51,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:51,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:25:51,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 678 transitions, 11929 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:51,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:51,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:25:51,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:53,199 INFO L124 PetriNetUnfolderBase]: 4804/7293 cut-off events. [2024-06-20 16:25:53,199 INFO L125 PetriNetUnfolderBase]: For 1126674/1126678 co-relation queries the response was YES. [2024-06-20 16:25:53,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75334 conditions, 7293 events. 4804/7293 cut-off events. For 1126674/1126678 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41184 event pairs, 1310 based on Foata normal form. 6/7298 useless extension candidates. Maximal degree in co-relation 75148. Up to 6650 conditions per place. [2024-06-20 16:25:53,305 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 530 selfloop transitions, 189 changer transitions 0/722 dead transitions. [2024-06-20 16:25:53,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 722 transitions, 14172 flow [2024-06-20 16:25:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:25:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:25:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-20 16:25:53,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-20 16:25:53,306 INFO L175 Difference]: Start difference. First operand has 408 places, 678 transitions, 11929 flow. Second operand 12 states and 209 transitions. [2024-06-20 16:25:53,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 722 transitions, 14172 flow [2024-06-20 16:25:58,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 722 transitions, 14000 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:58,953 INFO L231 Difference]: Finished difference. Result has 414 places, 690 transitions, 12311 flow [2024-06-20 16:25:58,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11757, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12311, PETRI_PLACES=414, PETRI_TRANSITIONS=690} [2024-06-20 16:25:58,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-20 16:25:58,953 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 690 transitions, 12311 flow [2024-06-20 16:25:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:58,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:58,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:58,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:25:58,954 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)] === [2024-06-20 16:25:58,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2046150668, now seen corresponding path program 5 times [2024-06-20 16:25:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228206404] [2024-06-20 16:25:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:59,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228206404] [2024-06-20 16:25:59,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228206404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:59,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:59,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511145265] [2024-06-20 16:25:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:00,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:00,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 690 transitions, 12311 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:00,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:00,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:02,297 INFO L124 PetriNetUnfolderBase]: 4728/7225 cut-off events. [2024-06-20 16:26:02,297 INFO L125 PetriNetUnfolderBase]: For 1162562/1162566 co-relation queries the response was YES. [2024-06-20 16:26:02,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75835 conditions, 7225 events. 4728/7225 cut-off events. For 1162562/1162566 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 41244 event pairs, 1241 based on Foata normal form. 8/7232 useless extension candidates. Maximal degree in co-relation 75647. Up to 6568 conditions per place. [2024-06-20 16:26:02,384 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 127 changer transitions 0/722 dead transitions. [2024-06-20 16:26:02,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 722 transitions, 13834 flow [2024-06-20 16:26:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:26:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:26:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-20 16:26:02,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:26:02,385 INFO L175 Difference]: Start difference. First operand has 414 places, 690 transitions, 12311 flow. Second operand 11 states and 198 transitions. [2024-06-20 16:26:02,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 722 transitions, 13834 flow [2024-06-20 16:26:06,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 722 transitions, 13561 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 16:26:06,463 INFO L231 Difference]: Finished difference. Result has 417 places, 693 transitions, 12358 flow [2024-06-20 16:26:06,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12038, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12358, PETRI_PLACES=417, PETRI_TRANSITIONS=693} [2024-06-20 16:26:06,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-20 16:26:06,463 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 693 transitions, 12358 flow [2024-06-20 16:26:06,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:06,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:06,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:06,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:26:06,464 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)] === [2024-06-20 16:26:06,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2037807886, now seen corresponding path program 2 times [2024-06-20 16:26:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436641490] [2024-06-20 16:26:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:07,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:07,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436641490] [2024-06-20 16:26:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436641490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:07,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197741635] [2024-06-20 16:26:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:07,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:07,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 693 transitions, 12358 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:07,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:07,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:07,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:09,603 INFO L124 PetriNetUnfolderBase]: 4976/7529 cut-off events. [2024-06-20 16:26:09,603 INFO L125 PetriNetUnfolderBase]: For 1246143/1246147 co-relation queries the response was YES. [2024-06-20 16:26:09,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79657 conditions, 7529 events. 4976/7529 cut-off events. For 1246143/1246147 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42578 event pairs, 1347 based on Foata normal form. 10/7538 useless extension candidates. Maximal degree in co-relation 79467. Up to 6680 conditions per place. [2024-06-20 16:26:09,708 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 564 selfloop transitions, 184 changer transitions 0/751 dead transitions. [2024-06-20 16:26:09,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 751 transitions, 15017 flow [2024-06-20 16:26:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:26:09,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-20 16:26:09,709 INFO L175 Difference]: Start difference. First operand has 417 places, 693 transitions, 12358 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:26:09,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 751 transitions, 15017 flow [2024-06-20 16:26:14,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 751 transitions, 14751 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 16:26:14,150 INFO L231 Difference]: Finished difference. Result has 420 places, 720 transitions, 13132 flow [2024-06-20 16:26:14,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12092, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13132, PETRI_PLACES=420, PETRI_TRANSITIONS=720} [2024-06-20 16:26:14,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-20 16:26:14,150 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 720 transitions, 13132 flow [2024-06-20 16:26:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:14,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:14,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:14,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:26:14,151 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)] === [2024-06-20 16:26:14,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -393691980, now seen corresponding path program 3 times [2024-06-20 16:26:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061971954] [2024-06-20 16:26:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:14,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:14,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061971954] [2024-06-20 16:26:14,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061971954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:14,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:14,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:14,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780869140] [2024-06-20 16:26:14,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:14,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:14,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:15,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:15,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 720 transitions, 13132 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:15,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:15,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:15,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:17,310 INFO L124 PetriNetUnfolderBase]: 5060/7648 cut-off events. [2024-06-20 16:26:17,310 INFO L125 PetriNetUnfolderBase]: For 1308066/1308084 co-relation queries the response was YES. [2024-06-20 16:26:17,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82840 conditions, 7648 events. 5060/7648 cut-off events. For 1308066/1308084 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43233 event pairs, 1318 based on Foata normal form. 24/7671 useless extension candidates. Maximal degree in co-relation 82647. Up to 6742 conditions per place. [2024-06-20 16:26:17,424 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 572 selfloop transitions, 187 changer transitions 0/762 dead transitions. [2024-06-20 16:26:17,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 762 transitions, 15664 flow [2024-06-20 16:26:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 16:26:17,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-20 16:26:17,425 INFO L175 Difference]: Start difference. First operand has 420 places, 720 transitions, 13132 flow. Second operand 10 states and 181 transitions. [2024-06-20 16:26:17,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 762 transitions, 15664 flow [2024-06-20 16:26:22,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 762 transitions, 15420 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:22,676 INFO L231 Difference]: Finished difference. Result has 426 places, 734 transitions, 13626 flow [2024-06-20 16:26:22,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12924, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13626, PETRI_PLACES=426, PETRI_TRANSITIONS=734} [2024-06-20 16:26:22,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-20 16:26:22,677 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 734 transitions, 13626 flow [2024-06-20 16:26:22,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:22,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:22,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:22,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:26:22,677 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)] === [2024-06-20 16:26:22,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:22,677 INFO L85 PathProgramCache]: Analyzing trace with hash 824277146, now seen corresponding path program 4 times [2024-06-20 16:26:22,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:22,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85484628] [2024-06-20 16:26:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:22,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:23,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85484628] [2024-06-20 16:26:23,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85484628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:23,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:23,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:23,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114139287] [2024-06-20 16:26:23,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:23,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:23,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:23,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:23,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:23,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:23,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 734 transitions, 13626 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:23,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:23,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:23,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:25,827 INFO L124 PetriNetUnfolderBase]: 5048/7633 cut-off events. [2024-06-20 16:26:25,827 INFO L125 PetriNetUnfolderBase]: For 1307195/1307213 co-relation queries the response was YES. [2024-06-20 16:26:25,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82732 conditions, 7633 events. 5048/7633 cut-off events. For 1307195/1307213 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43146 event pairs, 1314 based on Foata normal form. 24/7656 useless extension candidates. Maximal degree in co-relation 82537. Up to 6738 conditions per place. [2024-06-20 16:26:25,954 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 569 selfloop transitions, 188 changer transitions 0/760 dead transitions. [2024-06-20 16:26:25,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 760 transitions, 15800 flow [2024-06-20 16:26:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 16:26:25,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 16:26:25,955 INFO L175 Difference]: Start difference. First operand has 426 places, 734 transitions, 13626 flow. Second operand 10 states and 178 transitions. [2024-06-20 16:26:25,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 760 transitions, 15800 flow [2024-06-20 16:26:32,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 760 transitions, 15234 flow, removed 141 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:32,174 INFO L231 Difference]: Finished difference. Result has 430 places, 734 transitions, 13449 flow [2024-06-20 16:26:32,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13060, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13449, PETRI_PLACES=430, PETRI_TRANSITIONS=734} [2024-06-20 16:26:32,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-20 16:26:32,174 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 734 transitions, 13449 flow [2024-06-20 16:26:32,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:32,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:32,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:32,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:26:32,175 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)] === [2024-06-20 16:26:32,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1750931158, now seen corresponding path program 3 times [2024-06-20 16:26:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:32,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293609315] [2024-06-20 16:26:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:32,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:33,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293609315] [2024-06-20 16:26:33,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293609315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:33,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:33,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:33,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008963496] [2024-06-20 16:26:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:33,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:33,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:33,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:33,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 734 transitions, 13449 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:33,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:33,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:33,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:35,631 INFO L124 PetriNetUnfolderBase]: 5058/7647 cut-off events. [2024-06-20 16:26:35,632 INFO L125 PetriNetUnfolderBase]: For 1311661/1311679 co-relation queries the response was YES. [2024-06-20 16:26:35,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82430 conditions, 7647 events. 5058/7647 cut-off events. For 1311661/1311679 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43273 event pairs, 1317 based on Foata normal form. 20/7666 useless extension candidates. Maximal degree in co-relation 82234. Up to 7074 conditions per place. [2024-06-20 16:26:35,728 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 595 selfloop transitions, 163 changer transitions 0/761 dead transitions. [2024-06-20 16:26:35,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 761 transitions, 15675 flow [2024-06-20 16:26:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:26:35,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-20 16:26:35,729 INFO L175 Difference]: Start difference. First operand has 430 places, 734 transitions, 13449 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:26:35,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 761 transitions, 15675 flow [2024-06-20 16:26:42,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 761 transitions, 15308 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:26:42,644 INFO L231 Difference]: Finished difference. Result has 432 places, 738 transitions, 13473 flow [2024-06-20 16:26:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13082, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13473, PETRI_PLACES=432, PETRI_TRANSITIONS=738} [2024-06-20 16:26:42,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-20 16:26:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 738 transitions, 13473 flow [2024-06-20 16:26:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:42,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:42,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:42,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:26:42,645 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)] === [2024-06-20 16:26:42,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1750920928, now seen corresponding path program 4 times [2024-06-20 16:26:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:42,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381468368] [2024-06-20 16:26:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:42,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:43,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381468368] [2024-06-20 16:26:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381468368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:43,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:43,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:43,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998249438] [2024-06-20 16:26:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:43,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:43,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:43,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:43,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 738 transitions, 13473 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:43,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:43,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:43,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:45,862 INFO L124 PetriNetUnfolderBase]: 5068/7661 cut-off events. [2024-06-20 16:26:45,862 INFO L125 PetriNetUnfolderBase]: For 1337590/1337608 co-relation queries the response was YES. [2024-06-20 16:26:45,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82596 conditions, 7661 events. 5068/7661 cut-off events. For 1337590/1337608 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 43300 event pairs, 1317 based on Foata normal form. 20/7680 useless extension candidates. Maximal degree in co-relation 82399. Up to 7107 conditions per place. [2024-06-20 16:26:45,988 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 605 selfloop transitions, 156 changer transitions 0/764 dead transitions. [2024-06-20 16:26:45,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 764 transitions, 15525 flow [2024-06-20 16:26:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 16:26:45,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 16:26:45,989 INFO L175 Difference]: Start difference. First operand has 432 places, 738 transitions, 13473 flow. Second operand 10 states and 171 transitions. [2024-06-20 16:26:45,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 764 transitions, 15525 flow [2024-06-20 16:26:51,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 764 transitions, 15145 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 16:26:51,016 INFO L231 Difference]: Finished difference. Result has 434 places, 742 transitions, 13486 flow [2024-06-20 16:26:51,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13103, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13486, PETRI_PLACES=434, PETRI_TRANSITIONS=742} [2024-06-20 16:26:51,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-20 16:26:51,017 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 742 transitions, 13486 flow [2024-06-20 16:26:51,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:51,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:51,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:51,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:26:51,017 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)] === [2024-06-20 16:26:51,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1750574968, now seen corresponding path program 5 times [2024-06-20 16:26:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:51,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337008304] [2024-06-20 16:26:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:51,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:51,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337008304] [2024-06-20 16:26:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337008304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:51,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519505084] [2024-06-20 16:26:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:51,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:51,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:52,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:52,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 742 transitions, 13486 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:52,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:52,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:52,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:54,281 INFO L124 PetriNetUnfolderBase]: 5064/7656 cut-off events. [2024-06-20 16:26:54,281 INFO L125 PetriNetUnfolderBase]: For 1353432/1353450 co-relation queries the response was YES. [2024-06-20 16:26:54,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82559 conditions, 7656 events. 5064/7656 cut-off events. For 1353432/1353450 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 43310 event pairs, 1317 based on Foata normal form. 20/7675 useless extension candidates. Maximal degree in co-relation 82361. Up to 7101 conditions per place. [2024-06-20 16:26:54,409 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 604 selfloop transitions, 157 changer transitions 0/764 dead transitions. [2024-06-20 16:26:54,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 764 transitions, 15476 flow [2024-06-20 16:26:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:26:54,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:26:54,410 INFO L175 Difference]: Start difference. First operand has 434 places, 742 transitions, 13486 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:26:54,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 764 transitions, 15476 flow [2024-06-20 16:27:00,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 764 transitions, 15120 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 16:27:00,732 INFO L231 Difference]: Finished difference. Result has 437 places, 742 transitions, 13451 flow [2024-06-20 16:27:00,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13130, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13451, PETRI_PLACES=437, PETRI_TRANSITIONS=742} [2024-06-20 16:27:00,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-20 16:27:00,732 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 742 transitions, 13451 flow [2024-06-20 16:27:00,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:00,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:00,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:00,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:27:00,733 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)] === [2024-06-20 16:27:00,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:00,733 INFO L85 PathProgramCache]: Analyzing trace with hash 823908184, now seen corresponding path program 6 times [2024-06-20 16:27:00,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:00,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711971] [2024-06-20 16:27:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:00,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:01,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:01,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711971] [2024-06-20 16:27:01,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:01,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:01,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:27:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71449847] [2024-06-20 16:27:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:27:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:27:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:27:01,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:01,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 742 transitions, 13451 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:01,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:01,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:01,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:04,227 INFO L124 PetriNetUnfolderBase]: 4954/7542 cut-off events. [2024-06-20 16:27:04,227 INFO L125 PetriNetUnfolderBase]: For 1373496/1373514 co-relation queries the response was YES. [2024-06-20 16:27:04,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81805 conditions, 7542 events. 4954/7542 cut-off events. For 1373496/1373514 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 43112 event pairs, 1261 based on Foata normal form. 22/7563 useless extension candidates. Maximal degree in co-relation 81606. Up to 6940 conditions per place. [2024-06-20 16:27:04,342 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 615 selfloop transitions, 105 changer transitions 0/764 dead transitions. [2024-06-20 16:27:04,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 764 transitions, 14981 flow [2024-06-20 16:27:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:27:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:27:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-20 16:27:04,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:27:04,344 INFO L175 Difference]: Start difference. First operand has 437 places, 742 transitions, 13451 flow. Second operand 10 states and 174 transitions. [2024-06-20 16:27:04,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 764 transitions, 14981 flow [2024-06-20 16:27:09,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 764 transitions, 14628 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 16:27:09,399 INFO L231 Difference]: Finished difference. Result has 439 places, 743 transitions, 13328 flow [2024-06-20 16:27:09,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13098, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13328, PETRI_PLACES=439, PETRI_TRANSITIONS=743} [2024-06-20 16:27:09,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-20 16:27:09,400 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 743 transitions, 13328 flow [2024-06-20 16:27:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:09,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:09,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:27:09,400 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)] === [2024-06-20 16:27:09,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1750920556, now seen corresponding path program 5 times [2024-06-20 16:27:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118005666] [2024-06-20 16:27:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:10,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:10,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118005666] [2024-06-20 16:27:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118005666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:10,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:27:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161462446] [2024-06-20 16:27:10,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:10,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:27:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:27:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:27:10,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:10,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 743 transitions, 13328 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:10,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:10,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:10,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:12,686 INFO L124 PetriNetUnfolderBase]: 5036/7618 cut-off events. [2024-06-20 16:27:12,686 INFO L125 PetriNetUnfolderBase]: For 1373392/1373410 co-relation queries the response was YES. [2024-06-20 16:27:12,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81560 conditions, 7618 events. 5036/7618 cut-off events. For 1373392/1373410 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 43108 event pairs, 1310 based on Foata normal form. 24/7641 useless extension candidates. Maximal degree in co-relation 81360. Up to 6736 conditions per place. [2024-06-20 16:27:12,805 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 579 selfloop transitions, 188 changer transitions 0/770 dead transitions. [2024-06-20 16:27:12,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 770 transitions, 15362 flow [2024-06-20 16:27:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:27:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:27:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 16:27:12,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-20 16:27:12,806 INFO L175 Difference]: Start difference. First operand has 439 places, 743 transitions, 13328 flow. Second operand 10 states and 181 transitions. [2024-06-20 16:27:12,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 770 transitions, 15362 flow [2024-06-20 16:27:18,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 770 transitions, 15126 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 16:27:18,137 INFO L231 Difference]: Finished difference. Result has 442 places, 743 transitions, 13478 flow [2024-06-20 16:27:18,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13092, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13478, PETRI_PLACES=442, PETRI_TRANSITIONS=743} [2024-06-20 16:27:18,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-20 16:27:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 743 transitions, 13478 flow [2024-06-20 16:27:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:18,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:18,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:27:18,138 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)] === [2024-06-20 16:27:18,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1920908464, now seen corresponding path program 7 times [2024-06-20 16:27:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:18,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252873176] [2024-06-20 16:27:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:19,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:19,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252873176] [2024-06-20 16:27:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252873176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:19,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:27:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613246933] [2024-06-20 16:27:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:27:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:27:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:27:19,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:19,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 743 transitions, 13478 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:19,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:19,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:19,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:21,308 INFO L124 PetriNetUnfolderBase]: 4956/7540 cut-off events. [2024-06-20 16:27:21,309 INFO L125 PetriNetUnfolderBase]: For 1411502/1411537 co-relation queries the response was YES. [2024-06-20 16:27:21,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82097 conditions, 7540 events. 4956/7540 cut-off events. For 1411502/1411537 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 42984 event pairs, 1011 based on Foata normal form. 32/7564 useless extension candidates. Maximal degree in co-relation 81896. Up to 6478 conditions per place. [2024-06-20 16:27:21,427 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 530 selfloop transitions, 205 changer transitions 0/779 dead transitions. [2024-06-20 16:27:21,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 779 transitions, 15354 flow [2024-06-20 16:27:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:27:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:27:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:27:21,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 16:27:21,428 INFO L175 Difference]: Start difference. First operand has 442 places, 743 transitions, 13478 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:27:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 779 transitions, 15354 flow [2024-06-20 16:27:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 779 transitions, 14972 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 16:27:27,297 INFO L231 Difference]: Finished difference. Result has 443 places, 747 transitions, 13646 flow [2024-06-20 16:27:27,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13096, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13646, PETRI_PLACES=443, PETRI_TRANSITIONS=747} [2024-06-20 16:27:27,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-20 16:27:27,298 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 747 transitions, 13646 flow [2024-06-20 16:27:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:27,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:27:27,298 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)] === [2024-06-20 16:27:27,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 855633381, now seen corresponding path program 1 times [2024-06-20 16:27:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:27,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585242244] [2024-06-20 16:27:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:28,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585242244] [2024-06-20 16:27:28,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585242244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:28,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:28,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:27:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399732946] [2024-06-20 16:27:28,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:28,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:27:28,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:28,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:27:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:27:28,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:28,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 747 transitions, 13646 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:28,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:28,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:28,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:30,836 INFO L124 PetriNetUnfolderBase]: 5114/7726 cut-off events. [2024-06-20 16:27:30,836 INFO L125 PetriNetUnfolderBase]: For 1447058/1447062 co-relation queries the response was YES. [2024-06-20 16:27:30,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84127 conditions, 7726 events. 5114/7726 cut-off events. For 1447058/1447062 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43802 event pairs, 1320 based on Foata normal form. 10/7735 useless extension candidates. Maximal degree in co-relation 83924. Up to 6874 conditions per place. [2024-06-20 16:27:30,961 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 565 selfloop transitions, 235 changer transitions 0/803 dead transitions. [2024-06-20 16:27:30,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 803 transitions, 16155 flow [2024-06-20 16:27:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:27:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:27:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-20 16:27:30,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-20 16:27:30,962 INFO L175 Difference]: Start difference. First operand has 443 places, 747 transitions, 13646 flow. Second operand 11 states and 199 transitions. [2024-06-20 16:27:30,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 803 transitions, 16155 flow [2024-06-20 16:27:36,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 803 transitions, 15746 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 16:27:36,225 INFO L231 Difference]: Finished difference. Result has 450 places, 770 transitions, 14389 flow [2024-06-20 16:27:36,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13249, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14389, PETRI_PLACES=450, PETRI_TRANSITIONS=770} [2024-06-20 16:27:36,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-20 16:27:36,226 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 770 transitions, 14389 flow [2024-06-20 16:27:36,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:36,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:36,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:36,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:27:36,226 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)] === [2024-06-20 16:27:36,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash 271021592, now seen corresponding path program 8 times [2024-06-20 16:27:36,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:36,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512816152] [2024-06-20 16:27:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:37,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:37,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512816152] [2024-06-20 16:27:37,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512816152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:37,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:37,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:27:37,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984110644] [2024-06-20 16:27:37,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:37,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:27:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:27:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:27:37,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:37,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 770 transitions, 14389 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:37,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:37,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:37,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:40,037 INFO L124 PetriNetUnfolderBase]: 5030/7654 cut-off events. [2024-06-20 16:27:40,037 INFO L125 PetriNetUnfolderBase]: For 1400779/1400784 co-relation queries the response was YES. [2024-06-20 16:27:40,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85370 conditions, 7654 events. 5030/7654 cut-off events. For 1400779/1400784 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43886 event pairs, 1228 based on Foata normal form. 8/7658 useless extension candidates. Maximal degree in co-relation 85164. Up to 6896 conditions per place. [2024-06-20 16:27:40,142 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 586 selfloop transitions, 171 changer transitions 0/801 dead transitions. [2024-06-20 16:27:40,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 801 transitions, 16076 flow [2024-06-20 16:27:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:27:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:27:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 16:27:40,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:27:40,143 INFO L175 Difference]: Start difference. First operand has 450 places, 770 transitions, 14389 flow. Second operand 10 states and 182 transitions. [2024-06-20 16:27:40,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 801 transitions, 16076 flow [2024-06-20 16:27:44,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 801 transitions, 15911 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 16:27:44,750 INFO L231 Difference]: Finished difference. Result has 455 places, 773 transitions, 14643 flow [2024-06-20 16:27:44,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14224, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14643, PETRI_PLACES=455, PETRI_TRANSITIONS=773} [2024-06-20 16:27:44,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-20 16:27:44,751 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 773 transitions, 14643 flow [2024-06-20 16:27:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:44,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:44,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:27:44,751 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)] === [2024-06-20 16:27:44,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 993849447, now seen corresponding path program 2 times [2024-06-20 16:27:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:44,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539298348] [2024-06-20 16:27:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539298348] [2024-06-20 16:27:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539298348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:45,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:27:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010781401] [2024-06-20 16:27:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:27:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:27:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:27:45,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:45,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 773 transitions, 14643 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:45,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:45,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:48,217 INFO L124 PetriNetUnfolderBase]: 5206/7860 cut-off events. [2024-06-20 16:27:48,217 INFO L125 PetriNetUnfolderBase]: For 1419845/1419849 co-relation queries the response was YES. [2024-06-20 16:27:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87422 conditions, 7860 events. 5206/7860 cut-off events. For 1419845/1419849 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 44589 event pairs, 1334 based on Foata normal form. 6/7865 useless extension candidates. Maximal degree in co-relation 87213. Up to 6953 conditions per place. [2024-06-20 16:27:48,347 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 608 selfloop transitions, 231 changer transitions 0/842 dead transitions. [2024-06-20 16:27:48,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 842 transitions, 17572 flow [2024-06-20 16:27:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:27:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:27:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-20 16:27:48,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-20 16:27:48,348 INFO L175 Difference]: Start difference. First operand has 455 places, 773 transitions, 14643 flow. Second operand 11 states and 201 transitions. [2024-06-20 16:27:48,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 842 transitions, 17572 flow [2024-06-20 16:27:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 842 transitions, 17232 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:27:53,542 INFO L231 Difference]: Finished difference. Result has 464 places, 809 transitions, 15528 flow [2024-06-20 16:27:53,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14317, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15528, PETRI_PLACES=464, PETRI_TRANSITIONS=809} [2024-06-20 16:27:53,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-20 16:27:53,543 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 809 transitions, 15528 flow [2024-06-20 16:27:53,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:53,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:53,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:27:53,544 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)] === [2024-06-20 16:27:53,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1167463582, now seen corresponding path program 6 times [2024-06-20 16:27:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:53,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324075049] [2024-06-20 16:27:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324075049] [2024-06-20 16:27:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324075049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:27:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926101510] [2024-06-20 16:27:54,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:54,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:27:54,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:54,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:27:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:27:54,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:54,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 809 transitions, 15528 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:54,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:54,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:54,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:56,980 INFO L124 PetriNetUnfolderBase]: 5246/7916 cut-off events. [2024-06-20 16:27:56,980 INFO L125 PetriNetUnfolderBase]: For 1454487/1454491 co-relation queries the response was YES. [2024-06-20 16:27:57,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89361 conditions, 7916 events. 5246/7916 cut-off events. For 1454487/1454491 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45011 event pairs, 1301 based on Foata normal form. 6/7921 useless extension candidates. Maximal degree in co-relation 89146. Up to 7114 conditions per place. [2024-06-20 16:27:57,110 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 276 changer transitions 0/853 dead transitions. [2024-06-20 16:27:57,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 853 transitions, 17966 flow [2024-06-20 16:27:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:27:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:27:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:27:57,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:27:57,111 INFO L175 Difference]: Start difference. First operand has 464 places, 809 transitions, 15528 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:27:57,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 853 transitions, 17966 flow [2024-06-20 16:28:02,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 853 transitions, 17686 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:02,458 INFO L231 Difference]: Finished difference. Result has 470 places, 825 transitions, 16060 flow [2024-06-20 16:28:02,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15248, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16060, PETRI_PLACES=470, PETRI_TRANSITIONS=825} [2024-06-20 16:28:02,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-20 16:28:02,459 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 825 transitions, 16060 flow [2024-06-20 16:28:02,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:02,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:02,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:28:02,460 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)] === [2024-06-20 16:28:02,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1175795452, now seen corresponding path program 7 times [2024-06-20 16:28:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459323929] [2024-06-20 16:28:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:03,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459323929] [2024-06-20 16:28:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459323929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:03,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:03,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:28:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335491913] [2024-06-20 16:28:03,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:28:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:28:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:28:03,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:03,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 825 transitions, 16060 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:03,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:03,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:03,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:06,076 INFO L124 PetriNetUnfolderBase]: 5256/7926 cut-off events. [2024-06-20 16:28:06,076 INFO L125 PetriNetUnfolderBase]: For 1480945/1480949 co-relation queries the response was YES. [2024-06-20 16:28:06,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90360 conditions, 7926 events. 5256/7926 cut-off events. For 1480945/1480949 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44974 event pairs, 1321 based on Foata normal form. 6/7931 useless extension candidates. Maximal degree in co-relation 90143. Up to 7316 conditions per place. [2024-06-20 16:28:06,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 630 selfloop transitions, 219 changer transitions 0/852 dead transitions. [2024-06-20 16:28:06,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 852 transitions, 18132 flow [2024-06-20 16:28:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:28:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:28:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:28:06,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:28:06,227 INFO L175 Difference]: Start difference. First operand has 470 places, 825 transitions, 16060 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:28:06,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 852 transitions, 18132 flow [2024-06-20 16:28:11,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 852 transitions, 17725 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:11,687 INFO L231 Difference]: Finished difference. Result has 475 places, 829 transitions, 16201 flow [2024-06-20 16:28:11,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15667, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16201, PETRI_PLACES=475, PETRI_TRANSITIONS=829} [2024-06-20 16:28:11,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-20 16:28:11,687 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 829 transitions, 16201 flow [2024-06-20 16:28:11,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:11,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:11,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:28:11,688 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)] === [2024-06-20 16:28:11,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -600505268, now seen corresponding path program 6 times [2024-06-20 16:28:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709555303] [2024-06-20 16:28:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:12,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709555303] [2024-06-20 16:28:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709555303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:12,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:12,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:28:12,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131158920] [2024-06-20 16:28:12,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:12,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:28:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:28:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:28:12,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:12,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 829 transitions, 16201 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:12,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:12,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:12,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:15,353 INFO L124 PetriNetUnfolderBase]: 5326/8023 cut-off events. [2024-06-20 16:28:15,354 INFO L125 PetriNetUnfolderBase]: For 1562547/1562551 co-relation queries the response was YES. [2024-06-20 16:28:15,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92195 conditions, 8023 events. 5326/8023 cut-off events. For 1562547/1562551 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 45546 event pairs, 1330 based on Foata normal form. 10/8032 useless extension candidates. Maximal degree in co-relation 91978. Up to 7015 conditions per place. [2024-06-20 16:28:15,475 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 606 selfloop transitions, 263 changer transitions 0/872 dead transitions. [2024-06-20 16:28:15,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 872 transitions, 18914 flow [2024-06-20 16:28:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:28:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:28:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:28:15,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 16:28:15,477 INFO L175 Difference]: Start difference. First operand has 475 places, 829 transitions, 16201 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:28:15,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 872 transitions, 18914 flow [2024-06-20 16:28:21,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 872 transitions, 18408 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-20 16:28:21,301 INFO L231 Difference]: Finished difference. Result has 475 places, 844 transitions, 16836 flow [2024-06-20 16:28:21,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15695, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16836, PETRI_PLACES=475, PETRI_TRANSITIONS=844} [2024-06-20 16:28:21,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-20 16:28:21,302 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 844 transitions, 16836 flow [2024-06-20 16:28:21,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:21,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:21,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:21,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:28:21,302 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)] === [2024-06-20 16:28:21,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:21,303 INFO L85 PathProgramCache]: Analyzing trace with hash -490641888, now seen corresponding path program 4 times [2024-06-20 16:28:21,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:21,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175414413] [2024-06-20 16:28:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:21,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175414413] [2024-06-20 16:28:22,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175414413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:22,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:22,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903826178] [2024-06-20 16:28:22,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:22,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:22,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:22,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 844 transitions, 16836 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:22,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:22,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:22,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:24,622 INFO L124 PetriNetUnfolderBase]: 5262/7979 cut-off events. [2024-06-20 16:28:24,622 INFO L125 PetriNetUnfolderBase]: For 1616537/1616555 co-relation queries the response was YES. [2024-06-20 16:28:24,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93582 conditions, 7979 events. 5262/7979 cut-off events. For 1616537/1616555 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45881 event pairs, 1225 based on Foata normal form. 24/8002 useless extension candidates. Maximal degree in co-relation 93365. Up to 7048 conditions per place. [2024-06-20 16:28:24,757 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 689 selfloop transitions, 144 changer transitions 0/882 dead transitions. [2024-06-20 16:28:24,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 882 transitions, 18928 flow [2024-06-20 16:28:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:28:24,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:28:24,759 INFO L175 Difference]: Start difference. First operand has 475 places, 844 transitions, 16836 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:28:24,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 882 transitions, 18928 flow [2024-06-20 16:28:30,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 882 transitions, 18679 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:30,155 INFO L231 Difference]: Finished difference. Result has 478 places, 853 transitions, 17115 flow [2024-06-20 16:28:30,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16587, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17115, PETRI_PLACES=478, PETRI_TRANSITIONS=853} [2024-06-20 16:28:30,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-20 16:28:30,156 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 853 transitions, 17115 flow [2024-06-20 16:28:30,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:30,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:30,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:30,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:28:30,156 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)] === [2024-06-20 16:28:30,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -490637052, now seen corresponding path program 4 times [2024-06-20 16:28:30,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:30,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105697467] [2024-06-20 16:28:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:30,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:30,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105697467] [2024-06-20 16:28:30,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105697467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:30,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:30,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:30,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157951367] [2024-06-20 16:28:30,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:30,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:30,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:31,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:31,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 853 transitions, 17115 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:31,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:31,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:31,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:33,416 INFO L124 PetriNetUnfolderBase]: 5402/8133 cut-off events. [2024-06-20 16:28:33,416 INFO L125 PetriNetUnfolderBase]: For 1579607/1579625 co-relation queries the response was YES. [2024-06-20 16:28:33,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95364 conditions, 8133 events. 5402/8133 cut-off events. For 1579607/1579625 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 46311 event pairs, 1348 based on Foata normal form. 22/8154 useless extension candidates. Maximal degree in co-relation 95146. Up to 7562 conditions per place. [2024-06-20 16:28:33,563 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 696 selfloop transitions, 191 changer transitions 0/890 dead transitions. [2024-06-20 16:28:33,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 890 transitions, 19863 flow [2024-06-20 16:28:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:28:33,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:28:33,564 INFO L175 Difference]: Start difference. First operand has 478 places, 853 transitions, 17115 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:28:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 890 transitions, 19863 flow [2024-06-20 16:28:39,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 890 transitions, 19313 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-20 16:28:39,573 INFO L231 Difference]: Finished difference. Result has 479 places, 869 transitions, 17482 flow [2024-06-20 16:28:39,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16565, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17482, PETRI_PLACES=479, PETRI_TRANSITIONS=869} [2024-06-20 16:28:39,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-20 16:28:39,574 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 869 transitions, 17482 flow [2024-06-20 16:28:39,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:39,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:39,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:39,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:28:39,575 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)] === [2024-06-20 16:28:39,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:39,575 INFO L85 PathProgramCache]: Analyzing trace with hash 389232404, now seen corresponding path program 5 times [2024-06-20 16:28:39,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:39,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526251011] [2024-06-20 16:28:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:39,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526251011] [2024-06-20 16:28:40,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526251011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:40,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:40,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:40,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293484686] [2024-06-20 16:28:40,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:40,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:40,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:40,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:40,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 869 transitions, 17482 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:40,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:40,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:40,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:43,213 INFO L124 PetriNetUnfolderBase]: 5382/8147 cut-off events. [2024-06-20 16:28:43,213 INFO L125 PetriNetUnfolderBase]: For 1667285/1667303 co-relation queries the response was YES. [2024-06-20 16:28:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96837 conditions, 8147 events. 5382/8147 cut-off events. For 1667285/1667303 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46893 event pairs, 1249 based on Foata normal form. 24/8170 useless extension candidates. Maximal degree in co-relation 96617. Up to 6815 conditions per place. [2024-06-20 16:28:43,329 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 667 selfloop transitions, 198 changer transitions 0/919 dead transitions. [2024-06-20 16:28:43,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 919 transitions, 20356 flow [2024-06-20 16:28:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:28:43,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:28:43,330 INFO L175 Difference]: Start difference. First operand has 479 places, 869 transitions, 17482 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:28:43,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 919 transitions, 20356 flow [2024-06-20 16:28:49,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 919 transitions, 20116 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:28:49,460 INFO L231 Difference]: Finished difference. Result has 482 places, 887 transitions, 18194 flow [2024-06-20 16:28:49,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17246, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18194, PETRI_PLACES=482, PETRI_TRANSITIONS=887} [2024-06-20 16:28:49,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-20 16:28:49,461 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 887 transitions, 18194 flow [2024-06-20 16:28:49,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:49,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:49,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:49,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:28:49,462 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)] === [2024-06-20 16:28:49,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1463042940, now seen corresponding path program 5 times [2024-06-20 16:28:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584997193] [2024-06-20 16:28:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:50,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:50,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584997193] [2024-06-20 16:28:50,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584997193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:50,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:50,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209493815] [2024-06-20 16:28:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:50,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:50,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:50,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 887 transitions, 18194 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:50,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:50,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:50,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:52,679 INFO L124 PetriNetUnfolderBase]: 5500/8267 cut-off events. [2024-06-20 16:28:52,680 INFO L125 PetriNetUnfolderBase]: For 1637583/1637601 co-relation queries the response was YES. [2024-06-20 16:28:52,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98716 conditions, 8267 events. 5500/8267 cut-off events. For 1637583/1637601 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 47001 event pairs, 1327 based on Foata normal form. 20/8286 useless extension candidates. Maximal degree in co-relation 98495. Up to 7694 conditions per place. [2024-06-20 16:28:52,819 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 727 selfloop transitions, 178 changer transitions 0/908 dead transitions. [2024-06-20 16:28:52,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 908 transitions, 20597 flow [2024-06-20 16:28:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:28:52,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:28:52,820 INFO L175 Difference]: Start difference. First operand has 482 places, 887 transitions, 18194 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:28:52,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 908 transitions, 20597 flow [2024-06-20 16:28:59,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 908 transitions, 20338 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:59,610 INFO L231 Difference]: Finished difference. Result has 487 places, 891 transitions, 18424 flow [2024-06-20 16:28:59,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17935, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18424, PETRI_PLACES=487, PETRI_TRANSITIONS=891} [2024-06-20 16:28:59,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-20 16:28:59,611 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 891 transitions, 18424 flow [2024-06-20 16:28:59,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:59,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:59,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:28:59,611 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)] === [2024-06-20 16:28:59,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -313505718, now seen corresponding path program 6 times [2024-06-20 16:28:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:59,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402016568] [2024-06-20 16:28:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:59,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:00,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402016568] [2024-06-20 16:29:00,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402016568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:00,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:00,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180556171] [2024-06-20 16:29:00,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:00,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:00,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:00,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 891 transitions, 18424 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:00,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:00,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:00,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:03,161 INFO L124 PetriNetUnfolderBase]: 5448/8233 cut-off events. [2024-06-20 16:29:03,161 INFO L125 PetriNetUnfolderBase]: For 1706095/1706113 co-relation queries the response was YES. [2024-06-20 16:29:03,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99785 conditions, 8233 events. 5448/8233 cut-off events. For 1706095/1706113 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 47197 event pairs, 1281 based on Foata normal form. 20/8252 useless extension candidates. Maximal degree in co-relation 99562. Up to 6867 conditions per place. [2024-06-20 16:29:03,305 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 651 selfloop transitions, 220 changer transitions 0/926 dead transitions. [2024-06-20 16:29:03,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 926 transitions, 21066 flow [2024-06-20 16:29:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:29:03,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:29:03,306 INFO L175 Difference]: Start difference. First operand has 487 places, 891 transitions, 18424 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:29:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 926 transitions, 21066 flow [2024-06-20 16:29:10,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 926 transitions, 20764 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:10,249 INFO L231 Difference]: Finished difference. Result has 489 places, 902 transitions, 18872 flow [2024-06-20 16:29:10,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18126, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18872, PETRI_PLACES=489, PETRI_TRANSITIONS=902} [2024-06-20 16:29:10,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-20 16:29:10,249 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 902 transitions, 18872 flow [2024-06-20 16:29:10,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:10,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:10,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:10,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:29:10,250 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)] === [2024-06-20 16:29:10,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash -313505532, now seen corresponding path program 6 times [2024-06-20 16:29:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750429631] [2024-06-20 16:29:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750429631] [2024-06-20 16:29:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750429631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:11,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:11,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055214953] [2024-06-20 16:29:11,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:11,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:11,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:11,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:29:11,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 902 transitions, 18872 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:11,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:11,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:29:11,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:14,122 INFO L124 PetriNetUnfolderBase]: 5546/8331 cut-off events. [2024-06-20 16:29:14,123 INFO L125 PetriNetUnfolderBase]: For 1679936/1679954 co-relation queries the response was YES. [2024-06-20 16:29:14,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100385 conditions, 8331 events. 5546/8331 cut-off events. For 1679936/1679954 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 47390 event pairs, 1335 based on Foata normal form. 20/8350 useless extension candidates. Maximal degree in co-relation 100162. Up to 7761 conditions per place. [2024-06-20 16:29:14,250 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 739 selfloop transitions, 177 changer transitions 0/919 dead transitions. [2024-06-20 16:29:14,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 919 transitions, 21190 flow [2024-06-20 16:29:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:29:14,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:29:14,251 INFO L175 Difference]: Start difference. First operand has 489 places, 902 transitions, 18872 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:29:14,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 919 transitions, 21190 flow [2024-06-20 16:29:20,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 919 transitions, 20850 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:20,789 INFO L231 Difference]: Finished difference. Result has 491 places, 902 transitions, 18902 flow [2024-06-20 16:29:20,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18536, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18902, PETRI_PLACES=491, PETRI_TRANSITIONS=902} [2024-06-20 16:29:20,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-20 16:29:20,790 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 902 transitions, 18902 flow [2024-06-20 16:29:20,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:20,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:20,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:29:20,790 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)] === [2024-06-20 16:29:20,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash 566597292, now seen corresponding path program 8 times [2024-06-20 16:29:20,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:20,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733225267] [2024-06-20 16:29:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733225267] [2024-06-20 16:29:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733225267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:21,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:21,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219024600] [2024-06-20 16:29:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:21,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:21,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:29:21,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 902 transitions, 18902 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:21,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:21,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:29:21,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:24,846 INFO L124 PetriNetUnfolderBase]: 5558/8348 cut-off events. [2024-06-20 16:29:24,846 INFO L125 PetriNetUnfolderBase]: For 1683239/1683257 co-relation queries the response was YES. [2024-06-20 16:29:24,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100196 conditions, 8348 events. 5558/8348 cut-off events. For 1683239/1683257 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 47488 event pairs, 1333 based on Foata normal form. 20/8367 useless extension candidates. Maximal degree in co-relation 99973. Up to 7764 conditions per place. [2024-06-20 16:29:24,971 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 734 selfloop transitions, 187 changer transitions 0/924 dead transitions. [2024-06-20 16:29:24,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 924 transitions, 21302 flow [2024-06-20 16:29:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:29:24,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 16:29:24,972 INFO L175 Difference]: Start difference. First operand has 491 places, 902 transitions, 18902 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:29:24,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 924 transitions, 21302 flow [2024-06-20 16:29:32,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 924 transitions, 21019 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:32,097 INFO L231 Difference]: Finished difference. Result has 494 places, 906 transitions, 19087 flow [2024-06-20 16:29:32,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18623, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19087, PETRI_PLACES=494, PETRI_TRANSITIONS=906} [2024-06-20 16:29:32,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-20 16:29:32,097 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 906 transitions, 19087 flow [2024-06-20 16:29:32,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:32,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:32,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:32,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:29:32,098 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)] === [2024-06-20 16:29:32,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:32,098 INFO L85 PathProgramCache]: Analyzing trace with hash -313271978, now seen corresponding path program 7 times [2024-06-20 16:29:32,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:32,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288198578] [2024-06-20 16:29:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:32,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:33,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288198578] [2024-06-20 16:29:33,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288198578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:33,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:33,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070675062] [2024-06-20 16:29:33,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:33,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:33,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:29:33,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 906 transitions, 19087 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:33,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:33,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:29:33,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:36,157 INFO L124 PetriNetUnfolderBase]: 5738/8597 cut-off events. [2024-06-20 16:29:36,157 INFO L125 PetriNetUnfolderBase]: For 1816514/1816532 co-relation queries the response was YES. [2024-06-20 16:29:36,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105035 conditions, 8597 events. 5738/8597 cut-off events. For 1816514/1816532 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 49002 event pairs, 1340 based on Foata normal form. 24/8620 useless extension candidates. Maximal degree in co-relation 104812. Up to 7428 conditions per place. [2024-06-20 16:29:36,278 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 707 selfloop transitions, 254 changer transitions 0/964 dead transitions. [2024-06-20 16:29:36,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 964 transitions, 22615 flow [2024-06-20 16:29:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:29:36,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:29:36,279 INFO L175 Difference]: Start difference. First operand has 494 places, 906 transitions, 19087 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:29:36,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 964 transitions, 22615 flow [2024-06-20 16:29:43,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 964 transitions, 22196 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 16:29:43,437 INFO L231 Difference]: Finished difference. Result has 497 places, 932 transitions, 20078 flow [2024-06-20 16:29:43,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18674, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20078, PETRI_PLACES=497, PETRI_TRANSITIONS=932} [2024-06-20 16:29:43,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-20 16:29:43,438 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 932 transitions, 20078 flow [2024-06-20 16:29:43,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:43,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:43,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:29:43,439 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)] === [2024-06-20 16:29:43,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:43,439 INFO L85 PathProgramCache]: Analyzing trace with hash -313259888, now seen corresponding path program 8 times [2024-06-20 16:29:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:43,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726013381] [2024-06-20 16:29:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:44,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:44,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726013381] [2024-06-20 16:29:44,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726013381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:44,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:44,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:44,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883819588] [2024-06-20 16:29:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:44,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:29:44,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 932 transitions, 20078 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:44,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:44,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:29:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:47,543 INFO L124 PetriNetUnfolderBase]: 5726/8582 cut-off events. [2024-06-20 16:29:47,543 INFO L125 PetriNetUnfolderBase]: For 1787559/1787577 co-relation queries the response was YES. [2024-06-20 16:29:47,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105136 conditions, 8582 events. 5726/8582 cut-off events. For 1787559/1787577 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 48924 event pairs, 1340 based on Foata normal form. 24/8605 useless extension candidates. Maximal degree in co-relation 104911. Up to 7424 conditions per place. [2024-06-20 16:29:47,666 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 704 selfloop transitions, 254 changer transitions 0/961 dead transitions. [2024-06-20 16:29:47,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 961 transitions, 22870 flow [2024-06-20 16:29:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:29:47,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:29:47,667 INFO L175 Difference]: Start difference. First operand has 497 places, 932 transitions, 20078 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:29:47,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 961 transitions, 22870 flow [2024-06-20 16:29:54,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 961 transitions, 22347 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:54,704 INFO L231 Difference]: Finished difference. Result has 501 places, 932 transitions, 20093 flow [2024-06-20 16:29:54,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19561, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20093, PETRI_PLACES=501, PETRI_TRANSITIONS=932} [2024-06-20 16:29:54,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-20 16:29:54,705 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 932 transitions, 20093 flow [2024-06-20 16:29:54,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:54,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:54,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:54,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:29:54,705 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)] === [2024-06-20 16:29:54,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1462682782, now seen corresponding path program 9 times [2024-06-20 16:29:54,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:54,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476528325] [2024-06-20 16:29:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:54,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:55,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476528325] [2024-06-20 16:29:55,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476528325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:55,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:55,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398972197] [2024-06-20 16:29:55,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:55,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:55,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:29:55,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 932 transitions, 20093 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:55,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:55,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:29:55,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:58,913 INFO L124 PetriNetUnfolderBase]: 5752/8618 cut-off events. [2024-06-20 16:29:58,913 INFO L125 PetriNetUnfolderBase]: For 1776936/1776954 co-relation queries the response was YES. [2024-06-20 16:29:58,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105253 conditions, 8618 events. 5752/8618 cut-off events. For 1776936/1776954 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 49135 event pairs, 1345 based on Foata normal form. 20/8637 useless extension candidates. Maximal degree in co-relation 105028. Up to 7996 conditions per place. [2024-06-20 16:29:59,035 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 747 selfloop transitions, 209 changer transitions 0/959 dead transitions. [2024-06-20 16:29:59,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 959 transitions, 22861 flow [2024-06-20 16:29:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:29:59,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 16:29:59,036 INFO L175 Difference]: Start difference. First operand has 501 places, 932 transitions, 20093 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:29:59,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 959 transitions, 22861 flow [2024-06-20 16:30:05,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 959 transitions, 22448 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:05,812 INFO L231 Difference]: Finished difference. Result has 503 places, 940 transitions, 20280 flow [2024-06-20 16:30:05,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19686, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20280, PETRI_PLACES=503, PETRI_TRANSITIONS=940} [2024-06-20 16:30:05,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-20 16:30:05,813 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 940 transitions, 20280 flow [2024-06-20 16:30:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:30:05,814 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)] === [2024-06-20 16:30:05,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash -313628850, now seen corresponding path program 9 times [2024-06-20 16:30:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614230089] [2024-06-20 16:30:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:06,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:06,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614230089] [2024-06-20 16:30:06,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614230089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:06,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:06,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:06,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360575803] [2024-06-20 16:30:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:07,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 940 transitions, 20280 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:07,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:10,011 INFO L124 PetriNetUnfolderBase]: 5658/8532 cut-off events. [2024-06-20 16:30:10,011 INFO L125 PetriNetUnfolderBase]: For 1798281/1798299 co-relation queries the response was YES. [2024-06-20 16:30:10,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104595 conditions, 8532 events. 5658/8532 cut-off events. For 1798281/1798299 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49171 event pairs, 1290 based on Foata normal form. 22/8553 useless extension candidates. Maximal degree in co-relation 104370. Up to 7861 conditions per place. [2024-06-20 16:30:10,143 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 786 selfloop transitions, 116 changer transitions 0/960 dead transitions. [2024-06-20 16:30:10,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 960 transitions, 22209 flow [2024-06-20 16:30:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:30:10,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 16:30:10,144 INFO L175 Difference]: Start difference. First operand has 503 places, 940 transitions, 20280 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:30:10,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 960 transitions, 22209 flow [2024-06-20 16:30:17,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 960 transitions, 21925 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:17,277 INFO L231 Difference]: Finished difference. Result has 506 places, 943 transitions, 20303 flow [2024-06-20 16:30:17,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19996, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20303, PETRI_PLACES=506, PETRI_TRANSITIONS=943} [2024-06-20 16:30:17,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-20 16:30:17,277 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 943 transitions, 20303 flow [2024-06-20 16:30:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:17,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:17,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:30:17,278 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)] === [2024-06-20 16:30:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash -313618310, now seen corresponding path program 10 times [2024-06-20 16:30:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540118125] [2024-06-20 16:30:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:17,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:18,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540118125] [2024-06-20 16:30:18,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540118125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:18,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:18,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:18,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366570556] [2024-06-20 16:30:18,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:18,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:18,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:18,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:30:18,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 943 transitions, 20303 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:18,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:18,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:30:18,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:21,366 INFO L124 PetriNetUnfolderBase]: 5762/8634 cut-off events. [2024-06-20 16:30:21,367 INFO L125 PetriNetUnfolderBase]: For 1767891/1767909 co-relation queries the response was YES. [2024-06-20 16:30:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105150 conditions, 8634 events. 5762/8634 cut-off events. For 1767891/1767909 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49244 event pairs, 1343 based on Foata normal form. 20/8653 useless extension candidates. Maximal degree in co-relation 104924. Up to 8052 conditions per place. [2024-06-20 16:30:21,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 771 selfloop transitions, 187 changer transitions 0/961 dead transitions. [2024-06-20 16:30:21,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 961 transitions, 22707 flow [2024-06-20 16:30:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:30:21,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:30:21,592 INFO L175 Difference]: Start difference. First operand has 506 places, 943 transitions, 20303 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:30:21,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 961 transitions, 22707 flow [2024-06-20 16:30:28,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 961 transitions, 22421 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:28,429 INFO L231 Difference]: Finished difference. Result has 508 places, 943 transitions, 20403 flow [2024-06-20 16:30:28,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20017, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20403, PETRI_PLACES=508, PETRI_TRANSITIONS=943} [2024-06-20 16:30:28,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-20 16:30:28,430 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 943 transitions, 20403 flow [2024-06-20 16:30:28,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:28,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:28,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:28,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:30:28,431 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)] === [2024-06-20 16:30:28,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash -313617938, now seen corresponding path program 9 times [2024-06-20 16:30:28,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:28,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112156668] [2024-06-20 16:30:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112156668] [2024-06-20 16:30:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112156668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:29,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:29,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093095766] [2024-06-20 16:30:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:29,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:29,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:30:29,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 943 transitions, 20403 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:29,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:29,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:30:29,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:32,783 INFO L124 PetriNetUnfolderBase]: 6126/9152 cut-off events. [2024-06-20 16:30:32,783 INFO L125 PetriNetUnfolderBase]: For 1862159/1862161 co-relation queries the response was YES. [2024-06-20 16:30:32,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112427 conditions, 9152 events. 6126/9152 cut-off events. For 1862159/1862161 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 52387 event pairs, 1800 based on Foata normal form. 8/9159 useless extension candidates. Maximal degree in co-relation 112200. Up to 8081 conditions per place. [2024-06-20 16:30:33,039 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 840 selfloop transitions, 247 changer transitions 0/1090 dead transitions. [2024-06-20 16:30:33,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1090 transitions, 27151 flow [2024-06-20 16:30:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:30:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:30:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 16:30:33,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-20 16:30:33,040 INFO L175 Difference]: Start difference. First operand has 508 places, 943 transitions, 20403 flow. Second operand 10 states and 172 transitions. [2024-06-20 16:30:33,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1090 transitions, 27151 flow [2024-06-20 16:30:41,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1090 transitions, 26623 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 16:30:41,593 INFO L231 Difference]: Finished difference. Result has 513 places, 1031 transitions, 23867 flow [2024-06-20 16:30:41,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19984, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23867, PETRI_PLACES=513, PETRI_TRANSITIONS=1031} [2024-06-20 16:30:41,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-20 16:30:41,594 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1031 transitions, 23867 flow [2024-06-20 16:30:41,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:41,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:41,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:41,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:30:41,594 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)] === [2024-06-20 16:30:41,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash 280521104, now seen corresponding path program 7 times [2024-06-20 16:30:41,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:41,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035883505] [2024-06-20 16:30:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:41,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:42,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:42,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035883505] [2024-06-20 16:30:42,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035883505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:42,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:42,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245476925] [2024-06-20 16:30:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:42,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:42,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:42,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1031 transitions, 23867 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:42,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:42,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:42,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:46,165 INFO L124 PetriNetUnfolderBase]: 6024/9059 cut-off events. [2024-06-20 16:30:46,165 INFO L125 PetriNetUnfolderBase]: For 1876430/1876430 co-relation queries the response was YES. [2024-06-20 16:30:46,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113421 conditions, 9059 events. 6024/9059 cut-off events. For 1876430/1876430 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 52576 event pairs, 1768 based on Foata normal form. 4/9062 useless extension candidates. Maximal degree in co-relation 113190. Up to 8559 conditions per place. [2024-06-20 16:30:46,305 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 962 selfloop transitions, 44 changer transitions 0/1065 dead transitions. [2024-06-20 16:30:46,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1065 transitions, 26260 flow [2024-06-20 16:30:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:30:46,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:30:46,306 INFO L175 Difference]: Start difference. First operand has 513 places, 1031 transitions, 23867 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:30:46,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1065 transitions, 26260 flow [2024-06-20 16:30:54,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1065 transitions, 25761 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:54,368 INFO L231 Difference]: Finished difference. Result has 514 places, 1037 transitions, 23623 flow [2024-06-20 16:30:54,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=23368, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23623, PETRI_PLACES=514, PETRI_TRANSITIONS=1037} [2024-06-20 16:30:54,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-20 16:30:54,368 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1037 transitions, 23623 flow [2024-06-20 16:30:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:54,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:54,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:30:54,369 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)] === [2024-06-20 16:30:54,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2065938172, now seen corresponding path program 7 times [2024-06-20 16:30:54,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:54,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273267218] [2024-06-20 16:30:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:54,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:55,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:55,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273267218] [2024-06-20 16:30:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273267218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:55,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218502785] [2024-06-20 16:30:55,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:55,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:55,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:30:55,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1037 transitions, 23623 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:55,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:55,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:30:55,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:58,549 INFO L124 PetriNetUnfolderBase]: 6120/9141 cut-off events. [2024-06-20 16:30:58,549 INFO L125 PetriNetUnfolderBase]: For 1866315/1866315 co-relation queries the response was YES. [2024-06-20 16:30:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113050 conditions, 9141 events. 6120/9141 cut-off events. For 1866315/1866315 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 52354 event pairs, 1872 based on Foata normal form. 2/9142 useless extension candidates. Maximal degree in co-relation 112819. Up to 8988 conditions per place. [2024-06-20 16:30:58,839 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 998 selfloop transitions, 53 changer transitions 0/1054 dead transitions. [2024-06-20 16:30:58,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1054 transitions, 26041 flow [2024-06-20 16:30:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:30:58,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:30:58,840 INFO L175 Difference]: Start difference. First operand has 514 places, 1037 transitions, 23623 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:30:58,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1054 transitions, 26041 flow