./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_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/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix052_power.oepc_power.opt_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-bcb38a6-m [2024-06-03 19:52:43,395 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:52:43,448 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:52:43,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:52:43,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:52:43,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:52:43,465 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:52:43,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:52:43,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:52:43,466 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:52:43,466 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:52:43,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:52:43,467 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:52:43,467 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:52:43,467 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:52:43,468 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:52:43,468 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:52:43,468 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:52:43,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:52:43,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:52:43,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:52:43,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:52:43,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:52:43,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:52:43,470 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:52:43,470 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:52:43,470 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:52:43,470 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:52:43,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:52:43,471 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:52:43,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:52:43,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:52:43,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:52:43,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:52:43,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:52:43,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:52:43,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:52:43,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:52:43,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:52:43,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:52:43,473 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:52:43,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:52:43,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:52:43,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:52:43,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:52:43,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:52:43,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:52:43,684 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:52:43,685 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:52:43,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 19:52:43,909 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:52:43,909 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:52:43,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-03 19:52:44,854 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:52:45,130 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:52:45,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-03 19:52:45,143 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b921e5766/37ce86e621824d719e5577b2b1804463/FLAG4a3dc1ce8 [2024-06-03 19:52:45,157 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b921e5766/37ce86e621824d719e5577b2b1804463 [2024-06-03 19:52:45,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:52:45,159 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:52:45,161 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:52:45,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:52:45,165 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:52:45,166 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:43" (1/2) ... [2024-06-03 19:52:45,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772c5c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:45, skipping insertion in model container [2024-06-03 19:52:45,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:43" (1/2) ... [2024-06-03 19:52:45,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45752ef7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:45, skipping insertion in model container [2024-06-03 19:52:45,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:52:45" (2/2) ... [2024-06-03 19:52:45,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772c5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45, skipping insertion in model container [2024-06-03 19:52:45,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:52:45" (2/2) ... [2024-06-03 19:52:45,168 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:52:45,236 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:52:45,237 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:52:45,237 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:52:45,237 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-03 19:52:45,238 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:52:45,238 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-03 19:52:45,274 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:52:45,538 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:52:45,551 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:52:45,670 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:52:45,714 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:52:45,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45 WrapperNode [2024-06-03 19:52:45,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:52:45,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:52:45,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:52:45,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:52:45,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,765 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-03 19:52:45,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:52:45,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:52:45,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:52:45,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:52:45,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,793 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]. [2024-06-03 19:52:45,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,801 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:52:45,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:52:45,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:52:45,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:52:45,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (1/1) ... [2024-06-03 19:52:45,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:52:45,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:52:45,834 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) [2024-06-03 19:52:45,846 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 [2024-06-03 19:52:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:52:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:52:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:52:45,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:52:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:52:45,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:52:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:52:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:52:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:52:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:52:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:52:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:52:45,870 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:52:45,984 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:52:45,985 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:52:46,266 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:52:46,266 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:52:46,458 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:52:46,458 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:52:46,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:52:46 BoogieIcfgContainer [2024-06-03 19:52:46,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:52:46,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:52:46,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:52:46,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:52:46,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:43" (1/4) ... [2024-06-03 19:52:46,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6dc296 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:52:46, skipping insertion in model container [2024-06-03 19:52:46,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:52:45" (2/4) ... [2024-06-03 19:52:46,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6dc296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:52:46, skipping insertion in model container [2024-06-03 19:52:46,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:45" (3/4) ... [2024-06-03 19:52:46,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6dc296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:52:46, skipping insertion in model container [2024-06-03 19:52:46,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:52:46" (4/4) ... [2024-06-03 19:52:46,466 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-03 19:52:46,479 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:52:46,479 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:52:46,480 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:52:46,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:52:46,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 19:52:46,578 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 19:52:46,578 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:52:46,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:52:46,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 19:52:46,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 19:52:46,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:52:46,599 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;@46bc001b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:52:46,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:52:46,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:52:46,606 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:52:46,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:52:46,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:46,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:52:46,608 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)] === [2024-06-03 19:52:46,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1534033092, now seen corresponding path program 1 times [2024-06-03 19:52:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819004690] [2024-06-03 19:52:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:46,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:47,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819004690] [2024-06-03 19:52:47,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819004690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:47,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:47,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:52:47,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204870766] [2024-06-03 19:52:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:52:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:52:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:52:47,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 19:52:47,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 19:52:47,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:47,916 INFO L124 PetriNetUnfolderBase]: 1363/2075 cut-off events. [2024-06-03 19:52:47,917 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-03 19:52:47,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4201 conditions, 2075 events. 1363/2075 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9692 event pairs, 964 based on Foata normal form. 1/2036 useless extension candidates. Maximal degree in co-relation 4186. Up to 2037 conditions per place. [2024-06-03 19:52:47,931 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 19:52:47,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 175 flow [2024-06-03 19:52:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:52:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:52:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-03 19:52:47,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 19:52:47,942 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-03 19:52:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 175 flow [2024-06-03 19:52:47,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:47,947 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 19:52:47,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 19:52:47,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 19:52:47,951 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 19:52:47,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:47,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:47,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:52:47,952 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)] === [2024-06-03 19:52:47,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1031985189, now seen corresponding path program 1 times [2024-06-03 19:52:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:47,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935505121] [2024-06-03 19:52:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:48,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:48,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935505121] [2024-06-03 19:52:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935505121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:48,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:52:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278172583] [2024-06-03 19:52:48,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:52:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:52:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:52:48,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 19:52:48,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:48,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:48,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 19:52:48,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:48,740 INFO L124 PetriNetUnfolderBase]: 1357/2071 cut-off events. [2024-06-03 19:52:48,741 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-03 19:52:48,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 2071 events. 1357/2071 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9656 event pairs, 840 based on Foata normal form. 3/2073 useless extension candidates. Maximal degree in co-relation 4725. Up to 2013 conditions per place. [2024-06-03 19:52:48,748 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-03 19:52:48,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 242 flow [2024-06-03 19:52:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:52:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:52:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-03 19:52:48,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 19:52:48,750 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 91 transitions. [2024-06-03 19:52:48,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 242 flow [2024-06-03 19:52:48,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:52:48,752 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-03 19:52:48,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 19:52:48,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-03 19:52:48,753 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-03 19:52:48,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:48,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:48,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:48,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:52:48,754 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)] === [2024-06-03 19:52:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1926768673, now seen corresponding path program 1 times [2024-06-03 19:52:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557686884] [2024-06-03 19:52:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557686884] [2024-06-03 19:52:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557686884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:52:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843854285] [2024-06-03 19:52:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:49,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:52:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:52:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:52:49,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 19:52:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:49,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:49,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 19:52:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:49,630 INFO L124 PetriNetUnfolderBase]: 1411/2147 cut-off events. [2024-06-03 19:52:49,630 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-03 19:52:49,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2147 events. 1411/2147 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10031 event pairs, 629 based on Foata normal form. 7/2152 useless extension candidates. Maximal degree in co-relation 5460. Up to 1982 conditions per place. [2024-06-03 19:52:49,641 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 56 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-03 19:52:49,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 404 flow [2024-06-03 19:52:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 19:52:49,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-03 19:52:49,646 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 121 transitions. [2024-06-03 19:52:49,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 404 flow [2024-06-03 19:52:49,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:52:49,650 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 237 flow [2024-06-03 19:52:49,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-03 19:52:49,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-03 19:52:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 237 flow [2024-06-03 19:52:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:49,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:52:49,652 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)] === [2024-06-03 19:52:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1286294586, now seen corresponding path program 1 times [2024-06-03 19:52:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878052053] [2024-06-03 19:52:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:49,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:50,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878052053] [2024-06-03 19:52:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878052053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:50,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:50,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686613844] [2024-06-03 19:52:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:50,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:50,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 19:52:50,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 237 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) [2024-06-03 19:52:50,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:50,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 19:52:50,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:50,786 INFO L124 PetriNetUnfolderBase]: 1433/2180 cut-off events. [2024-06-03 19:52:50,787 INFO L125 PetriNetUnfolderBase]: For 2840/2840 co-relation queries the response was YES. [2024-06-03 19:52:50,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6747 conditions, 2180 events. 1433/2180 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10247 event pairs, 503 based on Foata normal form. 7/2185 useless extension candidates. Maximal degree in co-relation 6727. Up to 1971 conditions per place. [2024-06-03 19:52:50,800 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 64 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-03 19:52:50,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 543 flow [2024-06-03 19:52:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 19:52:50,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 19:52:50,802 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 237 flow. Second operand 6 states and 143 transitions. [2024-06-03 19:52:50,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 543 flow [2024-06-03 19:52:50,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 535 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:52:50,806 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 310 flow [2024-06-03 19:52:50,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-03 19:52:50,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-03 19:52:50,807 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 310 flow [2024-06-03 19:52:50,807 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) [2024-06-03 19:52:50,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:50,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:50,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:52:50,808 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)] === [2024-06-03 19:52:50,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1220427678, now seen corresponding path program 1 times [2024-06-03 19:52:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:50,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499489059] [2024-06-03 19:52:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:51,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499489059] [2024-06-03 19:52:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499489059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:51,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:51,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74939762] [2024-06-03 19:52:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:51,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 19:52:51,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:51,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:51,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 19:52:51,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:52,072 INFO L124 PetriNetUnfolderBase]: 1529/2348 cut-off events. [2024-06-03 19:52:52,073 INFO L125 PetriNetUnfolderBase]: For 4840/4840 co-relation queries the response was YES. [2024-06-03 19:52:52,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8075 conditions, 2348 events. 1529/2348 cut-off events. For 4840/4840 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11492 event pairs, 348 based on Foata normal form. 28/2374 useless extension candidates. Maximal degree in co-relation 8052. Up to 1892 conditions per place. [2024-06-03 19:52:52,084 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 75 selfloop transitions, 33 changer transitions 0/112 dead transitions. [2024-06-03 19:52:52,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 112 transitions, 792 flow [2024-06-03 19:52:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 19:52:52,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 19:52:52,086 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 310 flow. Second operand 7 states and 168 transitions. [2024-06-03 19:52:52,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 112 transitions, 792 flow [2024-06-03 19:52:52,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 112 transitions, 743 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:52,091 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 497 flow [2024-06-03 19:52:52,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-06-03 19:52:52,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-03 19:52:52,092 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 497 flow [2024-06-03 19:52:52,092 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) [2024-06-03 19:52:52,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:52,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:52:52,093 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)] === [2024-06-03 19:52:52,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1106848670, now seen corresponding path program 1 times [2024-06-03 19:52:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38269801] [2024-06-03 19:52:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:52,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:52,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38269801] [2024-06-03 19:52:52,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38269801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:52,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:52,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:52,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029868296] [2024-06-03 19:52:52,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:52,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:52,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:52:52,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 497 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:52,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:52,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:52:52,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:52,951 INFO L124 PetriNetUnfolderBase]: 1519/2344 cut-off events. [2024-06-03 19:52:52,951 INFO L125 PetriNetUnfolderBase]: For 9124/9124 co-relation queries the response was YES. [2024-06-03 19:52:52,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 2344 events. 1519/2344 cut-off events. For 9124/9124 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11628 event pairs, 816 based on Foata normal form. 4/2344 useless extension candidates. Maximal degree in co-relation 9386. Up to 2275 conditions per place. [2024-06-03 19:52:52,971 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 63 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-03 19:52:52,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 689 flow [2024-06-03 19:52:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:52:52,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:52:52,972 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 497 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:52:52,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 689 flow [2024-06-03 19:52:52,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 657 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-03 19:52:52,981 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 520 flow [2024-06-03 19:52:52,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-03 19:52:52,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-03 19:52:52,984 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 520 flow [2024-06-03 19:52:52,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:52,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:52,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:52:52,984 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)] === [2024-06-03 19:52:52,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash -367296669, now seen corresponding path program 1 times [2024-06-03 19:52:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029277676] [2024-06-03 19:52:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:52,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:53,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:53,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029277676] [2024-06-03 19:52:53,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029277676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:53,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:53,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:53,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131024127] [2024-06-03 19:52:53,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:53,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:53,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:53,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:52:53,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:53,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:53,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:52:53,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:53,999 INFO L124 PetriNetUnfolderBase]: 1653/2545 cut-off events. [2024-06-03 19:52:54,000 INFO L125 PetriNetUnfolderBase]: For 10420/10438 co-relation queries the response was YES. [2024-06-03 19:52:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10457 conditions, 2545 events. 1653/2545 cut-off events. For 10420/10438 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12557 event pairs, 484 based on Foata normal form. 26/2569 useless extension candidates. Maximal degree in co-relation 10424. Up to 2306 conditions per place. [2024-06-03 19:52:54,018 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 84 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-03 19:52:54,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 1060 flow [2024-06-03 19:52:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:52:54,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-03 19:52:54,020 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 520 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:52:54,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 1060 flow [2024-06-03 19:52:54,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1027 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:54,031 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 770 flow [2024-06-03 19:52:54,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=770, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-03 19:52:54,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 19:52:54,033 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 770 flow [2024-06-03 19:52:54,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:54,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:54,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:54,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:52:54,034 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)] === [2024-06-03 19:52:54,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1847359781, now seen corresponding path program 2 times [2024-06-03 19:52:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:54,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841661805] [2024-06-03 19:52:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:54,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841661805] [2024-06-03 19:52:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841661805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:54,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:54,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:54,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768321956] [2024-06-03 19:52:54,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:54,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:52:54,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 770 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:54,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:54,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:52:54,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:55,104 INFO L124 PetriNetUnfolderBase]: 1673/2578 cut-off events. [2024-06-03 19:52:55,104 INFO L125 PetriNetUnfolderBase]: For 13096/13120 co-relation queries the response was YES. [2024-06-03 19:52:55,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11430 conditions, 2578 events. 1673/2578 cut-off events. For 13096/13120 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12765 event pairs, 495 based on Foata normal form. 36/2612 useless extension candidates. Maximal degree in co-relation 11395. Up to 2265 conditions per place. [2024-06-03 19:52:55,126 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 73 selfloop transitions, 40 changer transitions 0/117 dead transitions. [2024-06-03 19:52:55,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 1184 flow [2024-06-03 19:52:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 19:52:55,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-03 19:52:55,128 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 770 flow. Second operand 6 states and 118 transitions. [2024-06-03 19:52:55,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 1184 flow [2024-06-03 19:52:55,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 1163 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:52:55,146 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 933 flow [2024-06-03 19:52:55,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=933, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2024-06-03 19:52:55,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-03 19:52:55,149 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 933 flow [2024-06-03 19:52:55,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:55,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:55,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:55,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:52:55,150 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)] === [2024-06-03 19:52:55,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1856763941, now seen corresponding path program 3 times [2024-06-03 19:52:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:55,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58912014] [2024-06-03 19:52:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:55,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:55,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58912014] [2024-06-03 19:52:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58912014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:55,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:55,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:55,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220704849] [2024-06-03 19:52:55,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:55,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:52:55,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 933 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:55,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:52:55,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:56,122 INFO L124 PetriNetUnfolderBase]: 1637/2526 cut-off events. [2024-06-03 19:52:56,122 INFO L125 PetriNetUnfolderBase]: For 15172/15172 co-relation queries the response was YES. [2024-06-03 19:52:56,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11536 conditions, 2526 events. 1637/2526 cut-off events. For 15172/15172 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12540 event pairs, 804 based on Foata normal form. 6/2529 useless extension candidates. Maximal degree in co-relation 11499. Up to 2427 conditions per place. [2024-06-03 19:52:56,138 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 93 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-03 19:52:56,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 1208 flow [2024-06-03 19:52:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:52:56,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:52:56,140 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 933 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:52:56,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 1208 flow [2024-06-03 19:52:56,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 1143 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:56,211 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 909 flow [2024-06-03 19:52:56,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-03 19:52:56,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-03 19:52:56,212 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 909 flow [2024-06-03 19:52:56,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:56,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:56,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:56,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:52:56,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:56,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1967673093, now seen corresponding path program 1 times [2024-06-03 19:52:56,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:56,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032747482] [2024-06-03 19:52:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032747482] [2024-06-03 19:52:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032747482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:57,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:57,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256611088] [2024-06-03 19:52:57,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:57,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:52:57,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 909 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:57,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:57,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:52:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:57,802 INFO L124 PetriNetUnfolderBase]: 2014/3049 cut-off events. [2024-06-03 19:52:57,802 INFO L125 PetriNetUnfolderBase]: For 17854/17854 co-relation queries the response was YES. [2024-06-03 19:52:57,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13530 conditions, 3049 events. 2014/3049 cut-off events. For 17854/17854 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14522 event pairs, 1010 based on Foata normal form. 4/3052 useless extension candidates. Maximal degree in co-relation 13492. Up to 2964 conditions per place. [2024-06-03 19:52:57,820 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-03 19:52:57,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1248 flow [2024-06-03 19:52:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:52:57,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 19:52:57,821 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 909 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:52:57,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1248 flow [2024-06-03 19:52:57,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1156 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:57,841 INFO L231 Difference]: Finished difference. Result has 83 places, 100 transitions, 917 flow [2024-06-03 19:52:57,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=917, PETRI_PLACES=83, PETRI_TRANSITIONS=100} [2024-06-03 19:52:57,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-03 19:52:57,842 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 100 transitions, 917 flow [2024-06-03 19:52:57,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:57,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:57,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:57,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:52:57,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:52:57,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2113124872, now seen corresponding path program 1 times [2024-06-03 19:52:57,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:57,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856994177] [2024-06-03 19:52:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:57,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:58,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:58,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856994177] [2024-06-03 19:52:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856994177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:58,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633171817] [2024-06-03 19:52:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:58,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:58,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:52:58,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 100 transitions, 917 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:58,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:58,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:52:58,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:58,818 INFO L124 PetriNetUnfolderBase]: 2005/3037 cut-off events. [2024-06-03 19:52:58,818 INFO L125 PetriNetUnfolderBase]: For 18740/18740 co-relation queries the response was YES. [2024-06-03 19:52:58,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13867 conditions, 3037 events. 2005/3037 cut-off events. For 18740/18740 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14339 event pairs, 1022 based on Foata normal form. 3/3039 useless extension candidates. Maximal degree in co-relation 13828. Up to 2988 conditions per place. [2024-06-03 19:52:58,838 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 99 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2024-06-03 19:52:58,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 1183 flow [2024-06-03 19:52:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-03 19:52:58,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 19:52:58,839 INFO L175 Difference]: Start difference. First operand has 83 places, 100 transitions, 917 flow. Second operand 6 states and 94 transitions. [2024-06-03 19:52:58,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 1183 flow [2024-06-03 19:52:58,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 1140 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:58,861 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 930 flow [2024-06-03 19:52:58,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=930, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-06-03 19:52:58,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-03 19:52:58,862 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 930 flow [2024-06-03 19:52:58,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:58,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:58,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:58,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:52:58,862 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)] === [2024-06-03 19:52:58,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:58,863 INFO L85 PathProgramCache]: Analyzing trace with hash 728842812, now seen corresponding path program 1 times [2024-06-03 19:52:58,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:58,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072307713] [2024-06-03 19:52:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:58,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:59,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072307713] [2024-06-03 19:52:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072307713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:59,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:52:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87797129] [2024-06-03 19:52:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:59,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:52:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:52:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:52:59,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:52:59,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 930 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:59,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:59,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:52:59,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:00,187 INFO L124 PetriNetUnfolderBase]: 1965/3006 cut-off events. [2024-06-03 19:53:00,187 INFO L125 PetriNetUnfolderBase]: For 20135/20171 co-relation queries the response was YES. [2024-06-03 19:53:00,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14122 conditions, 3006 events. 1965/3006 cut-off events. For 20135/20171 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14957 event pairs, 507 based on Foata normal form. 40/3042 useless extension candidates. Maximal degree in co-relation 14082. Up to 2631 conditions per place. [2024-06-03 19:53:00,202 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 103 selfloop transitions, 44 changer transitions 0/152 dead transitions. [2024-06-03 19:53:00,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1505 flow [2024-06-03 19:53:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:53:00,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-03 19:53:00,203 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 930 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:53:00,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1505 flow [2024-06-03 19:53:00,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 152 transitions, 1471 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:00,223 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 1102 flow [2024-06-03 19:53:00,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1102, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-06-03 19:53:00,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-03 19:53:00,223 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 1102 flow [2024-06-03 19:53:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:00,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:00,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:53:00,224 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)] === [2024-06-03 19:53:00,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 282589732, now seen corresponding path program 2 times [2024-06-03 19:53:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:00,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033053633] [2024-06-03 19:53:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033053633] [2024-06-03 19:53:00,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033053633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:00,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:00,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:00,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61729923] [2024-06-03 19:53:00,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:00,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:00,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:00,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:00,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 1102 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) [2024-06-03 19:53:00,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:00,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:00,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:01,360 INFO L124 PetriNetUnfolderBase]: 2022/3106 cut-off events. [2024-06-03 19:53:01,361 INFO L125 PetriNetUnfolderBase]: For 25130/25154 co-relation queries the response was YES. [2024-06-03 19:53:01,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15513 conditions, 3106 events. 2022/3106 cut-off events. For 25130/25154 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15632 event pairs, 562 based on Foata normal form. 28/3131 useless extension candidates. Maximal degree in co-relation 15471. Up to 2506 conditions per place. [2024-06-03 19:53:01,381 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 85 selfloop transitions, 84 changer transitions 0/174 dead transitions. [2024-06-03 19:53:01,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1952 flow [2024-06-03 19:53:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:53:01,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-03 19:53:01,383 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 1102 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:53:01,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1952 flow [2024-06-03 19:53:01,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 174 transitions, 1882 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:01,412 INFO L231 Difference]: Finished difference. Result has 95 places, 141 transitions, 1583 flow [2024-06-03 19:53:01,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1583, PETRI_PLACES=95, PETRI_TRANSITIONS=141} [2024-06-03 19:53:01,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 19:53:01,413 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 141 transitions, 1583 flow [2024-06-03 19:53:01,413 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) [2024-06-03 19:53:01,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:01,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:01,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:53:01,414 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:01,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2075876482, now seen corresponding path program 3 times [2024-06-03 19:53:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:01,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893277743] [2024-06-03 19:53:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893277743] [2024-06-03 19:53:02,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893277743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:02,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:02,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896295344] [2024-06-03 19:53:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:02,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:02,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:02,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:02,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 141 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:02,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:02,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:02,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:02,875 INFO L124 PetriNetUnfolderBase]: 2075/3183 cut-off events. [2024-06-03 19:53:02,875 INFO L125 PetriNetUnfolderBase]: For 29569/29599 co-relation queries the response was YES. [2024-06-03 19:53:02,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17100 conditions, 3183 events. 2075/3183 cut-off events. For 29569/29599 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16040 event pairs, 497 based on Foata normal form. 38/3218 useless extension candidates. Maximal degree in co-relation 17054. Up to 2600 conditions per place. [2024-06-03 19:53:02,897 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 97 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-06-03 19:53:02,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 2087 flow [2024-06-03 19:53:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:53:02,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-03 19:53:02,899 INFO L175 Difference]: Start difference. First operand has 95 places, 141 transitions, 1583 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:53:02,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 2087 flow [2024-06-03 19:53:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 177 transitions, 2037 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:02,943 INFO L231 Difference]: Finished difference. Result has 100 places, 141 transitions, 1709 flow [2024-06-03 19:53:02,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=100, PETRI_TRANSITIONS=141} [2024-06-03 19:53:02,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-03 19:53:02,944 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 141 transitions, 1709 flow [2024-06-03 19:53:02,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:02,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:02,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:02,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:53:02,944 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)] === [2024-06-03 19:53:02,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash -47515680, now seen corresponding path program 1 times [2024-06-03 19:53:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18152995] [2024-06-03 19:53:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:02,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:03,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:03,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18152995] [2024-06-03 19:53:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18152995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:03,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:03,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809458125] [2024-06-03 19:53:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:03,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:03,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:03,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:03,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 141 transitions, 1709 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:03,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:03,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:03,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:04,366 INFO L124 PetriNetUnfolderBase]: 2268/3436 cut-off events. [2024-06-03 19:53:04,366 INFO L125 PetriNetUnfolderBase]: For 32195/32195 co-relation queries the response was YES. [2024-06-03 19:53:04,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18793 conditions, 3436 events. 2268/3436 cut-off events. For 32195/32195 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16665 event pairs, 1045 based on Foata normal form. 3/3438 useless extension candidates. Maximal degree in co-relation 18746. Up to 3313 conditions per place. [2024-06-03 19:53:04,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 139 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-06-03 19:53:04,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 170 transitions, 2258 flow [2024-06-03 19:53:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:53:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 19:53:04,391 INFO L175 Difference]: Start difference. First operand has 100 places, 141 transitions, 1709 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:53:04,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 170 transitions, 2258 flow [2024-06-03 19:53:04,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 170 transitions, 2040 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:04,432 INFO L231 Difference]: Finished difference. Result has 102 places, 149 transitions, 1711 flow [2024-06-03 19:53:04,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1711, PETRI_PLACES=102, PETRI_TRANSITIONS=149} [2024-06-03 19:53:04,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-03 19:53:04,433 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 149 transitions, 1711 flow [2024-06-03 19:53:04,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:04,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:04,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:04,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:53:04,434 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)] === [2024-06-03 19:53:04,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -393254834, now seen corresponding path program 1 times [2024-06-03 19:53:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595785853] [2024-06-03 19:53:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:04,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:05,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:05,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595785853] [2024-06-03 19:53:05,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595785853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:05,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:05,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380023243] [2024-06-03 19:53:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:05,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:05,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 149 transitions, 1711 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) [2024-06-03 19:53:05,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:05,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:05,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:05,990 INFO L124 PetriNetUnfolderBase]: 2418/3748 cut-off events. [2024-06-03 19:53:05,991 INFO L125 PetriNetUnfolderBase]: For 36887/36933 co-relation queries the response was YES. [2024-06-03 19:53:06,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19769 conditions, 3748 events. 2418/3748 cut-off events. For 36887/36933 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20068 event pairs, 578 based on Foata normal form. 62/3802 useless extension candidates. Maximal degree in co-relation 19721. Up to 2829 conditions per place. [2024-06-03 19:53:06,013 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 154 selfloop transitions, 47 changer transitions 0/206 dead transitions. [2024-06-03 19:53:06,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 206 transitions, 2488 flow [2024-06-03 19:53:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:53:06,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-03 19:53:06,019 INFO L175 Difference]: Start difference. First operand has 102 places, 149 transitions, 1711 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:53:06,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 206 transitions, 2488 flow [2024-06-03 19:53:06,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 206 transitions, 2386 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:53:06,059 INFO L231 Difference]: Finished difference. Result has 105 places, 153 transitions, 1784 flow [2024-06-03 19:53:06,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1784, PETRI_PLACES=105, PETRI_TRANSITIONS=153} [2024-06-03 19:53:06,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-03 19:53:06,060 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 153 transitions, 1784 flow [2024-06-03 19:53:06,060 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) [2024-06-03 19:53:06,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:06,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:06,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:53:06,061 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:06,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -587133794, now seen corresponding path program 2 times [2024-06-03 19:53:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:06,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927400254] [2024-06-03 19:53:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:06,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:06,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927400254] [2024-06-03 19:53:06,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927400254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:06,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:06,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:06,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322360877] [2024-06-03 19:53:06,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:06,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:06,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:06,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:06,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 153 transitions, 1784 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) [2024-06-03 19:53:06,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:06,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:07,734 INFO L124 PetriNetUnfolderBase]: 2500/3886 cut-off events. [2024-06-03 19:53:07,735 INFO L125 PetriNetUnfolderBase]: For 42449/42495 co-relation queries the response was YES. [2024-06-03 19:53:07,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20991 conditions, 3886 events. 2500/3886 cut-off events. For 42449/42495 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21034 event pairs, 635 based on Foata normal form. 74/3954 useless extension candidates. Maximal degree in co-relation 20941. Up to 3315 conditions per place. [2024-06-03 19:53:07,763 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 151 selfloop transitions, 49 changer transitions 0/205 dead transitions. [2024-06-03 19:53:07,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 205 transitions, 2461 flow [2024-06-03 19:53:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:53:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:53:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:53:07,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-03 19:53:07,765 INFO L175 Difference]: Start difference. First operand has 105 places, 153 transitions, 1784 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:53:07,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 205 transitions, 2461 flow [2024-06-03 19:53:07,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 205 transitions, 2402 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:07,819 INFO L231 Difference]: Finished difference. Result has 110 places, 155 transitions, 1861 flow [2024-06-03 19:53:07,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1861, PETRI_PLACES=110, PETRI_TRANSITIONS=155} [2024-06-03 19:53:07,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-03 19:53:07,820 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 155 transitions, 1861 flow [2024-06-03 19:53:07,820 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) [2024-06-03 19:53:07,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:07,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:07,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:53:07,821 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)] === [2024-06-03 19:53:07,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash 608798016, now seen corresponding path program 3 times [2024-06-03 19:53:07,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004335787] [2024-06-03 19:53:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:07,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004335787] [2024-06-03 19:53:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004335787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:08,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291387890] [2024-06-03 19:53:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:08,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:08,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:08,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 155 transitions, 1861 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) [2024-06-03 19:53:08,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:08,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:08,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:09,244 INFO L124 PetriNetUnfolderBase]: 3114/4960 cut-off events. [2024-06-03 19:53:09,245 INFO L125 PetriNetUnfolderBase]: For 57006/57041 co-relation queries the response was YES. [2024-06-03 19:53:09,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26935 conditions, 4960 events. 3114/4960 cut-off events. For 57006/57041 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29444 event pairs, 527 based on Foata normal form. 44/4997 useless extension candidates. Maximal degree in co-relation 26883. Up to 2403 conditions per place. [2024-06-03 19:53:09,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 112 selfloop transitions, 100 changer transitions 0/217 dead transitions. [2024-06-03 19:53:09,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 217 transitions, 2824 flow [2024-06-03 19:53:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:53:09,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 19:53:09,283 INFO L175 Difference]: Start difference. First operand has 110 places, 155 transitions, 1861 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:53:09,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 217 transitions, 2824 flow [2024-06-03 19:53:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 2709 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 19:53:09,358 INFO L231 Difference]: Finished difference. Result has 112 places, 167 transitions, 2190 flow [2024-06-03 19:53:09,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2190, PETRI_PLACES=112, PETRI_TRANSITIONS=167} [2024-06-03 19:53:09,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-03 19:53:09,359 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 167 transitions, 2190 flow [2024-06-03 19:53:09,359 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) [2024-06-03 19:53:09,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:09,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:09,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:53:09,359 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)] === [2024-06-03 19:53:09,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 170027756, now seen corresponding path program 4 times [2024-06-03 19:53:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79443647] [2024-06-03 19:53:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:09,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:09,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79443647] [2024-06-03 19:53:09,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79443647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:09,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:09,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:09,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148226964] [2024-06-03 19:53:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:09,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 167 transitions, 2190 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) [2024-06-03 19:53:09,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:09,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:09,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:10,838 INFO L124 PetriNetUnfolderBase]: 3562/5678 cut-off events. [2024-06-03 19:53:10,838 INFO L125 PetriNetUnfolderBase]: For 76204/76257 co-relation queries the response was YES. [2024-06-03 19:53:10,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 5678 events. 3562/5678 cut-off events. For 76204/76257 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34855 event pairs, 981 based on Foata normal form. 74/5745 useless extension candidates. Maximal degree in co-relation 32251. Up to 3352 conditions per place. [2024-06-03 19:53:10,872 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 106 changer transitions 0/228 dead transitions. [2024-06-03 19:53:10,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 228 transitions, 3229 flow [2024-06-03 19:53:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:53:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-03 19:53:10,890 INFO L175 Difference]: Start difference. First operand has 112 places, 167 transitions, 2190 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:53:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 228 transitions, 3229 flow [2024-06-03 19:53:10,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 228 transitions, 3114 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:10,983 INFO L231 Difference]: Finished difference. Result has 117 places, 176 transitions, 2511 flow [2024-06-03 19:53:10,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2511, PETRI_PLACES=117, PETRI_TRANSITIONS=176} [2024-06-03 19:53:10,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-03 19:53:10,984 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 176 transitions, 2511 flow [2024-06-03 19:53:10,984 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) [2024-06-03 19:53:10,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:10,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:10,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:53:10,985 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)] === [2024-06-03 19:53:10,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:10,985 INFO L85 PathProgramCache]: Analyzing trace with hash 170347676, now seen corresponding path program 5 times [2024-06-03 19:53:10,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:10,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716841440] [2024-06-03 19:53:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:11,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:11,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716841440] [2024-06-03 19:53:11,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716841440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:11,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:11,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:11,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678050150] [2024-06-03 19:53:11,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:11,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:11,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:11,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:11,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 176 transitions, 2511 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) [2024-06-03 19:53:11,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:11,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:11,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:12,692 INFO L124 PetriNetUnfolderBase]: 3575/5713 cut-off events. [2024-06-03 19:53:12,693 INFO L125 PetriNetUnfolderBase]: For 83919/83986 co-relation queries the response was YES. [2024-06-03 19:53:12,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33692 conditions, 5713 events. 3575/5713 cut-off events. For 83919/83986 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35249 event pairs, 1063 based on Foata normal form. 94/5804 useless extension candidates. Maximal degree in co-relation 33635. Up to 4524 conditions per place. [2024-06-03 19:53:12,738 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 96 changer transitions 0/221 dead transitions. [2024-06-03 19:53:12,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 221 transitions, 3307 flow [2024-06-03 19:53:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:53:12,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:53:12,740 INFO L175 Difference]: Start difference. First operand has 117 places, 176 transitions, 2511 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:53:12,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 221 transitions, 3307 flow [2024-06-03 19:53:12,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 221 transitions, 3176 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:12,875 INFO L231 Difference]: Finished difference. Result has 120 places, 177 transitions, 2618 flow [2024-06-03 19:53:12,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2618, PETRI_PLACES=120, PETRI_TRANSITIONS=177} [2024-06-03 19:53:12,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-03 19:53:12,876 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 177 transitions, 2618 flow [2024-06-03 19:53:12,876 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) [2024-06-03 19:53:12,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:12,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:12,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:53:12,877 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:12,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 924558183, now seen corresponding path program 1 times [2024-06-03 19:53:12,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:12,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140493406] [2024-06-03 19:53:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:13,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:13,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140493406] [2024-06-03 19:53:13,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140493406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:13,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:13,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:13,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224877839] [2024-06-03 19:53:13,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:13,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:13,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:13,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:13,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 177 transitions, 2618 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:13,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:13,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:13,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:14,259 INFO L124 PetriNetUnfolderBase]: 3979/6261 cut-off events. [2024-06-03 19:53:14,259 INFO L125 PetriNetUnfolderBase]: For 85784/85784 co-relation queries the response was YES. [2024-06-03 19:53:14,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37276 conditions, 6261 events. 3979/6261 cut-off events. For 85784/85784 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37335 event pairs, 1865 based on Foata normal form. 3/6263 useless extension candidates. Maximal degree in co-relation 37218. Up to 6093 conditions per place. [2024-06-03 19:53:14,305 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 21 changer transitions 0/209 dead transitions. [2024-06-03 19:53:14,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 3224 flow [2024-06-03 19:53:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:53:14,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-03 19:53:14,307 INFO L175 Difference]: Start difference. First operand has 120 places, 177 transitions, 2618 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:53:14,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 3224 flow [2024-06-03 19:53:14,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 209 transitions, 3026 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:14,441 INFO L231 Difference]: Finished difference. Result has 123 places, 189 transitions, 2597 flow [2024-06-03 19:53:14,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=123, PETRI_TRANSITIONS=189} [2024-06-03 19:53:14,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 19:53:14,442 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 189 transitions, 2597 flow [2024-06-03 19:53:14,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:14,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:14,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:14,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:53:14,443 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)] === [2024-06-03 19:53:14,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash 72278624, now seen corresponding path program 6 times [2024-06-03 19:53:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:14,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278844512] [2024-06-03 19:53:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:15,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278844512] [2024-06-03 19:53:15,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278844512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:15,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:15,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559041288] [2024-06-03 19:53:15,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:15,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:15,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:15,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:15,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 189 transitions, 2597 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) [2024-06-03 19:53:15,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:15,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:15,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:16,395 INFO L124 PetriNetUnfolderBase]: 4075/6522 cut-off events. [2024-06-03 19:53:16,396 INFO L125 PetriNetUnfolderBase]: For 98748/98799 co-relation queries the response was YES. [2024-06-03 19:53:16,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39245 conditions, 6522 events. 4075/6522 cut-off events. For 98748/98799 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 41275 event pairs, 992 based on Foata normal form. 72/6587 useless extension candidates. Maximal degree in co-relation 39184. Up to 3378 conditions per place. [2024-06-03 19:53:16,454 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 103 changer transitions 0/243 dead transitions. [2024-06-03 19:53:16,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 243 transitions, 3518 flow [2024-06-03 19:53:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:53:16,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-03 19:53:16,456 INFO L175 Difference]: Start difference. First operand has 123 places, 189 transitions, 2597 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:53:16,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 243 transitions, 3518 flow [2024-06-03 19:53:16,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 243 transitions, 3494 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-03 19:53:16,606 INFO L231 Difference]: Finished difference. Result has 131 places, 197 transitions, 3017 flow [2024-06-03 19:53:16,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3017, PETRI_PLACES=131, PETRI_TRANSITIONS=197} [2024-06-03 19:53:16,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 19:53:16,607 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 197 transitions, 3017 flow [2024-06-03 19:53:16,607 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) [2024-06-03 19:53:16,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:16,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:16,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:53:16,608 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:16,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1786925360, now seen corresponding path program 7 times [2024-06-03 19:53:16,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:16,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416162785] [2024-06-03 19:53:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:16,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416162785] [2024-06-03 19:53:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416162785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:17,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830642981] [2024-06-03 19:53:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:17,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:17,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:17,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:17,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 197 transitions, 3017 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) [2024-06-03 19:53:17,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:17,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:17,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:18,649 INFO L124 PetriNetUnfolderBase]: 4430/7103 cut-off events. [2024-06-03 19:53:18,650 INFO L125 PetriNetUnfolderBase]: For 123849/123912 co-relation queries the response was YES. [2024-06-03 19:53:18,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44817 conditions, 7103 events. 4430/7103 cut-off events. For 123849/123912 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46182 event pairs, 1415 based on Foata normal form. 100/7197 useless extension candidates. Maximal degree in co-relation 44752. Up to 5689 conditions per place. [2024-06-03 19:53:18,700 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 109 changer transitions 0/249 dead transitions. [2024-06-03 19:53:18,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 249 transitions, 4024 flow [2024-06-03 19:53:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:53:18,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-03 19:53:18,702 INFO L175 Difference]: Start difference. First operand has 131 places, 197 transitions, 3017 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:53:18,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 249 transitions, 4024 flow [2024-06-03 19:53:18,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 249 transitions, 3894 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:18,859 INFO L231 Difference]: Finished difference. Result has 134 places, 211 transitions, 3421 flow [2024-06-03 19:53:18,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3421, PETRI_PLACES=134, PETRI_TRANSITIONS=211} [2024-06-03 19:53:18,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-03 19:53:18,860 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 211 transitions, 3421 flow [2024-06-03 19:53:18,860 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) [2024-06-03 19:53:18,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:18,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:18,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:53:18,861 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:18,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1784128850, now seen corresponding path program 8 times [2024-06-03 19:53:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:18,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919650209] [2024-06-03 19:53:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:19,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919650209] [2024-06-03 19:53:19,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919650209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:19,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:19,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357280521] [2024-06-03 19:53:19,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:19,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:19,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 211 transitions, 3421 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) [2024-06-03 19:53:19,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:19,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:19,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:20,940 INFO L124 PetriNetUnfolderBase]: 4606/7418 cut-off events. [2024-06-03 19:53:20,940 INFO L125 PetriNetUnfolderBase]: For 126052/126072 co-relation queries the response was YES. [2024-06-03 19:53:20,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46753 conditions, 7418 events. 4606/7418 cut-off events. For 126052/126072 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 48801 event pairs, 1676 based on Foata normal form. 90/7500 useless extension candidates. Maximal degree in co-relation 46687. Up to 6141 conditions per place. [2024-06-03 19:53:21,008 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 174 selfloop transitions, 75 changer transitions 0/254 dead transitions. [2024-06-03 19:53:21,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 254 transitions, 4233 flow [2024-06-03 19:53:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:53:21,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-03 19:53:21,012 INFO L175 Difference]: Start difference. First operand has 134 places, 211 transitions, 3421 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:53:21,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 254 transitions, 4233 flow [2024-06-03 19:53:21,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 254 transitions, 4065 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:21,213 INFO L231 Difference]: Finished difference. Result has 138 places, 216 transitions, 3564 flow [2024-06-03 19:53:21,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3564, PETRI_PLACES=138, PETRI_TRANSITIONS=216} [2024-06-03 19:53:21,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-03 19:53:21,213 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 216 transitions, 3564 flow [2024-06-03 19:53:21,214 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) [2024-06-03 19:53:21,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:21,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:21,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:53:21,214 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)] === [2024-06-03 19:53:21,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:21,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1815342161, now seen corresponding path program 2 times [2024-06-03 19:53:21,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:21,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055118971] [2024-06-03 19:53:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055118971] [2024-06-03 19:53:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055118971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:21,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:21,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819732138] [2024-06-03 19:53:21,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:21,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:21,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:21,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:21,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:21,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 216 transitions, 3564 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:21,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:21,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:21,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:22,991 INFO L124 PetriNetUnfolderBase]: 5127/8153 cut-off events. [2024-06-03 19:53:22,991 INFO L125 PetriNetUnfolderBase]: For 130638/130638 co-relation queries the response was YES. [2024-06-03 19:53:23,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51640 conditions, 8153 events. 5127/8153 cut-off events. For 130638/130638 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 52309 event pairs, 2450 based on Foata normal form. 3/8155 useless extension candidates. Maximal degree in co-relation 51573. Up to 7931 conditions per place. [2024-06-03 19:53:23,065 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 27 changer transitions 0/242 dead transitions. [2024-06-03 19:53:23,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 242 transitions, 4241 flow [2024-06-03 19:53:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:53:23,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:53:23,066 INFO L175 Difference]: Start difference. First operand has 138 places, 216 transitions, 3564 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:53:23,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 242 transitions, 4241 flow [2024-06-03 19:53:23,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 242 transitions, 4018 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 19:53:23,308 INFO L231 Difference]: Finished difference. Result has 137 places, 224 transitions, 3509 flow [2024-06-03 19:53:23,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3509, PETRI_PLACES=137, PETRI_TRANSITIONS=224} [2024-06-03 19:53:23,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-03 19:53:23,310 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 224 transitions, 3509 flow [2024-06-03 19:53:23,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:23,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:23,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:23,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:53:23,310 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:23,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1384689668, now seen corresponding path program 1 times [2024-06-03 19:53:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:23,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321192539] [2024-06-03 19:53:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:24,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:24,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321192539] [2024-06-03 19:53:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321192539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:24,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756142524] [2024-06-03 19:53:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:24,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:24,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 224 transitions, 3509 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:24,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:24,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:24,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:25,347 INFO L124 PetriNetUnfolderBase]: 5177/8243 cut-off events. [2024-06-03 19:53:25,347 INFO L125 PetriNetUnfolderBase]: For 132734/132734 co-relation queries the response was YES. [2024-06-03 19:53:25,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51696 conditions, 8243 events. 5177/8243 cut-off events. For 132734/132734 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53120 event pairs, 2575 based on Foata normal form. 10/8252 useless extension candidates. Maximal degree in co-relation 51628. Up to 7933 conditions per place. [2024-06-03 19:53:25,422 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/262 dead transitions. [2024-06-03 19:53:25,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 262 transitions, 4362 flow [2024-06-03 19:53:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:53:25,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:53:25,423 INFO L175 Difference]: Start difference. First operand has 137 places, 224 transitions, 3509 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:53:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 262 transitions, 4362 flow [2024-06-03 19:53:25,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 262 transitions, 4307 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 19:53:25,642 INFO L231 Difference]: Finished difference. Result has 144 places, 233 transitions, 3761 flow [2024-06-03 19:53:25,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3761, PETRI_PLACES=144, PETRI_TRANSITIONS=233} [2024-06-03 19:53:25,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 19:53:25,643 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 233 transitions, 3761 flow [2024-06-03 19:53:25,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:25,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:25,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:25,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:53:25,643 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:25,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -842864796, now seen corresponding path program 2 times [2024-06-03 19:53:25,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:25,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913648776] [2024-06-03 19:53:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:26,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913648776] [2024-06-03 19:53:26,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913648776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:26,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:26,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:26,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189854108] [2024-06-03 19:53:26,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:26,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:26,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:26,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:26,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 233 transitions, 3761 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:26,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:26,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:26,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:27,891 INFO L124 PetriNetUnfolderBase]: 5169/8211 cut-off events. [2024-06-03 19:53:27,891 INFO L125 PetriNetUnfolderBase]: For 138633/138633 co-relation queries the response was YES. [2024-06-03 19:53:27,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52456 conditions, 8211 events. 5169/8211 cut-off events. For 138633/138633 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 52390 event pairs, 2538 based on Foata normal form. 4/8214 useless extension candidates. Maximal degree in co-relation 52385. Up to 7984 conditions per place. [2024-06-03 19:53:27,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-03 19:53:27,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 259 transitions, 4395 flow [2024-06-03 19:53:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:53:27,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 19:53:27,965 INFO L175 Difference]: Start difference. First operand has 144 places, 233 transitions, 3761 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:53:27,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 259 transitions, 4395 flow [2024-06-03 19:53:28,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 259 transitions, 4231 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:28,193 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 3676 flow [2024-06-03 19:53:28,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-03 19:53:28,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-03 19:53:28,194 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 3676 flow [2024-06-03 19:53:28,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:28,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:28,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:28,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:53:28,195 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:28,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:28,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1148514556, now seen corresponding path program 1 times [2024-06-03 19:53:28,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:28,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727080004] [2024-06-03 19:53:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:28,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727080004] [2024-06-03 19:53:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727080004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:28,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702574594] [2024-06-03 19:53:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:28,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:28,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:28,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:29,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:29,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 3676 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-03 19:53:29,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:29,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:29,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:30,143 INFO L124 PetriNetUnfolderBase]: 5134/8139 cut-off events. [2024-06-03 19:53:30,143 INFO L125 PetriNetUnfolderBase]: For 141443/141455 co-relation queries the response was YES. [2024-06-03 19:53:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52071 conditions, 8139 events. 5134/8139 cut-off events. For 141443/141455 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 51976 event pairs, 1935 based on Foata normal form. 13/8151 useless extension candidates. Maximal degree in co-relation 51999. Up to 7551 conditions per place. [2024-06-03 19:53:30,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 72 changer transitions 0/261 dead transitions. [2024-06-03 19:53:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 261 transitions, 4317 flow [2024-06-03 19:53:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 19:53:30,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-03 19:53:30,224 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 3676 flow. Second operand 6 states and 118 transitions. [2024-06-03 19:53:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 261 transitions, 4317 flow [2024-06-03 19:53:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 4240 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:30,545 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 3772 flow [2024-06-03 19:53:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3772, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-03 19:53:30,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-03 19:53:30,550 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 3772 flow [2024-06-03 19:53:30,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-03 19:53:30,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:30,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:53:30,550 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)] === [2024-06-03 19:53:30,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1732593552, now seen corresponding path program 3 times [2024-06-03 19:53:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381590484] [2024-06-03 19:53:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:31,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381590484] [2024-06-03 19:53:31,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381590484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:31,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:31,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:31,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748147667] [2024-06-03 19:53:31,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:31,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:31,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:31,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:31,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 3772 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:31,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:31,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:31,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:32,799 INFO L124 PetriNetUnfolderBase]: 5111/8131 cut-off events. [2024-06-03 19:53:32,800 INFO L125 PetriNetUnfolderBase]: For 150742/150742 co-relation queries the response was YES. [2024-06-03 19:53:32,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52254 conditions, 8131 events. 5111/8131 cut-off events. For 150742/150742 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52120 event pairs, 2564 based on Foata normal form. 10/8140 useless extension candidates. Maximal degree in co-relation 52181. Up to 7864 conditions per place. [2024-06-03 19:53:32,874 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 25 changer transitions 0/266 dead transitions. [2024-06-03 19:53:32,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 266 transitions, 4560 flow [2024-06-03 19:53:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:53:32,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 19:53:32,875 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 3772 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:53:32,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 266 transitions, 4560 flow [2024-06-03 19:53:33,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 266 transitions, 4416 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:33,107 INFO L231 Difference]: Finished difference. Result has 150 places, 240 transitions, 3849 flow [2024-06-03 19:53:33,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=150, PETRI_TRANSITIONS=240} [2024-06-03 19:53:33,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-03 19:53:33,108 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 240 transitions, 3849 flow [2024-06-03 19:53:33,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:33,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:33,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:33,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:53:33,109 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)] === [2024-06-03 19:53:33,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1148514308, now seen corresponding path program 4 times [2024-06-03 19:53:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457571424] [2024-06-03 19:53:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:34,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457571424] [2024-06-03 19:53:34,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457571424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:34,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460406181] [2024-06-03 19:53:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:34,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:34,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 240 transitions, 3849 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:34,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:34,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:34,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:35,383 INFO L124 PetriNetUnfolderBase]: 5093/8106 cut-off events. [2024-06-03 19:53:35,383 INFO L125 PetriNetUnfolderBase]: For 155369/155369 co-relation queries the response was YES. [2024-06-03 19:53:35,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52111 conditions, 8106 events. 5093/8106 cut-off events. For 155369/155369 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 51986 event pairs, 2553 based on Foata normal form. 8/8113 useless extension candidates. Maximal degree in co-relation 52037. Up to 7783 conditions per place. [2024-06-03 19:53:35,464 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 36 changer transitions 0/270 dead transitions. [2024-06-03 19:53:35,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 270 transitions, 4592 flow [2024-06-03 19:53:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:53:35,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 19:53:35,466 INFO L175 Difference]: Start difference. First operand has 150 places, 240 transitions, 3849 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:53:35,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 270 transitions, 4592 flow [2024-06-03 19:53:35,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 270 transitions, 4461 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:35,734 INFO L231 Difference]: Finished difference. Result has 153 places, 244 transitions, 3912 flow [2024-06-03 19:53:35,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3718, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3912, PETRI_PLACES=153, PETRI_TRANSITIONS=244} [2024-06-03 19:53:35,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-03 19:53:35,735 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 244 transitions, 3912 flow [2024-06-03 19:53:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-03 19:53:35,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:35,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:35,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:53:35,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:35,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash -806511641, now seen corresponding path program 3 times [2024-06-03 19:53:35,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:35,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841497258] [2024-06-03 19:53:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:35,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:36,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:36,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841497258] [2024-06-03 19:53:36,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841497258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:36,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:36,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:36,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535493222] [2024-06-03 19:53:36,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:36,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:36,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:36,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:36,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:36,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 244 transitions, 3912 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:36,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:36,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:36,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:37,439 INFO L124 PetriNetUnfolderBase]: 5084/8093 cut-off events. [2024-06-03 19:53:37,440 INFO L125 PetriNetUnfolderBase]: For 160040/160040 co-relation queries the response was YES. [2024-06-03 19:53:37,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52198 conditions, 8093 events. 5084/8093 cut-off events. For 160040/160040 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51852 event pairs, 2566 based on Foata normal form. 3/8095 useless extension candidates. Maximal degree in co-relation 52123. Up to 7904 conditions per place. [2024-06-03 19:53:37,538 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 14 changer transitions 0/254 dead transitions. [2024-06-03 19:53:37,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 254 transitions, 4447 flow [2024-06-03 19:53:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 19:53:37,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-03 19:53:37,539 INFO L175 Difference]: Start difference. First operand has 153 places, 244 transitions, 3912 flow. Second operand 6 states and 97 transitions. [2024-06-03 19:53:37,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 254 transitions, 4447 flow [2024-06-03 19:53:37,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 254 transitions, 4301 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:37,822 INFO L231 Difference]: Finished difference. Result has 153 places, 244 transitions, 3802 flow [2024-06-03 19:53:37,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3802, PETRI_PLACES=153, PETRI_TRANSITIONS=244} [2024-06-03 19:53:37,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-03 19:53:37,823 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 244 transitions, 3802 flow [2024-06-03 19:53:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:37,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:37,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:53:37,824 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)] === [2024-06-03 19:53:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1289842187, now seen corresponding path program 1 times [2024-06-03 19:53:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212316054] [2024-06-03 19:53:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:38,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:38,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212316054] [2024-06-03 19:53:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212316054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:38,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:38,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:38,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662160625] [2024-06-03 19:53:38,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:38,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:38,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:38,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:38,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 244 transitions, 3802 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:38,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:38,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:38,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:39,557 INFO L124 PetriNetUnfolderBase]: 5099/8112 cut-off events. [2024-06-03 19:53:39,557 INFO L125 PetriNetUnfolderBase]: For 162351/162351 co-relation queries the response was YES. [2024-06-03 19:53:39,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52137 conditions, 8112 events. 5099/8112 cut-off events. For 162351/162351 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51947 event pairs, 2574 based on Foata normal form. 3/8114 useless extension candidates. Maximal degree in co-relation 52061. Up to 7892 conditions per place. [2024-06-03 19:53:39,629 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 20 changer transitions 0/267 dead transitions. [2024-06-03 19:53:39,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 267 transitions, 4496 flow [2024-06-03 19:53:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:53:39,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-03 19:53:39,631 INFO L175 Difference]: Start difference. First operand has 153 places, 244 transitions, 3802 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:53:39,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 267 transitions, 4496 flow [2024-06-03 19:53:39,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 267 transitions, 4445 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:39,910 INFO L231 Difference]: Finished difference. Result has 155 places, 250 transitions, 3855 flow [2024-06-03 19:53:39,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3855, PETRI_PLACES=155, PETRI_TRANSITIONS=250} [2024-06-03 19:53:39,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-03 19:53:39,911 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 250 transitions, 3855 flow [2024-06-03 19:53:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:39,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:39,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:53:39,912 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)] === [2024-06-03 19:53:39,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash -773437679, now seen corresponding path program 2 times [2024-06-03 19:53:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:39,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198976053] [2024-06-03 19:53:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:39,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198976053] [2024-06-03 19:53:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198976053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:40,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417275091] [2024-06-03 19:53:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:40,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:40,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 250 transitions, 3855 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:40,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:40,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:40,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:41,653 INFO L124 PetriNetUnfolderBase]: 5090/8101 cut-off events. [2024-06-03 19:53:41,654 INFO L125 PetriNetUnfolderBase]: For 169604/169606 co-relation queries the response was YES. [2024-06-03 19:53:41,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52819 conditions, 8101 events. 5090/8101 cut-off events. For 169604/169606 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51896 event pairs, 2575 based on Foata normal form. 5/8105 useless extension candidates. Maximal degree in co-relation 52743. Up to 7885 conditions per place. [2024-06-03 19:53:41,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 20 changer transitions 0/262 dead transitions. [2024-06-03 19:53:41,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 262 transitions, 4415 flow [2024-06-03 19:53:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 19:53:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-03 19:53:41,728 INFO L175 Difference]: Start difference. First operand has 155 places, 250 transitions, 3855 flow. Second operand 7 states and 110 transitions. [2024-06-03 19:53:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 262 transitions, 4415 flow [2024-06-03 19:53:42,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 262 transitions, 4366 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:42,029 INFO L231 Difference]: Finished difference. Result has 159 places, 250 transitions, 3853 flow [2024-06-03 19:53:42,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3853, PETRI_PLACES=159, PETRI_TRANSITIONS=250} [2024-06-03 19:53:42,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 19:53:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 250 transitions, 3853 flow [2024-06-03 19:53:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:42,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:42,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:53:42,030 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)] === [2024-06-03 19:53:42,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1783208363, now seen corresponding path program 1 times [2024-06-03 19:53:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:42,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30838960] [2024-06-03 19:53:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:42,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30838960] [2024-06-03 19:53:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30838960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:42,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:42,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632552264] [2024-06-03 19:53:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:42,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:42,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 250 transitions, 3853 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:42,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:42,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:42,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:43,772 INFO L124 PetriNetUnfolderBase]: 5163/8180 cut-off events. [2024-06-03 19:53:43,772 INFO L125 PetriNetUnfolderBase]: For 178009/178033 co-relation queries the response was YES. [2024-06-03 19:53:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53313 conditions, 8180 events. 5163/8180 cut-off events. For 178009/178033 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52208 event pairs, 2093 based on Foata normal form. 30/8209 useless extension candidates. Maximal degree in co-relation 53235. Up to 7781 conditions per place. [2024-06-03 19:53:43,850 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 263 selfloop transitions, 51 changer transitions 0/317 dead transitions. [2024-06-03 19:53:43,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 317 transitions, 5168 flow [2024-06-03 19:53:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:53:43,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-03 19:53:43,852 INFO L175 Difference]: Start difference. First operand has 159 places, 250 transitions, 3853 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:53:43,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 317 transitions, 5168 flow [2024-06-03 19:53:44,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 317 transitions, 5100 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:53:44,255 INFO L231 Difference]: Finished difference. Result has 164 places, 284 transitions, 4377 flow [2024-06-03 19:53:44,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4377, PETRI_PLACES=164, PETRI_TRANSITIONS=284} [2024-06-03 19:53:44,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-03 19:53:44,256 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 284 transitions, 4377 flow [2024-06-03 19:53:44,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:44,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:44,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:53:44,256 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)] === [2024-06-03 19:53:44,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1898902936, now seen corresponding path program 1 times [2024-06-03 19:53:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:44,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704735893] [2024-06-03 19:53:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:44,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704735893] [2024-06-03 19:53:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704735893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:45,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:45,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081250664] [2024-06-03 19:53:45,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:45,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:45,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 284 transitions, 4377 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:53:45,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:45,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:46,598 INFO L124 PetriNetUnfolderBase]: 5269/8338 cut-off events. [2024-06-03 19:53:46,599 INFO L125 PetriNetUnfolderBase]: For 190725/190751 co-relation queries the response was YES. [2024-06-03 19:53:46,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56608 conditions, 8338 events. 5269/8338 cut-off events. For 190725/190751 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 53135 event pairs, 1982 based on Foata normal form. 30/8367 useless extension candidates. Maximal degree in co-relation 56526. Up to 7689 conditions per place. [2024-06-03 19:53:46,688 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 255 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-03 19:53:46,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 346 transitions, 5703 flow [2024-06-03 19:53:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:53:46,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:53:46,690 INFO L175 Difference]: Start difference. First operand has 164 places, 284 transitions, 4377 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:53:46,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 346 transitions, 5703 flow [2024-06-03 19:53:47,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 346 transitions, 5625 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-03 19:53:47,146 INFO L231 Difference]: Finished difference. Result has 175 places, 307 transitions, 5007 flow [2024-06-03 19:53:47,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5007, PETRI_PLACES=175, PETRI_TRANSITIONS=307} [2024-06-03 19:53:47,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-03 19:53:47,147 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 307 transitions, 5007 flow [2024-06-03 19:53:47,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:53:47,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:47,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:53:47,147 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)] === [2024-06-03 19:53:47,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1756060636, now seen corresponding path program 2 times [2024-06-03 19:53:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515743727] [2024-06-03 19:53:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:47,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515743727] [2024-06-03 19:53:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515743727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:48,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:48,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711169982] [2024-06-03 19:53:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:48,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:48,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:48,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 307 transitions, 5007 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:53:48,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:48,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:48,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:49,764 INFO L124 PetriNetUnfolderBase]: 5346/8457 cut-off events. [2024-06-03 19:53:49,764 INFO L125 PetriNetUnfolderBase]: For 203475/203491 co-relation queries the response was YES. [2024-06-03 19:53:49,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59001 conditions, 8457 events. 5346/8457 cut-off events. For 203475/203491 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53989 event pairs, 2011 based on Foata normal form. 20/8476 useless extension candidates. Maximal degree in co-relation 58913. Up to 7777 conditions per place. [2024-06-03 19:53:49,859 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 254 selfloop transitions, 106 changer transitions 0/363 dead transitions. [2024-06-03 19:53:49,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 363 transitions, 6329 flow [2024-06-03 19:53:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:53:49,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-03 19:53:49,860 INFO L175 Difference]: Start difference. First operand has 175 places, 307 transitions, 5007 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:53:49,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 363 transitions, 6329 flow [2024-06-03 19:53:50,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 363 transitions, 6174 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:50,272 INFO L231 Difference]: Finished difference. Result has 183 places, 328 transitions, 5624 flow [2024-06-03 19:53:50,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5624, PETRI_PLACES=183, PETRI_TRANSITIONS=328} [2024-06-03 19:53:50,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-03 19:53:50,273 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 328 transitions, 5624 flow [2024-06-03 19:53:50,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:53:50,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:50,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:50,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:53:50,274 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)] === [2024-06-03 19:53:50,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1761632266, now seen corresponding path program 3 times [2024-06-03 19:53:50,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:50,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348301655] [2024-06-03 19:53:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:50,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348301655] [2024-06-03 19:53:51,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348301655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:51,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:51,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467493452] [2024-06-03 19:53:51,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:51,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:51,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 328 transitions, 5624 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:53:51,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:51,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:51,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:52,805 INFO L124 PetriNetUnfolderBase]: 5398/8536 cut-off events. [2024-06-03 19:53:52,806 INFO L125 PetriNetUnfolderBase]: For 216996/217020 co-relation queries the response was YES. [2024-06-03 19:53:52,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60432 conditions, 8536 events. 5398/8536 cut-off events. For 216996/217020 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54493 event pairs, 1976 based on Foata normal form. 28/8563 useless extension candidates. Maximal degree in co-relation 60341. Up to 7691 conditions per place. [2024-06-03 19:53:52,873 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 259 selfloop transitions, 112 changer transitions 0/374 dead transitions. [2024-06-03 19:53:52,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 374 transitions, 6820 flow [2024-06-03 19:53:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:53:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:53:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:53:52,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-03 19:53:52,875 INFO L175 Difference]: Start difference. First operand has 183 places, 328 transitions, 5624 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:53:52,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 374 transitions, 6820 flow [2024-06-03 19:53:53,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 374 transitions, 6645 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:53,308 INFO L231 Difference]: Finished difference. Result has 189 places, 339 transitions, 5968 flow [2024-06-03 19:53:53,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5968, PETRI_PLACES=189, PETRI_TRANSITIONS=339} [2024-06-03 19:53:53,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-03 19:53:53,309 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 339 transitions, 5968 flow [2024-06-03 19:53:53,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:53:53,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:53,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:53,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:53:53,309 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)] === [2024-06-03 19:53:53,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1993482975, now seen corresponding path program 2 times [2024-06-03 19:53:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:53,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719709779] [2024-06-03 19:53:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:53,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719709779] [2024-06-03 19:53:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719709779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:53,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183711742] [2024-06-03 19:53:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:53,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:53,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:53,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 339 transitions, 5968 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:53,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:53,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:53,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:55,331 INFO L124 PetriNetUnfolderBase]: 5554/8758 cut-off events. [2024-06-03 19:53:55,331 INFO L125 PetriNetUnfolderBase]: For 237041/237059 co-relation queries the response was YES. [2024-06-03 19:53:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62837 conditions, 8758 events. 5554/8758 cut-off events. For 237041/237059 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 56118 event pairs, 2155 based on Foata normal form. 24/8781 useless extension candidates. Maximal degree in co-relation 62744. Up to 8213 conditions per place. [2024-06-03 19:53:55,411 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 319 selfloop transitions, 78 changer transitions 0/400 dead transitions. [2024-06-03 19:53:55,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 400 transitions, 7484 flow [2024-06-03 19:53:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:53:55,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-03 19:53:55,413 INFO L175 Difference]: Start difference. First operand has 189 places, 339 transitions, 5968 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:53:55,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 400 transitions, 7484 flow [2024-06-03 19:53:55,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 400 transitions, 7332 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:55,984 INFO L231 Difference]: Finished difference. Result has 196 places, 368 transitions, 6444 flow [2024-06-03 19:53:55,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6444, PETRI_PLACES=196, PETRI_TRANSITIONS=368} [2024-06-03 19:53:55,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-03 19:53:55,985 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 368 transitions, 6444 flow [2024-06-03 19:53:55,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:55,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:55,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:55,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:53:55,985 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)] === [2024-06-03 19:53:55,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:55,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1402400085, now seen corresponding path program 3 times [2024-06-03 19:53:55,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:55,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121078122] [2024-06-03 19:53:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:55,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121078122] [2024-06-03 19:53:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121078122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:56,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:56,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613454815] [2024-06-03 19:53:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:56,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:56,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 368 transitions, 6444 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:56,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:56,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:56,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:58,095 INFO L124 PetriNetUnfolderBase]: 5542/8746 cut-off events. [2024-06-03 19:53:58,095 INFO L125 PetriNetUnfolderBase]: For 245644/245670 co-relation queries the response was YES. [2024-06-03 19:53:58,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63988 conditions, 8746 events. 5542/8746 cut-off events. For 245644/245670 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 56047 event pairs, 2143 based on Foata normal form. 32/8777 useless extension candidates. Maximal degree in co-relation 63890. Up to 8209 conditions per place. [2024-06-03 19:53:58,190 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 317 selfloop transitions, 74 changer transitions 0/394 dead transitions. [2024-06-03 19:53:58,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 394 transitions, 7515 flow [2024-06-03 19:53:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:53:58,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 19:53:58,192 INFO L175 Difference]: Start difference. First operand has 196 places, 368 transitions, 6444 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:53:58,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 394 transitions, 7515 flow [2024-06-03 19:53:58,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 394 transitions, 7399 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-03 19:53:58,784 INFO L231 Difference]: Finished difference. Result has 203 places, 369 transitions, 6538 flow [2024-06-03 19:53:58,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6538, PETRI_PLACES=203, PETRI_TRANSITIONS=369} [2024-06-03 19:53:58,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-03 19:53:58,785 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 369 transitions, 6538 flow [2024-06-03 19:53:58,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:58,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:58,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:53:58,785 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:58,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1025176589, now seen corresponding path program 4 times [2024-06-03 19:53:58,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:58,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292250087] [2024-06-03 19:53:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:59,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292250087] [2024-06-03 19:53:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292250087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:59,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:59,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:59,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712699409] [2024-06-03 19:53:59,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:59,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:59,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 369 transitions, 6538 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:53:59,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:59,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:59,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:00,974 INFO L124 PetriNetUnfolderBase]: 5636/8873 cut-off events. [2024-06-03 19:54:00,975 INFO L125 PetriNetUnfolderBase]: For 260232/260252 co-relation queries the response was YES. [2024-06-03 19:54:01,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65648 conditions, 8873 events. 5636/8873 cut-off events. For 260232/260252 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 56820 event pairs, 2161 based on Foata normal form. 26/8898 useless extension candidates. Maximal degree in co-relation 65547. Up to 8239 conditions per place. [2024-06-03 19:54:01,085 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 308 selfloop transitions, 101 changer transitions 0/412 dead transitions. [2024-06-03 19:54:01,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 412 transitions, 7876 flow [2024-06-03 19:54:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:54:01,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-03 19:54:01,087 INFO L175 Difference]: Start difference. First operand has 203 places, 369 transitions, 6538 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:54:01,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 412 transitions, 7876 flow [2024-06-03 19:54:01,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 412 transitions, 7702 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:01,727 INFO L231 Difference]: Finished difference. Result has 207 places, 385 transitions, 6962 flow [2024-06-03 19:54:01,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6962, PETRI_PLACES=207, PETRI_TRANSITIONS=385} [2024-06-03 19:54:01,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 19:54:01,732 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 385 transitions, 6962 flow [2024-06-03 19:54:01,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:01,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:01,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:01,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:54:01,733 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)] === [2024-06-03 19:54:01,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:01,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1400408214, now seen corresponding path program 4 times [2024-06-03 19:54:01,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:01,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853752729] [2024-06-03 19:54:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:01,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853752729] [2024-06-03 19:54:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853752729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:02,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:02,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:02,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885508429] [2024-06-03 19:54:02,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:02,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:02,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 385 transitions, 6962 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:02,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:02,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:02,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:04,449 INFO L124 PetriNetUnfolderBase]: 5793/9125 cut-off events. [2024-06-03 19:54:04,449 INFO L125 PetriNetUnfolderBase]: For 285743/285769 co-relation queries the response was YES. [2024-06-03 19:54:04,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69528 conditions, 9125 events. 5793/9125 cut-off events. For 285743/285769 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 58680 event pairs, 2080 based on Foata normal form. 34/9158 useless extension candidates. Maximal degree in co-relation 69425. Up to 8316 conditions per place. [2024-06-03 19:54:04,714 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 138 changer transitions 0/455 dead transitions. [2024-06-03 19:54:04,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 455 transitions, 8935 flow [2024-06-03 19:54:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:54:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:54:04,715 INFO L175 Difference]: Start difference. First operand has 207 places, 385 transitions, 6962 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:54:04,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 455 transitions, 8935 flow [2024-06-03 19:54:05,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 455 transitions, 8829 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:05,350 INFO L231 Difference]: Finished difference. Result has 213 places, 421 transitions, 8081 flow [2024-06-03 19:54:05,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8081, PETRI_PLACES=213, PETRI_TRANSITIONS=421} [2024-06-03 19:54:05,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-03 19:54:05,352 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 421 transitions, 8081 flow [2024-06-03 19:54:05,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:05,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:05,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:05,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:54:05,353 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)] === [2024-06-03 19:54:05,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1608416600, now seen corresponding path program 5 times [2024-06-03 19:54:05,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:05,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884855798] [2024-06-03 19:54:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:06,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884855798] [2024-06-03 19:54:06,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884855798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:06,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:06,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:06,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090634824] [2024-06-03 19:54:06,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:06,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:06,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:06,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:06,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:06,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 421 transitions, 8081 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:06,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:06,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:06,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:08,066 INFO L124 PetriNetUnfolderBase]: 5838/9178 cut-off events. [2024-06-03 19:54:08,067 INFO L125 PetriNetUnfolderBase]: For 279071/279091 co-relation queries the response was YES. [2024-06-03 19:54:08,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70170 conditions, 9178 events. 5838/9178 cut-off events. For 279071/279091 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58849 event pairs, 2078 based on Foata normal form. 30/9207 useless extension candidates. Maximal degree in co-relation 70065. Up to 8383 conditions per place. [2024-06-03 19:54:08,181 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 311 selfloop transitions, 149 changer transitions 0/463 dead transitions. [2024-06-03 19:54:08,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 463 transitions, 9395 flow [2024-06-03 19:54:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:54:08,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-03 19:54:08,183 INFO L175 Difference]: Start difference. First operand has 213 places, 421 transitions, 8081 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:54:08,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 463 transitions, 9395 flow [2024-06-03 19:54:08,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 463 transitions, 9104 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:08,945 INFO L231 Difference]: Finished difference. Result has 217 places, 427 transitions, 8301 flow [2024-06-03 19:54:08,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8301, PETRI_PLACES=217, PETRI_TRANSITIONS=427} [2024-06-03 19:54:08,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-03 19:54:08,946 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 427 transitions, 8301 flow [2024-06-03 19:54:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:08,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:08,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:54:08,947 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:08,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1400198964, now seen corresponding path program 6 times [2024-06-03 19:54:08,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:08,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985963644] [2024-06-03 19:54:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:08,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985963644] [2024-06-03 19:54:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985963644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:09,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:09,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:09,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271733689] [2024-06-03 19:54:09,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:09,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:09,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:09,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:09,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:09,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 427 transitions, 8301 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:09,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:09,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:09,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:11,636 INFO L124 PetriNetUnfolderBase]: 5888/9267 cut-off events. [2024-06-03 19:54:11,636 INFO L125 PetriNetUnfolderBase]: For 298648/298674 co-relation queries the response was YES. [2024-06-03 19:54:11,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71289 conditions, 9267 events. 5888/9267 cut-off events. For 298648/298674 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 59708 event pairs, 2016 based on Foata normal form. 34/9300 useless extension candidates. Maximal degree in co-relation 71184. Up to 8032 conditions per place. [2024-06-03 19:54:11,747 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 168 changer transitions 0/468 dead transitions. [2024-06-03 19:54:11,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 468 transitions, 9688 flow [2024-06-03 19:54:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:54:11,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:54:11,748 INFO L175 Difference]: Start difference. First operand has 217 places, 427 transitions, 8301 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:54:11,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 468 transitions, 9688 flow [2024-06-03 19:54:12,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 468 transitions, 9291 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:12,627 INFO L231 Difference]: Finished difference. Result has 221 places, 437 transitions, 8632 flow [2024-06-03 19:54:12,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8632, PETRI_PLACES=221, PETRI_TRANSITIONS=437} [2024-06-03 19:54:12,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 19:54:12,627 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 437 transitions, 8632 flow [2024-06-03 19:54:12,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:12,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:12,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:12,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:54:12,628 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)] === [2024-06-03 19:54:12,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1024878059, now seen corresponding path program 5 times [2024-06-03 19:54:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237637810] [2024-06-03 19:54:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:13,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237637810] [2024-06-03 19:54:13,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237637810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:13,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:13,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:13,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009947482] [2024-06-03 19:54:13,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:13,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:13,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:13,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:13,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:13,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:13,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 437 transitions, 8632 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:13,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:13,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:13,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:15,022 INFO L124 PetriNetUnfolderBase]: 5972/9384 cut-off events. [2024-06-03 19:54:15,022 INFO L125 PetriNetUnfolderBase]: For 312049/312075 co-relation queries the response was YES. [2024-06-03 19:54:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73379 conditions, 9384 events. 5972/9384 cut-off events. For 312049/312075 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 60491 event pairs, 2232 based on Foata normal form. 32/9415 useless extension candidates. Maximal degree in co-relation 73272. Up to 8682 conditions per place. [2024-06-03 19:54:15,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 101 changer transitions 0/475 dead transitions. [2024-06-03 19:54:15,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 475 transitions, 10080 flow [2024-06-03 19:54:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:54:15,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 19:54:15,143 INFO L175 Difference]: Start difference. First operand has 221 places, 437 transitions, 8632 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:54:15,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 475 transitions, 10080 flow [2024-06-03 19:54:16,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 475 transitions, 9832 flow, removed 83 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:16,109 INFO L231 Difference]: Finished difference. Result has 226 places, 451 transitions, 8914 flow [2024-06-03 19:54:16,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8914, PETRI_PLACES=226, PETRI_TRANSITIONS=451} [2024-06-03 19:54:16,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-03 19:54:16,110 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 451 transitions, 8914 flow [2024-06-03 19:54:16,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:16,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:16,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:16,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:54:16,111 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:16,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -690892146, now seen corresponding path program 7 times [2024-06-03 19:54:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:16,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111649819] [2024-06-03 19:54:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:16,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:16,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:16,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111649819] [2024-06-03 19:54:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111649819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:16,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:16,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:16,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051040525] [2024-06-03 19:54:16,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:16,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:17,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:17,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 451 transitions, 8914 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:17,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:17,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:17,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:18,860 INFO L124 PetriNetUnfolderBase]: 6022/9454 cut-off events. [2024-06-03 19:54:18,861 INFO L125 PetriNetUnfolderBase]: For 324805/324825 co-relation queries the response was YES. [2024-06-03 19:54:18,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74516 conditions, 9454 events. 6022/9454 cut-off events. For 324805/324825 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 60894 event pairs, 2097 based on Foata normal form. 28/9481 useless extension candidates. Maximal degree in co-relation 74406. Up to 8529 conditions per place. [2024-06-03 19:54:18,979 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 158 changer transitions 0/484 dead transitions. [2024-06-03 19:54:18,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 484 transitions, 10214 flow [2024-06-03 19:54:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:54:18,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-03 19:54:18,980 INFO L175 Difference]: Start difference. First operand has 226 places, 451 transitions, 8914 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:54:18,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 484 transitions, 10214 flow [2024-06-03 19:54:19,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 484 transitions, 10056 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:19,850 INFO L231 Difference]: Finished difference. Result has 229 places, 456 transitions, 9318 flow [2024-06-03 19:54:19,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8756, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9318, PETRI_PLACES=229, PETRI_TRANSITIONS=456} [2024-06-03 19:54:19,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 19:54:19,851 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 456 transitions, 9318 flow [2024-06-03 19:54:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:19,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:19,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:19,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:54:19,852 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:19,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1591292682, now seen corresponding path program 8 times [2024-06-03 19:54:19,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:19,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506228317] [2024-06-03 19:54:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:19,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:20,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:20,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506228317] [2024-06-03 19:54:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506228317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:20,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:20,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3285433] [2024-06-03 19:54:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:20,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:20,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 456 transitions, 9318 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:20,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:20,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:20,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:22,573 INFO L124 PetriNetUnfolderBase]: 6014/9431 cut-off events. [2024-06-03 19:54:22,573 INFO L125 PetriNetUnfolderBase]: For 327818/327820 co-relation queries the response was YES. [2024-06-03 19:54:22,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74967 conditions, 9431 events. 6014/9431 cut-off events. For 327818/327820 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 60308 event pairs, 2633 based on Foata normal form. 4/9434 useless extension candidates. Maximal degree in co-relation 74857. Up to 9182 conditions per place. [2024-06-03 19:54:22,687 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 458 selfloop transitions, 18 changer transitions 0/479 dead transitions. [2024-06-03 19:54:22,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 479 transitions, 10398 flow [2024-06-03 19:54:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:54:22,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 19:54:22,688 INFO L175 Difference]: Start difference. First operand has 229 places, 456 transitions, 9318 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:54:22,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 479 transitions, 10398 flow [2024-06-03 19:54:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 479 transitions, 10015 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:23,640 INFO L231 Difference]: Finished difference. Result has 231 places, 458 transitions, 9026 flow [2024-06-03 19:54:23,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8935, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9026, PETRI_PLACES=231, PETRI_TRANSITIONS=458} [2024-06-03 19:54:23,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-03 19:54:23,641 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 458 transitions, 9026 flow [2024-06-03 19:54:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:23,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:23,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:23,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:54:23,642 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:23,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash -690884706, now seen corresponding path program 9 times [2024-06-03 19:54:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:23,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225194324] [2024-06-03 19:54:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:24,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:24,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225194324] [2024-06-03 19:54:24,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225194324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:24,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:24,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:24,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544773732] [2024-06-03 19:54:24,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:24,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:24,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:24,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:24,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 458 transitions, 9026 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:24,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:24,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:24,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:26,324 INFO L124 PetriNetUnfolderBase]: 5991/9414 cut-off events. [2024-06-03 19:54:26,325 INFO L125 PetriNetUnfolderBase]: For 329714/329740 co-relation queries the response was YES. [2024-06-03 19:54:26,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73736 conditions, 9414 events. 5991/9414 cut-off events. For 329714/329740 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 60640 event pairs, 2035 based on Foata normal form. 34/9447 useless extension candidates. Maximal degree in co-relation 73625. Up to 8024 conditions per place. [2024-06-03 19:54:26,447 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 308 selfloop transitions, 175 changer transitions 0/486 dead transitions. [2024-06-03 19:54:26,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 486 transitions, 10287 flow [2024-06-03 19:54:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:54:26,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-03 19:54:26,449 INFO L175 Difference]: Start difference. First operand has 231 places, 458 transitions, 9026 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:54:26,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 486 transitions, 10287 flow [2024-06-03 19:54:27,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 486 transitions, 10214 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:27,510 INFO L231 Difference]: Finished difference. Result has 233 places, 463 transitions, 9541 flow [2024-06-03 19:54:27,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8953, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9541, PETRI_PLACES=233, PETRI_TRANSITIONS=463} [2024-06-03 19:54:27,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-03 19:54:27,511 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 463 transitions, 9541 flow [2024-06-03 19:54:27,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:27,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:27,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:27,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:54:27,512 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:27,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1582095912, now seen corresponding path program 10 times [2024-06-03 19:54:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548395766] [2024-06-03 19:54:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:27,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:28,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:28,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548395766] [2024-06-03 19:54:28,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548395766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:28,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:28,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380445260] [2024-06-03 19:54:28,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:28,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:28,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:28,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:28,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 463 transitions, 9541 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:28,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:28,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:28,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:30,170 INFO L124 PetriNetUnfolderBase]: 6030/9480 cut-off events. [2024-06-03 19:54:30,171 INFO L125 PetriNetUnfolderBase]: For 352191/352217 co-relation queries the response was YES. [2024-06-03 19:54:30,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75742 conditions, 9480 events. 6030/9480 cut-off events. For 352191/352217 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 61239 event pairs, 1967 based on Foata normal form. 32/9511 useless extension candidates. Maximal degree in co-relation 75630. Up to 7920 conditions per place. [2024-06-03 19:54:30,298 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 198 changer transitions 0/497 dead transitions. [2024-06-03 19:54:30,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 497 transitions, 11001 flow [2024-06-03 19:54:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:54:30,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-03 19:54:30,300 INFO L175 Difference]: Start difference. First operand has 233 places, 463 transitions, 9541 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:54:30,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 497 transitions, 11001 flow [2024-06-03 19:54:31,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 497 transitions, 10516 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:31,403 INFO L231 Difference]: Finished difference. Result has 235 places, 471 transitions, 9716 flow [2024-06-03 19:54:31,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9060, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9716, PETRI_PLACES=235, PETRI_TRANSITIONS=471} [2024-06-03 19:54:31,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-03 19:54:31,404 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 471 transitions, 9716 flow [2024-06-03 19:54:31,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:31,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:31,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:54:31,405 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:31,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1243291142, now seen corresponding path program 11 times [2024-06-03 19:54:31,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:31,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522740172] [2024-06-03 19:54:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:32,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522740172] [2024-06-03 19:54:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522740172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:32,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:32,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:32,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342425308] [2024-06-03 19:54:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:32,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:32,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 471 transitions, 9716 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:32,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:32,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:34,057 INFO L124 PetriNetUnfolderBase]: 6012/9446 cut-off events. [2024-06-03 19:54:34,058 INFO L125 PetriNetUnfolderBase]: For 339905/339925 co-relation queries the response was YES. [2024-06-03 19:54:34,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75142 conditions, 9446 events. 6012/9446 cut-off events. For 339905/339925 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 60868 event pairs, 2041 based on Foata normal form. 26/9471 useless extension candidates. Maximal degree in co-relation 75029. Up to 8450 conditions per place. [2024-06-03 19:54:34,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 174 changer transitions 0/501 dead transitions. [2024-06-03 19:54:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 501 transitions, 10877 flow [2024-06-03 19:54:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:54:34,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-03 19:54:34,175 INFO L175 Difference]: Start difference. First operand has 235 places, 471 transitions, 9716 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:54:34,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 501 transitions, 10877 flow [2024-06-03 19:54:35,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 501 transitions, 10619 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:35,432 INFO L231 Difference]: Finished difference. Result has 239 places, 471 transitions, 9855 flow [2024-06-03 19:54:35,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9855, PETRI_PLACES=239, PETRI_TRANSITIONS=471} [2024-06-03 19:54:35,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-03 19:54:35,433 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 471 transitions, 9855 flow [2024-06-03 19:54:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-03 19:54:35,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:35,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:35,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:54:35,434 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)] === [2024-06-03 19:54:35,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1014701069, now seen corresponding path program 6 times [2024-06-03 19:54:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:35,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833239387] [2024-06-03 19:54:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:35,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:35,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833239387] [2024-06-03 19:54:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833239387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:35,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854362601] [2024-06-03 19:54:35,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:35,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:35,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:36,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:36,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 471 transitions, 9855 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:36,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:36,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:36,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:37,848 INFO L124 PetriNetUnfolderBase]: 6000/9441 cut-off events. [2024-06-03 19:54:37,848 INFO L125 PetriNetUnfolderBase]: For 344461/344463 co-relation queries the response was YES. [2024-06-03 19:54:37,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75553 conditions, 9441 events. 6000/9441 cut-off events. For 344461/344463 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 61074 event pairs, 2653 based on Foata normal form. 8/9448 useless extension candidates. Maximal degree in co-relation 75438. Up to 9162 conditions per place. [2024-06-03 19:54:37,974 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 32 changer transitions 0/486 dead transitions. [2024-06-03 19:54:37,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 486 transitions, 10972 flow [2024-06-03 19:54:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:54:37,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 19:54:37,975 INFO L175 Difference]: Start difference. First operand has 239 places, 471 transitions, 9855 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:54:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 486 transitions, 10972 flow [2024-06-03 19:54:38,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 486 transitions, 10546 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:38,900 INFO L231 Difference]: Finished difference. Result has 240 places, 471 transitions, 9506 flow [2024-06-03 19:54:38,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9429, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9506, PETRI_PLACES=240, PETRI_TRANSITIONS=471} [2024-06-03 19:54:38,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-03 19:54:38,901 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 471 transitions, 9506 flow [2024-06-03 19:54:38,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:38,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:38,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:54:38,902 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)] === [2024-06-03 19:54:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -17285927, now seen corresponding path program 1 times [2024-06-03 19:54:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444107178] [2024-06-03 19:54:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:39,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444107178] [2024-06-03 19:54:39,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444107178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:39,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:39,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384138660] [2024-06-03 19:54:39,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:39,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:39,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:39,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 471 transitions, 9506 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:39,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:39,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:39,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:41,407 INFO L124 PetriNetUnfolderBase]: 5994/9432 cut-off events. [2024-06-03 19:54:41,407 INFO L125 PetriNetUnfolderBase]: For 342242/342242 co-relation queries the response was YES. [2024-06-03 19:54:41,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74768 conditions, 9432 events. 5994/9432 cut-off events. For 342242/342242 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 60984 event pairs, 2645 based on Foata normal form. 2/9433 useless extension candidates. Maximal degree in co-relation 74652. Up to 9235 conditions per place. [2024-06-03 19:54:41,530 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 467 selfloop transitions, 15 changer transitions 0/485 dead transitions. [2024-06-03 19:54:41,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 485 transitions, 10568 flow [2024-06-03 19:54:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 19:54:41,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-03 19:54:41,532 INFO L175 Difference]: Start difference. First operand has 240 places, 471 transitions, 9506 flow. Second operand 7 states and 109 transitions. [2024-06-03 19:54:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 485 transitions, 10568 flow [2024-06-03 19:54:42,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 485 transitions, 10377 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:42,638 INFO L231 Difference]: Finished difference. Result has 241 places, 474 transitions, 9417 flow [2024-06-03 19:54:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9315, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9417, PETRI_PLACES=241, PETRI_TRANSITIONS=474} [2024-06-03 19:54:42,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-03 19:54:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 474 transitions, 9417 flow [2024-06-03 19:54:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:42,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:42,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:54:42,639 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)] === [2024-06-03 19:54:42,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1592863367, now seen corresponding path program 1 times [2024-06-03 19:54:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693952870] [2024-06-03 19:54:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693952870] [2024-06-03 19:54:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693952870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:43,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:43,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:43,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976177874] [2024-06-03 19:54:43,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:43,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:43,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:43,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 474 transitions, 9417 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:43,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:43,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:43,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:45,129 INFO L124 PetriNetUnfolderBase]: 6024/9474 cut-off events. [2024-06-03 19:54:45,129 INFO L125 PetriNetUnfolderBase]: For 355199/355199 co-relation queries the response was YES. [2024-06-03 19:54:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74905 conditions, 9474 events. 6024/9474 cut-off events. For 355199/355199 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 61188 event pairs, 2655 based on Foata normal form. 6/9479 useless extension candidates. Maximal degree in co-relation 74791. Up to 9243 conditions per place. [2024-06-03 19:54:45,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 475 selfloop transitions, 17 changer transitions 0/495 dead transitions. [2024-06-03 19:54:45,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 495 transitions, 10521 flow [2024-06-03 19:54:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:54:45,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 19:54:45,257 INFO L175 Difference]: Start difference. First operand has 241 places, 474 transitions, 9417 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:54:45,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 495 transitions, 10521 flow [2024-06-03 19:54:46,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 495 transitions, 10347 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:46,449 INFO L231 Difference]: Finished difference. Result has 242 places, 477 transitions, 9330 flow [2024-06-03 19:54:46,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9243, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9330, PETRI_PLACES=242, PETRI_TRANSITIONS=477} [2024-06-03 19:54:46,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 19:54:46,450 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 477 transitions, 9330 flow [2024-06-03 19:54:46,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:46,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:46,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:46,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:54:46,450 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)] === [2024-06-03 19:54:46,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash 761699117, now seen corresponding path program 2 times [2024-06-03 19:54:46,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:46,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687347761] [2024-06-03 19:54:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:47,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:47,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687347761] [2024-06-03 19:54:47,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687347761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:47,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:47,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:47,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009848061] [2024-06-03 19:54:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:47,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:47,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:47,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 477 transitions, 9330 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:47,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:47,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:47,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:48,948 INFO L124 PetriNetUnfolderBase]: 6054/9516 cut-off events. [2024-06-03 19:54:48,948 INFO L125 PetriNetUnfolderBase]: For 364956/364956 co-relation queries the response was YES. [2024-06-03 19:54:49,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75397 conditions, 9516 events. 6054/9516 cut-off events. For 364956/364956 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 61503 event pairs, 2643 based on Foata normal form. 6/9521 useless extension candidates. Maximal degree in co-relation 75283. Up to 9189 conditions per place. [2024-06-03 19:54:49,063 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 470 selfloop transitions, 34 changer transitions 0/507 dead transitions. [2024-06-03 19:54:49,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 507 transitions, 10633 flow [2024-06-03 19:54:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:54:49,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:54:49,078 INFO L175 Difference]: Start difference. First operand has 242 places, 477 transitions, 9330 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:54:49,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 507 transitions, 10633 flow [2024-06-03 19:54:50,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 507 transitions, 10570 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:50,451 INFO L231 Difference]: Finished difference. Result has 245 places, 483 transitions, 9446 flow [2024-06-03 19:54:50,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9446, PETRI_PLACES=245, PETRI_TRANSITIONS=483} [2024-06-03 19:54:50,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-03 19:54:50,452 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 483 transitions, 9446 flow [2024-06-03 19:54:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:50,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:50,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:54:50,453 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)] === [2024-06-03 19:54:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -295289023, now seen corresponding path program 3 times [2024-06-03 19:54:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:50,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344627900] [2024-06-03 19:54:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:51,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:51,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344627900] [2024-06-03 19:54:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344627900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:51,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:51,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:51,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003645172] [2024-06-03 19:54:51,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:51,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:51,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:51,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 483 transitions, 9446 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:51,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:51,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:51,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:53,029 INFO L124 PetriNetUnfolderBase]: 6036/9493 cut-off events. [2024-06-03 19:54:53,030 INFO L125 PetriNetUnfolderBase]: For 371934/371936 co-relation queries the response was YES. [2024-06-03 19:54:53,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75532 conditions, 9493 events. 6036/9493 cut-off events. For 371934/371936 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 61346 event pairs, 2649 based on Foata normal form. 6/9498 useless extension candidates. Maximal degree in co-relation 75417. Up to 9178 conditions per place. [2024-06-03 19:54:53,147 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 34 changer transitions 0/500 dead transitions. [2024-06-03 19:54:53,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 500 transitions, 10515 flow [2024-06-03 19:54:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:54:53,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 19:54:53,155 INFO L175 Difference]: Start difference. First operand has 245 places, 483 transitions, 9446 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:54:53,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 500 transitions, 10515 flow [2024-06-03 19:54:54,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 500 transitions, 10433 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:54,379 INFO L231 Difference]: Finished difference. Result has 249 places, 483 transitions, 9439 flow [2024-06-03 19:54:54,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9364, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9439, PETRI_PLACES=249, PETRI_TRANSITIONS=483} [2024-06-03 19:54:54,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-03 19:54:54,380 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 483 transitions, 9439 flow [2024-06-03 19:54:54,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:54:54,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:54,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:54,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:54:54,381 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:54,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash 768374471, now seen corresponding path program 1 times [2024-06-03 19:54:54,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:54,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695231788] [2024-06-03 19:54:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:55,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695231788] [2024-06-03 19:54:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695231788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:55,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045436977] [2024-06-03 19:54:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:55,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:55,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:55,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 483 transitions, 9439 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:55,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:55,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:57,248 INFO L124 PetriNetUnfolderBase]: 6031/9485 cut-off events. [2024-06-03 19:54:57,249 INFO L125 PetriNetUnfolderBase]: For 375113/375113 co-relation queries the response was YES. [2024-06-03 19:54:57,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75519 conditions, 9485 events. 6031/9485 cut-off events. For 375113/375113 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 61243 event pairs, 2642 based on Foata normal form. 2/9486 useless extension candidates. Maximal degree in co-relation 75402. Up to 9290 conditions per place. [2024-06-03 19:54:57,367 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 479 selfloop transitions, 14 changer transitions 0/496 dead transitions. [2024-06-03 19:54:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 496 transitions, 10499 flow [2024-06-03 19:54:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:54:57,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 19:54:57,369 INFO L175 Difference]: Start difference. First operand has 249 places, 483 transitions, 9439 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:54:57,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 496 transitions, 10499 flow [2024-06-03 19:54:58,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 496 transitions, 10395 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:58,730 INFO L231 Difference]: Finished difference. Result has 249 places, 485 transitions, 9410 flow [2024-06-03 19:54:58,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9335, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9410, PETRI_PLACES=249, PETRI_TRANSITIONS=485} [2024-06-03 19:54:58,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-03 19:54:58,730 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 485 transitions, 9410 flow [2024-06-03 19:54:58,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:58,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:58,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:54:58,731 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:58,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash -22205584, now seen corresponding path program 1 times [2024-06-03 19:54:58,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650394581] [2024-06-03 19:54:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:59,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650394581] [2024-06-03 19:54:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650394581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:59,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636541430] [2024-06-03 19:54:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:59,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:59,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:59,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:59,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 485 transitions, 9410 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-03 19:54:59,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:59,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:59,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:01,212 INFO L124 PetriNetUnfolderBase]: 6068/9506 cut-off events. [2024-06-03 19:55:01,212 INFO L125 PetriNetUnfolderBase]: For 384937/384995 co-relation queries the response was YES. [2024-06-03 19:55:01,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76085 conditions, 9506 events. 6068/9506 cut-off events. For 384937/384995 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 61167 event pairs, 1931 based on Foata normal form. 58/9563 useless extension candidates. Maximal degree in co-relation 75968. Up to 8872 conditions per place. [2024-06-03 19:55:01,337 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 457 selfloop transitions, 99 changer transitions 0/559 dead transitions. [2024-06-03 19:55:01,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 559 transitions, 11478 flow [2024-06-03 19:55:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:55:01,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-03 19:55:01,338 INFO L175 Difference]: Start difference. First operand has 249 places, 485 transitions, 9410 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:55:01,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 559 transitions, 11478 flow [2024-06-03 19:55:02,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 559 transitions, 11419 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:02,713 INFO L231 Difference]: Finished difference. Result has 255 places, 519 transitions, 10222 flow [2024-06-03 19:55:02,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10222, PETRI_PLACES=255, PETRI_TRANSITIONS=519} [2024-06-03 19:55:02,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-03 19:55:02,714 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 519 transitions, 10222 flow [2024-06-03 19:55:02,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2024-06-03 19:55:02,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:02,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:02,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:55:02,714 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:02,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1497266960, now seen corresponding path program 1 times [2024-06-03 19:55:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:02,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900728507] [2024-06-03 19:55:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:03,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:03,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900728507] [2024-06-03 19:55:03,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900728507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:03,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:03,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:03,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285129896] [2024-06-03 19:55:03,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:03,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:03,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:03,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:03,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:03,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 519 transitions, 10222 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:03,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:03,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:03,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:05,397 INFO L124 PetriNetUnfolderBase]: 6146/9629 cut-off events. [2024-06-03 19:55:05,397 INFO L125 PetriNetUnfolderBase]: For 417435/417473 co-relation queries the response was YES. [2024-06-03 19:55:05,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79266 conditions, 9629 events. 6146/9629 cut-off events. For 417435/417473 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 62009 event pairs, 2187 based on Foata normal form. 44/9672 useless extension candidates. Maximal degree in co-relation 79145. Up to 9031 conditions per place. [2024-06-03 19:55:05,523 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 458 selfloop transitions, 102 changer transitions 0/563 dead transitions. [2024-06-03 19:55:05,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 563 transitions, 12077 flow [2024-06-03 19:55:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:55:05,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-03 19:55:05,524 INFO L175 Difference]: Start difference. First operand has 255 places, 519 transitions, 10222 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:55:05,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 563 transitions, 12077 flow [2024-06-03 19:55:06,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 563 transitions, 12017 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 19:55:06,801 INFO L231 Difference]: Finished difference. Result has 261 places, 534 transitions, 10699 flow [2024-06-03 19:55:06,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10699, PETRI_PLACES=261, PETRI_TRANSITIONS=534} [2024-06-03 19:55:06,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 19:55:06,802 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 534 transitions, 10699 flow [2024-06-03 19:55:06,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:06,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:06,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:06,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:55:06,802 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:06,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash -538414703, now seen corresponding path program 1 times [2024-06-03 19:55:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:06,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020379751] [2024-06-03 19:55:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:07,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:07,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020379751] [2024-06-03 19:55:07,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020379751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:07,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:07,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774867815] [2024-06-03 19:55:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:07,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:07,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:07,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:07,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 534 transitions, 10699 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:07,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:07,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:07,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:10,108 INFO L124 PetriNetUnfolderBase]: 6214/9735 cut-off events. [2024-06-03 19:55:10,108 INFO L125 PetriNetUnfolderBase]: For 442730/442750 co-relation queries the response was YES. [2024-06-03 19:55:10,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80776 conditions, 9735 events. 6214/9735 cut-off events. For 442730/442750 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 62705 event pairs, 2018 based on Foata normal form. 36/9770 useless extension candidates. Maximal degree in co-relation 80653. Up to 8900 conditions per place. [2024-06-03 19:55:10,241 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 432 selfloop transitions, 141 changer transitions 0/576 dead transitions. [2024-06-03 19:55:10,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 576 transitions, 12105 flow [2024-06-03 19:55:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:55:10,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-03 19:55:10,243 INFO L175 Difference]: Start difference. First operand has 261 places, 534 transitions, 10699 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:55:10,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 576 transitions, 12105 flow [2024-06-03 19:55:11,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 576 transitions, 11939 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:11,756 INFO L231 Difference]: Finished difference. Result has 267 places, 536 transitions, 10912 flow [2024-06-03 19:55:11,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10533, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10912, PETRI_PLACES=267, PETRI_TRANSITIONS=536} [2024-06-03 19:55:11,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 19:55:11,757 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 536 transitions, 10912 flow [2024-06-03 19:55:11,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:11,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:11,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:11,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:55:11,758 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:11,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1224204697, now seen corresponding path program 2 times [2024-06-03 19:55:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:11,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830049960] [2024-06-03 19:55:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:11,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830049960] [2024-06-03 19:55:12,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830049960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:12,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:12,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:12,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793221070] [2024-06-03 19:55:12,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:12,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:12,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:12,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 536 transitions, 10912 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:12,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:12,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:12,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:15,407 INFO L124 PetriNetUnfolderBase]: 6282/9852 cut-off events. [2024-06-03 19:55:15,407 INFO L125 PetriNetUnfolderBase]: For 467201/467239 co-relation queries the response was YES. [2024-06-03 19:55:15,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82143 conditions, 9852 events. 6282/9852 cut-off events. For 467201/467239 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 63711 event pairs, 2011 based on Foata normal form. 54/9905 useless extension candidates. Maximal degree in co-relation 82019. Up to 8982 conditions per place. [2024-06-03 19:55:15,515 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 149 changer transitions 0/580 dead transitions. [2024-06-03 19:55:15,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 580 transitions, 12356 flow [2024-06-03 19:55:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:55:15,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-03 19:55:15,516 INFO L175 Difference]: Start difference. First operand has 267 places, 536 transitions, 10912 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:55:15,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 580 transitions, 12356 flow [2024-06-03 19:55:16,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 580 transitions, 12070 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:16,921 INFO L231 Difference]: Finished difference. Result has 271 places, 540 transitions, 11098 flow [2024-06-03 19:55:16,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10626, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11098, PETRI_PLACES=271, PETRI_TRANSITIONS=540} [2024-06-03 19:55:16,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-03 19:55:16,921 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 540 transitions, 11098 flow [2024-06-03 19:55:16,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:16,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:16,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:16,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:55:16,922 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:16,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1223974057, now seen corresponding path program 3 times [2024-06-03 19:55:16,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:16,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012627657] [2024-06-03 19:55:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:16,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:17,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:17,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012627657] [2024-06-03 19:55:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012627657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:17,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469888466] [2024-06-03 19:55:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:17,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:18,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 540 transitions, 11098 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:20,357 INFO L124 PetriNetUnfolderBase]: 6289/9870 cut-off events. [2024-06-03 19:55:20,357 INFO L125 PetriNetUnfolderBase]: For 473512/473550 co-relation queries the response was YES. [2024-06-03 19:55:20,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82145 conditions, 9870 events. 6289/9870 cut-off events. For 473512/473550 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 63991 event pairs, 2007 based on Foata normal form. 54/9923 useless extension candidates. Maximal degree in co-relation 82019. Up to 8866 conditions per place. [2024-06-03 19:55:20,488 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 149 changer transitions 0/580 dead transitions. [2024-06-03 19:55:20,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 580 transitions, 12468 flow [2024-06-03 19:55:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-03 19:55:20,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:55:20,490 INFO L175 Difference]: Start difference. First operand has 271 places, 540 transitions, 11098 flow. Second operand 10 states and 180 transitions. [2024-06-03 19:55:20,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 580 transitions, 12468 flow [2024-06-03 19:55:21,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 580 transitions, 12244 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:21,977 INFO L231 Difference]: Finished difference. Result has 275 places, 541 transitions, 11235 flow [2024-06-03 19:55:21,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10874, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11235, PETRI_PLACES=275, PETRI_TRANSITIONS=541} [2024-06-03 19:55:21,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-03 19:55:21,978 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 541 transitions, 11235 flow [2024-06-03 19:55:21,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:21,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:21,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:21,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:55:21,979 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)] === [2024-06-03 19:55:21,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1936219398, now seen corresponding path program 2 times [2024-06-03 19:55:21,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:21,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058874] [2024-06-03 19:55:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058874] [2024-06-03 19:55:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:22,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:22,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500207294] [2024-06-03 19:55:22,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:22,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:22,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 541 transitions, 11235 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:22,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:22,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:24,759 INFO L124 PetriNetUnfolderBase]: 6265/9841 cut-off events. [2024-06-03 19:55:24,759 INFO L125 PetriNetUnfolderBase]: For 467112/467150 co-relation queries the response was YES. [2024-06-03 19:55:24,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81608 conditions, 9841 events. 6265/9841 cut-off events. For 467112/467150 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 63982 event pairs, 2244 based on Foata normal form. 46/9886 useless extension candidates. Maximal degree in co-relation 81481. Up to 9260 conditions per place. [2024-06-03 19:55:24,889 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 460 selfloop transitions, 101 changer transitions 0/564 dead transitions. [2024-06-03 19:55:24,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 564 transitions, 12657 flow [2024-06-03 19:55:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:55:24,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 19:55:24,891 INFO L175 Difference]: Start difference. First operand has 275 places, 541 transitions, 11235 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:55:24,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 564 transitions, 12657 flow [2024-06-03 19:55:26,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 564 transitions, 12264 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-03 19:55:26,420 INFO L231 Difference]: Finished difference. Result has 275 places, 541 transitions, 11064 flow [2024-06-03 19:55:26,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10842, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11064, PETRI_PLACES=275, PETRI_TRANSITIONS=541} [2024-06-03 19:55:26,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-03 19:55:26,421 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 541 transitions, 11064 flow [2024-06-03 19:55:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:26,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:26,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:26,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:55:26,422 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)] === [2024-06-03 19:55:26,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash 793139984, now seen corresponding path program 2 times [2024-06-03 19:55:26,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:26,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197777133] [2024-06-03 19:55:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:26,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197777133] [2024-06-03 19:55:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197777133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:27,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:27,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:27,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634166736] [2024-06-03 19:55:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:27,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:27,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 541 transitions, 11064 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:27,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:27,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:27,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:29,296 INFO L124 PetriNetUnfolderBase]: 6367/9979 cut-off events. [2024-06-03 19:55:29,296 INFO L125 PetriNetUnfolderBase]: For 476589/476621 co-relation queries the response was YES. [2024-06-03 19:55:29,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82534 conditions, 9979 events. 6367/9979 cut-off events. For 476589/476621 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64842 event pairs, 2247 based on Foata normal form. 38/10016 useless extension candidates. Maximal degree in co-relation 82406. Up to 9295 conditions per place. [2024-06-03 19:55:29,437 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 467 selfloop transitions, 132 changer transitions 0/602 dead transitions. [2024-06-03 19:55:29,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 602 transitions, 13082 flow [2024-06-03 19:55:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 19:55:29,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-03 19:55:29,438 INFO L175 Difference]: Start difference. First operand has 275 places, 541 transitions, 11064 flow. Second operand 10 states and 188 transitions. [2024-06-03 19:55:29,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 602 transitions, 13082 flow [2024-06-03 19:55:31,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 602 transitions, 12929 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:31,044 INFO L231 Difference]: Finished difference. Result has 280 places, 566 transitions, 11620 flow [2024-06-03 19:55:31,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10917, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11620, PETRI_PLACES=280, PETRI_TRANSITIONS=566} [2024-06-03 19:55:31,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-03 19:55:31,053 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 566 transitions, 11620 flow [2024-06-03 19:55:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:31,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:31,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:31,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:55:31,054 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)] === [2024-06-03 19:55:31,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1969283440, now seen corresponding path program 3 times [2024-06-03 19:55:31,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845031746] [2024-06-03 19:55:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:31,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:31,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:31,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845031746] [2024-06-03 19:55:31,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845031746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:31,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:31,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224300030] [2024-06-03 19:55:31,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:31,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:31,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:31,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:31,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 566 transitions, 11620 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:31,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:31,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:31,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:33,979 INFO L124 PetriNetUnfolderBase]: 6363/9976 cut-off events. [2024-06-03 19:55:33,980 INFO L125 PetriNetUnfolderBase]: For 475611/475665 co-relation queries the response was YES. [2024-06-03 19:55:34,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83563 conditions, 9976 events. 6363/9976 cut-off events. For 475611/475665 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64845 event pairs, 2234 based on Foata normal form. 56/10031 useless extension candidates. Maximal degree in co-relation 83434. Up to 9532 conditions per place. [2024-06-03 19:55:34,126 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 509 selfloop transitions, 81 changer transitions 0/593 dead transitions. [2024-06-03 19:55:34,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 593 transitions, 13172 flow [2024-06-03 19:55:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:55:34,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 19:55:34,127 INFO L175 Difference]: Start difference. First operand has 280 places, 566 transitions, 11620 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:55:34,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 593 transitions, 13172 flow [2024-06-03 19:55:35,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 593 transitions, 12964 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:35,545 INFO L231 Difference]: Finished difference. Result has 286 places, 571 transitions, 11689 flow [2024-06-03 19:55:35,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11416, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11689, PETRI_PLACES=286, PETRI_TRANSITIONS=571} [2024-06-03 19:55:35,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-03 19:55:35,546 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 571 transitions, 11689 flow [2024-06-03 19:55:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:35,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:35,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:35,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:55:35,547 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)] === [2024-06-03 19:55:35,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:35,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1692363440, now seen corresponding path program 4 times [2024-06-03 19:55:35,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:35,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954085563] [2024-06-03 19:55:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:35,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:36,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954085563] [2024-06-03 19:55:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954085563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:36,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:36,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:36,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982498100] [2024-06-03 19:55:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:36,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:36,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:36,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:36,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 571 transitions, 11689 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:36,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:36,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:36,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:38,616 INFO L124 PetriNetUnfolderBase]: 6425/10062 cut-off events. [2024-06-03 19:55:38,617 INFO L125 PetriNetUnfolderBase]: For 499810/499842 co-relation queries the response was YES. [2024-06-03 19:55:38,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84783 conditions, 10062 events. 6425/10062 cut-off events. For 499810/499842 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 65430 event pairs, 2219 based on Foata normal form. 38/10099 useless extension candidates. Maximal degree in co-relation 84651. Up to 9103 conditions per place. [2024-06-03 19:55:38,970 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 417 selfloop transitions, 198 changer transitions 0/618 dead transitions. [2024-06-03 19:55:38,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 618 transitions, 13509 flow [2024-06-03 19:55:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:55:38,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-03 19:55:38,972 INFO L175 Difference]: Start difference. First operand has 286 places, 571 transitions, 11689 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:55:38,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 618 transitions, 13509 flow [2024-06-03 19:55:40,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 618 transitions, 13355 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:40,424 INFO L231 Difference]: Finished difference. Result has 291 places, 584 transitions, 12254 flow [2024-06-03 19:55:40,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11537, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12254, PETRI_PLACES=291, PETRI_TRANSITIONS=584} [2024-06-03 19:55:40,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-03 19:55:40,425 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 584 transitions, 12254 flow [2024-06-03 19:55:40,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:40,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:40,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:55:40,426 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)] === [2024-06-03 19:55:40,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -792785138, now seen corresponding path program 3 times [2024-06-03 19:55:40,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:40,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839418625] [2024-06-03 19:55:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:41,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:41,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839418625] [2024-06-03 19:55:41,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839418625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:41,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:41,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053082575] [2024-06-03 19:55:41,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:41,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:41,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:41,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 584 transitions, 12254 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:41,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:41,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:41,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:43,429 INFO L124 PetriNetUnfolderBase]: 6509/10183 cut-off events. [2024-06-03 19:55:43,429 INFO L125 PetriNetUnfolderBase]: For 541661/541715 co-relation queries the response was YES. [2024-06-03 19:55:43,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87965 conditions, 10183 events. 6509/10183 cut-off events. For 541661/541715 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 66244 event pairs, 2292 based on Foata normal form. 66/10248 useless extension candidates. Maximal degree in co-relation 87831. Up to 9398 conditions per place. [2024-06-03 19:55:43,564 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 152 changer transitions 0/633 dead transitions. [2024-06-03 19:55:43,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 633 transitions, 14432 flow [2024-06-03 19:55:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:55:43,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-03 19:55:43,566 INFO L175 Difference]: Start difference. First operand has 291 places, 584 transitions, 12254 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:55:43,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 633 transitions, 14432 flow [2024-06-03 19:55:45,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 633 transitions, 14062 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:45,454 INFO L231 Difference]: Finished difference. Result has 294 places, 606 transitions, 12820 flow [2024-06-03 19:55:45,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11918, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12820, PETRI_PLACES=294, PETRI_TRANSITIONS=606} [2024-06-03 19:55:45,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 19:55:45,455 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 606 transitions, 12820 flow [2024-06-03 19:55:45,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:45,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:45,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:45,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:55:45,456 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)] === [2024-06-03 19:55:45,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash -787071218, now seen corresponding path program 4 times [2024-06-03 19:55:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072959709] [2024-06-03 19:55:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:46,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072959709] [2024-06-03 19:55:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072959709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:46,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968633688] [2024-06-03 19:55:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 606 transitions, 12820 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:48,352 INFO L124 PetriNetUnfolderBase]: 6491/10155 cut-off events. [2024-06-03 19:55:48,352 INFO L125 PetriNetUnfolderBase]: For 517030/517084 co-relation queries the response was YES. [2024-06-03 19:55:48,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87085 conditions, 10155 events. 6491/10155 cut-off events. For 517030/517084 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 65960 event pairs, 2229 based on Foata normal form. 60/10214 useless extension candidates. Maximal degree in co-relation 86948. Up to 9387 conditions per place. [2024-06-03 19:55:48,495 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 139 changer transitions 0/630 dead transitions. [2024-06-03 19:55:48,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 630 transitions, 14431 flow [2024-06-03 19:55:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:55:48,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 19:55:48,497 INFO L175 Difference]: Start difference. First operand has 294 places, 606 transitions, 12820 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:55:48,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 630 transitions, 14431 flow [2024-06-03 19:55:50,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 630 transitions, 14201 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:50,151 INFO L231 Difference]: Finished difference. Result has 297 places, 606 transitions, 12906 flow [2024-06-03 19:55:50,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12594, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12906, PETRI_PLACES=297, PETRI_TRANSITIONS=606} [2024-06-03 19:55:50,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-03 19:55:50,152 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 606 transitions, 12906 flow [2024-06-03 19:55:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:55:50,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:50,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:50,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:55:50,152 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:50,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1512458627, now seen corresponding path program 4 times [2024-06-03 19:55:50,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:50,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222570155] [2024-06-03 19:55:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:50,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:51,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222570155] [2024-06-03 19:55:51,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222570155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:51,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:51,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:51,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358473014] [2024-06-03 19:55:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:51,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:51,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:51,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:51,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 606 transitions, 12906 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:51,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:51,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:51,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:53,716 INFO L124 PetriNetUnfolderBase]: 6613/10375 cut-off events. [2024-06-03 19:55:53,716 INFO L125 PetriNetUnfolderBase]: For 558828/558882 co-relation queries the response was YES. [2024-06-03 19:55:53,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88821 conditions, 10375 events. 6613/10375 cut-off events. For 558828/558882 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 67909 event pairs, 2038 based on Foata normal form. 82/10456 useless extension candidates. Maximal degree in co-relation 88684. Up to 9248 conditions per place. [2024-06-03 19:55:53,881 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 491 selfloop transitions, 157 changer transitions 0/651 dead transitions. [2024-06-03 19:55:53,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 651 transitions, 14649 flow [2024-06-03 19:55:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:55:53,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 19:55:53,883 INFO L175 Difference]: Start difference. First operand has 297 places, 606 transitions, 12906 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:55:53,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 651 transitions, 14649 flow [2024-06-03 19:55:56,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 651 transitions, 14429 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:56,130 INFO L231 Difference]: Finished difference. Result has 301 places, 610 transitions, 13205 flow [2024-06-03 19:55:56,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12686, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13205, PETRI_PLACES=301, PETRI_TRANSITIONS=610} [2024-06-03 19:55:56,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-03 19:55:56,131 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 610 transitions, 13205 flow [2024-06-03 19:55:56,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:56,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:56,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:56,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:55:56,132 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:56,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1552697815, now seen corresponding path program 5 times [2024-06-03 19:55:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:56,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877248248] [2024-06-03 19:55:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:57,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:57,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877248248] [2024-06-03 19:55:57,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877248248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:57,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:57,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995350265] [2024-06-03 19:55:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:57,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:57,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:57,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 610 transitions, 13205 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:55:57,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:57,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:57,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:59,893 INFO L124 PetriNetUnfolderBase]: 6735/10581 cut-off events. [2024-06-03 19:55:59,893 INFO L125 PetriNetUnfolderBase]: For 580286/580340 co-relation queries the response was YES. [2024-06-03 19:55:59,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90952 conditions, 10581 events. 6735/10581 cut-off events. For 580286/580340 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 69669 event pairs, 2006 based on Foata normal form. 82/10662 useless extension candidates. Maximal degree in co-relation 90815. Up to 9021 conditions per place. [2024-06-03 19:56:00,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 187 changer transitions 0/652 dead transitions. [2024-06-03 19:56:00,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 652 transitions, 14899 flow [2024-06-03 19:56:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:56:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 19:56:00,054 INFO L175 Difference]: Start difference. First operand has 301 places, 610 transitions, 13205 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:56:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 652 transitions, 14899 flow [2024-06-03 19:56:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 652 transitions, 14535 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:01,802 INFO L231 Difference]: Finished difference. Result has 304 places, 614 transitions, 13428 flow [2024-06-03 19:56:01,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12843, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13428, PETRI_PLACES=304, PETRI_TRANSITIONS=614} [2024-06-03 19:56:01,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 19:56:01,803 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 614 transitions, 13428 flow [2024-06-03 19:56:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:01,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:01,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:01,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:56:01,804 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)] === [2024-06-03 19:56:01,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1725418345, now seen corresponding path program 6 times [2024-06-03 19:56:01,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:01,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124530901] [2024-06-03 19:56:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:01,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:02,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124530901] [2024-06-03 19:56:02,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124530901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:02,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:02,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940755722] [2024-06-03 19:56:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:02,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:02,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 614 transitions, 13428 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:02,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:02,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:02,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:05,391 INFO L124 PetriNetUnfolderBase]: 6857/10765 cut-off events. [2024-06-03 19:56:05,391 INFO L125 PetriNetUnfolderBase]: For 579119/579151 co-relation queries the response was YES. [2024-06-03 19:56:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92542 conditions, 10765 events. 6857/10765 cut-off events. For 579119/579151 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 71038 event pairs, 2152 based on Foata normal form. 60/10824 useless extension candidates. Maximal degree in co-relation 92404. Up to 9650 conditions per place. [2024-06-03 19:56:05,567 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 168 changer transitions 0/662 dead transitions. [2024-06-03 19:56:05,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 662 transitions, 15228 flow [2024-06-03 19:56:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:56:05,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-03 19:56:05,568 INFO L175 Difference]: Start difference. First operand has 304 places, 614 transitions, 13428 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:56:05,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 662 transitions, 15228 flow [2024-06-03 19:56:07,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 662 transitions, 14732 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:07,591 INFO L231 Difference]: Finished difference. Result has 306 places, 618 transitions, 13488 flow [2024-06-03 19:56:07,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12934, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13488, PETRI_PLACES=306, PETRI_TRANSITIONS=618} [2024-06-03 19:56:07,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-03 19:56:07,591 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 618 transitions, 13488 flow [2024-06-03 19:56:07,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:07,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:07,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:07,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:56:07,592 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:07,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -787075186, now seen corresponding path program 5 times [2024-06-03 19:56:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:07,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525596689] [2024-06-03 19:56:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:07,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:08,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:08,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525596689] [2024-06-03 19:56:08,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525596689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:08,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:08,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077174237] [2024-06-03 19:56:08,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:08,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:08,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:08,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:08,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 618 transitions, 13488 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:08,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:08,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:08,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:10,739 INFO L124 PetriNetUnfolderBase]: 6885/10815 cut-off events. [2024-06-03 19:56:10,739 INFO L125 PetriNetUnfolderBase]: For 543695/543749 co-relation queries the response was YES. [2024-06-03 19:56:10,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91837 conditions, 10815 events. 6885/10815 cut-off events. For 543695/543749 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 71641 event pairs, 2481 based on Foata normal form. 64/10878 useless extension candidates. Maximal degree in co-relation 91698. Up to 9994 conditions per place. [2024-06-03 19:56:10,893 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 490 selfloop transitions, 158 changer transitions 0/651 dead transitions. [2024-06-03 19:56:10,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 651 transitions, 15262 flow [2024-06-03 19:56:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:56:10,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:56:10,895 INFO L175 Difference]: Start difference. First operand has 306 places, 618 transitions, 13488 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:56:10,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 651 transitions, 15262 flow [2024-06-03 19:56:12,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 651 transitions, 14783 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:12,864 INFO L231 Difference]: Finished difference. Result has 308 places, 626 transitions, 13494 flow [2024-06-03 19:56:12,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13013, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13494, PETRI_PLACES=308, PETRI_TRANSITIONS=626} [2024-06-03 19:56:12,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-03 19:56:12,864 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 626 transitions, 13494 flow [2024-06-03 19:56:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:12,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:12,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:56:12,865 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:12,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 403967694, now seen corresponding path program 5 times [2024-06-03 19:56:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726680170] [2024-06-03 19:56:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:13,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726680170] [2024-06-03 19:56:13,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726680170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:13,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:13,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:56:13,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782350374] [2024-06-03 19:56:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:56:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:56:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:56:13,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:13,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 626 transitions, 13494 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:13,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:13,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:13,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:15,742 INFO L124 PetriNetUnfolderBase]: 6843/10756 cut-off events. [2024-06-03 19:56:15,743 INFO L125 PetriNetUnfolderBase]: For 517816/517816 co-relation queries the response was YES. [2024-06-03 19:56:15,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90134 conditions, 10756 events. 6843/10756 cut-off events. For 517816/517816 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 71134 event pairs, 2988 based on Foata normal form. 6/10761 useless extension candidates. Maximal degree in co-relation 89994. Up to 10531 conditions per place. [2024-06-03 19:56:15,894 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 608 selfloop transitions, 36 changer transitions 0/647 dead transitions. [2024-06-03 19:56:15,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 647 transitions, 15027 flow [2024-06-03 19:56:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:56:15,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 19:56:15,895 INFO L175 Difference]: Start difference. First operand has 308 places, 626 transitions, 13494 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:56:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 647 transitions, 15027 flow [2024-06-03 19:56:17,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 647 transitions, 14611 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:17,709 INFO L231 Difference]: Finished difference. Result has 309 places, 626 transitions, 13164 flow [2024-06-03 19:56:17,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13078, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13164, PETRI_PLACES=309, PETRI_TRANSITIONS=626} [2024-06-03 19:56:17,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-03 19:56:17,710 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 626 transitions, 13164 flow [2024-06-03 19:56:17,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:17,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:17,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:17,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:56:17,710 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)] === [2024-06-03 19:56:17,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224212, now seen corresponding path program 6 times [2024-06-03 19:56:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:17,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144985339] [2024-06-03 19:56:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:18,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144985339] [2024-06-03 19:56:18,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144985339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:18,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:18,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:56:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262440198] [2024-06-03 19:56:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:18,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:56:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:56:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:56:18,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:18,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 626 transitions, 13164 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:18,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:18,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:18,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:20,668 INFO L124 PetriNetUnfolderBase]: 6858/10776 cut-off events. [2024-06-03 19:56:20,668 INFO L125 PetriNetUnfolderBase]: For 520700/520700 co-relation queries the response was YES. [2024-06-03 19:56:20,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89866 conditions, 10776 events. 6858/10776 cut-off events. For 520700/520700 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 71231 event pairs, 2994 based on Foata normal form. 3/10778 useless extension candidates. Maximal degree in co-relation 89725. Up to 10588 conditions per place. [2024-06-03 19:56:20,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 22 changer transitions 0/646 dead transitions. [2024-06-03 19:56:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 646 transitions, 14657 flow [2024-06-03 19:56:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 19:56:20,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 19:56:20,877 INFO L175 Difference]: Start difference. First operand has 309 places, 626 transitions, 13164 flow. Second operand 7 states and 114 transitions. [2024-06-03 19:56:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 646 transitions, 14657 flow [2024-06-03 19:56:23,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 646 transitions, 14107 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-03 19:56:23,057 INFO L231 Difference]: Finished difference. Result has 307 places, 632 transitions, 12815 flow [2024-06-03 19:56:23,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12640, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12815, PETRI_PLACES=307, PETRI_TRANSITIONS=632} [2024-06-03 19:56:23,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-03 19:56:23,058 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 632 transitions, 12815 flow [2024-06-03 19:56:23,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:23,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:23,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:23,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:56:23,059 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)] === [2024-06-03 19:56:23,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash -249963856, now seen corresponding path program 7 times [2024-06-03 19:56:23,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:23,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450877857] [2024-06-03 19:56:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:23,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:23,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:23,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450877857] [2024-06-03 19:56:23,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450877857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:23,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:23,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:56:23,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785417975] [2024-06-03 19:56:23,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:23,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:56:23,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:56:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:56:23,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:23,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 632 transitions, 12815 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:23,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:23,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:26,111 INFO L124 PetriNetUnfolderBase]: 6840/10754 cut-off events. [2024-06-03 19:56:26,112 INFO L125 PetriNetUnfolderBase]: For 519098/519100 co-relation queries the response was YES. [2024-06-03 19:56:26,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89049 conditions, 10754 events. 6840/10754 cut-off events. For 519098/519100 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 71146 event pairs, 2984 based on Foata normal form. 8/10761 useless extension candidates. Maximal degree in co-relation 88909. Up to 10472 conditions per place. [2024-06-03 19:56:26,298 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 606 selfloop transitions, 39 changer transitions 0/648 dead transitions. [2024-06-03 19:56:26,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 648 transitions, 14316 flow [2024-06-03 19:56:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:56:26,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 19:56:26,300 INFO L175 Difference]: Start difference. First operand has 307 places, 632 transitions, 12815 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:56:26,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 648 transitions, 14316 flow [2024-06-03 19:56:28,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 648 transitions, 14212 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:28,377 INFO L231 Difference]: Finished difference. Result has 310 places, 632 transitions, 12802 flow [2024-06-03 19:56:28,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12711, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12802, PETRI_PLACES=310, PETRI_TRANSITIONS=632} [2024-06-03 19:56:28,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-03 19:56:28,378 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 632 transitions, 12802 flow [2024-06-03 19:56:28,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:28,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:28,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:56:28,379 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)] === [2024-06-03 19:56:28,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1610862350, now seen corresponding path program 8 times [2024-06-03 19:56:28,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:28,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489880232] [2024-06-03 19:56:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489880232] [2024-06-03 19:56:28,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489880232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:28,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:28,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:56:28,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369607984] [2024-06-03 19:56:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:56:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:56:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:56:28,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:28,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 632 transitions, 12802 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:28,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:28,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:28,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:31,312 INFO L124 PetriNetUnfolderBase]: 6825/10733 cut-off events. [2024-06-03 19:56:31,312 INFO L125 PetriNetUnfolderBase]: For 520556/520558 co-relation queries the response was YES. [2024-06-03 19:56:31,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88902 conditions, 10733 events. 6825/10733 cut-off events. For 520556/520558 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 70958 event pairs, 2994 based on Foata normal form. 5/10737 useless extension candidates. Maximal degree in co-relation 88761. Up to 10543 conditions per place. [2024-06-03 19:56:31,477 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 22 changer transitions 0/643 dead transitions. [2024-06-03 19:56:31,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 643 transitions, 14132 flow [2024-06-03 19:56:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 19:56:31,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-03 19:56:31,478 INFO L175 Difference]: Start difference. First operand has 310 places, 632 transitions, 12802 flow. Second operand 7 states and 111 transitions. [2024-06-03 19:56:31,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 643 transitions, 14132 flow [2024-06-03 19:56:33,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 643 transitions, 14028 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:33,427 INFO L231 Difference]: Finished difference. Result has 313 places, 632 transitions, 12750 flow [2024-06-03 19:56:33,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12698, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12750, PETRI_PLACES=313, PETRI_TRANSITIONS=632} [2024-06-03 19:56:33,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-03 19:56:33,428 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 632 transitions, 12750 flow [2024-06-03 19:56:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-03 19:56:33,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:33,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:33,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:56:33,428 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:33,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1856445593, now seen corresponding path program 7 times [2024-06-03 19:56:33,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380862784] [2024-06-03 19:56:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380862784] [2024-06-03 19:56:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380862784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:34,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:34,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745168758] [2024-06-03 19:56:34,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:34,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:34,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:34,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:34,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 632 transitions, 12750 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:34,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:34,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:37,069 INFO L124 PetriNetUnfolderBase]: 6947/10929 cut-off events. [2024-06-03 19:56:37,069 INFO L125 PetriNetUnfolderBase]: For 563413/563445 co-relation queries the response was YES. [2024-06-03 19:56:37,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90427 conditions, 10929 events. 6947/10929 cut-off events. For 563413/563445 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 72490 event pairs, 2088 based on Foata normal form. 60/10988 useless extension candidates. Maximal degree in co-relation 90285. Up to 9240 conditions per place. [2024-06-03 19:56:37,228 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 174 changer transitions 0/671 dead transitions. [2024-06-03 19:56:37,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 671 transitions, 14478 flow [2024-06-03 19:56:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:56:37,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-03 19:56:37,229 INFO L175 Difference]: Start difference. First operand has 313 places, 632 transitions, 12750 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:56:37,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 671 transitions, 14478 flow [2024-06-03 19:56:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 671 transitions, 14366 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:56:39,340 INFO L231 Difference]: Finished difference. Result has 313 places, 636 transitions, 13221 flow [2024-06-03 19:56:39,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12638, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13221, PETRI_PLACES=313, PETRI_TRANSITIONS=636} [2024-06-03 19:56:39,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-03 19:56:39,341 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 636 transitions, 13221 flow [2024-06-03 19:56:39,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:39,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:39,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:39,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:56:39,342 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:39,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:39,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1856214953, now seen corresponding path program 8 times [2024-06-03 19:56:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:39,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791020683] [2024-06-03 19:56:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:39,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:40,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:40,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791020683] [2024-06-03 19:56:40,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791020683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:40,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:40,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:40,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430182234] [2024-06-03 19:56:40,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:40,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:40,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:40,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:40,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:40,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 636 transitions, 13221 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:40,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:40,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:40,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:43,204 INFO L124 PetriNetUnfolderBase]: 6983/11017 cut-off events. [2024-06-03 19:56:43,204 INFO L125 PetriNetUnfolderBase]: For 586559/586613 co-relation queries the response was YES. [2024-06-03 19:56:43,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90334 conditions, 11017 events. 6983/11017 cut-off events. For 586559/586613 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 73584 event pairs, 1960 based on Foata normal form. 106/11122 useless extension candidates. Maximal degree in co-relation 90191. Up to 8852 conditions per place. [2024-06-03 19:56:43,355 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 454 selfloop transitions, 212 changer transitions 0/669 dead transitions. [2024-06-03 19:56:43,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 669 transitions, 14769 flow [2024-06-03 19:56:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:56:43,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:56:43,356 INFO L175 Difference]: Start difference. First operand has 313 places, 636 transitions, 13221 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:56:43,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 669 transitions, 14769 flow [2024-06-03 19:56:45,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 669 transitions, 14277 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:45,350 INFO L231 Difference]: Finished difference. Result has 315 places, 639 transitions, 13270 flow [2024-06-03 19:56:45,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12729, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13270, PETRI_PLACES=315, PETRI_TRANSITIONS=639} [2024-06-03 19:56:45,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 19:56:45,351 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 639 transitions, 13270 flow [2024-06-03 19:56:45,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:45,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:45,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:45,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:56:45,352 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:45,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1800102921, now seen corresponding path program 9 times [2024-06-03 19:56:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546142464] [2024-06-03 19:56:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:46,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546142464] [2024-06-03 19:56:46,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546142464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:46,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:46,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:46,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145437643] [2024-06-03 19:56:46,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:46,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:46,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:46,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 639 transitions, 13270 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) [2024-06-03 19:56:46,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:46,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:46,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:48,885 INFO L124 PetriNetUnfolderBase]: 6937/10929 cut-off events. [2024-06-03 19:56:48,885 INFO L125 PetriNetUnfolderBase]: For 477980/478012 co-relation queries the response was YES. [2024-06-03 19:56:49,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88129 conditions, 10929 events. 6937/10929 cut-off events. For 477980/478012 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 72748 event pairs, 1986 based on Foata normal form. 54/10982 useless extension candidates. Maximal degree in co-relation 87985. Up to 9026 conditions per place. [2024-06-03 19:56:49,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 478 selfloop transitions, 194 changer transitions 0/675 dead transitions. [2024-06-03 19:56:49,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 675 transitions, 14820 flow [2024-06-03 19:56:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:56:49,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-03 19:56:49,063 INFO L175 Difference]: Start difference. First operand has 315 places, 639 transitions, 13270 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:56:49,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 675 transitions, 14820 flow [2024-06-03 19:56:51,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 675 transitions, 14253 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:51,435 INFO L231 Difference]: Finished difference. Result has 317 places, 639 transitions, 13121 flow [2024-06-03 19:56:51,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12703, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13121, PETRI_PLACES=317, PETRI_TRANSITIONS=639} [2024-06-03 19:56:51,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 19:56:51,436 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 639 transitions, 13121 flow [2024-06-03 19:56:51,436 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) [2024-06-03 19:56:51,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:51,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:51,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:56:51,437 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:51,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2085433431, now seen corresponding path program 10 times [2024-06-03 19:56:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035286179] [2024-06-03 19:56:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:52,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035286179] [2024-06-03 19:56:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035286179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:52,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:52,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:52,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292512841] [2024-06-03 19:56:52,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:52,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:52,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:52,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:52,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 639 transitions, 13121 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:52,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:52,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:52,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:55,196 INFO L124 PetriNetUnfolderBase]: 6917/10887 cut-off events. [2024-06-03 19:56:55,196 INFO L125 PetriNetUnfolderBase]: For 441231/441233 co-relation queries the response was YES. [2024-06-03 19:56:55,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86588 conditions, 10887 events. 6917/10887 cut-off events. For 441231/441233 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 72264 event pairs, 3032 based on Foata normal form. 12/10898 useless extension candidates. Maximal degree in co-relation 86443. Up to 10586 conditions per place. [2024-06-03 19:56:55,405 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 644 selfloop transitions, 19 changer transitions 0/666 dead transitions. [2024-06-03 19:56:55,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 666 transitions, 14505 flow [2024-06-03 19:56:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:56:55,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 19:56:55,407 INFO L175 Difference]: Start difference. First operand has 317 places, 639 transitions, 13121 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:56:55,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 666 transitions, 14505 flow [2024-06-03 19:56:57,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 666 transitions, 14081 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:57,715 INFO L231 Difference]: Finished difference. Result has 317 places, 638 transitions, 12669 flow [2024-06-03 19:56:57,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12627, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12669, PETRI_PLACES=317, PETRI_TRANSITIONS=638} [2024-06-03 19:56:57,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 19:56:57,719 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 638 transitions, 12669 flow [2024-06-03 19:56:57,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-03 19:56:57,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:57,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:57,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:56:57,719 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)] === [2024-06-03 19:56:57,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1618042973, now seen corresponding path program 1 times [2024-06-03 19:56:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:57,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925300420] [2024-06-03 19:56:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:57,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925300420] [2024-06-03 19:56:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925300420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440484189] [2024-06-03 19:56:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:58,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:58,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:58,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 638 transitions, 12669 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:58,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:58,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:58,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:01,050 INFO L124 PetriNetUnfolderBase]: 6925/10921 cut-off events. [2024-06-03 19:57:01,050 INFO L125 PetriNetUnfolderBase]: For 411349/411351 co-relation queries the response was YES. [2024-06-03 19:57:01,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85008 conditions, 10921 events. 6925/10921 cut-off events. For 411349/411351 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 72950 event pairs, 3043 based on Foata normal form. 6/10926 useless extension candidates. Maximal degree in co-relation 84863. Up to 10661 conditions per place. [2024-06-03 19:57:01,215 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 622 selfloop transitions, 35 changer transitions 0/660 dead transitions. [2024-06-03 19:57:01,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 660 transitions, 14315 flow [2024-06-03 19:57:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 19:57:01,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-03 19:57:01,217 INFO L175 Difference]: Start difference. First operand has 317 places, 638 transitions, 12669 flow. Second operand 9 states and 137 transitions. [2024-06-03 19:57:01,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 660 transitions, 14315 flow [2024-06-03 19:57:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 660 transitions, 14075 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:57:03,137 INFO L231 Difference]: Finished difference. Result has 320 places, 646 transitions, 12697 flow [2024-06-03 19:57:03,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12429, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12697, PETRI_PLACES=320, PETRI_TRANSITIONS=646} [2024-06-03 19:57:03,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 19:57:03,140 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 646 transitions, 12697 flow [2024-06-03 19:57:03,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:03,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:03,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:03,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:57:03,141 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:03,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1963554362, now seen corresponding path program 6 times [2024-06-03 19:57:03,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:03,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698533371] [2024-06-03 19:57:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:03,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:03,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698533371] [2024-06-03 19:57:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698533371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:03,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:03,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:03,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932840672] [2024-06-03 19:57:03,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:03,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:03,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:03,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:03,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 646 transitions, 12697 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:03,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:03,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:03,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:06,314 INFO L124 PetriNetUnfolderBase]: 6907/10897 cut-off events. [2024-06-03 19:57:06,315 INFO L125 PetriNetUnfolderBase]: For 418470/418472 co-relation queries the response was YES. [2024-06-03 19:57:06,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83640 conditions, 10897 events. 6907/10897 cut-off events. For 418470/418472 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 72818 event pairs, 3052 based on Foata normal form. 8/10904 useless extension candidates. Maximal degree in co-relation 83494. Up to 10603 conditions per place. [2024-06-03 19:57:06,496 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 609 selfloop transitions, 51 changer transitions 0/663 dead transitions. [2024-06-03 19:57:06,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 663 transitions, 14116 flow [2024-06-03 19:57:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:57:06,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 19:57:06,497 INFO L175 Difference]: Start difference. First operand has 320 places, 646 transitions, 12697 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:57:06,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 663 transitions, 14116 flow [2024-06-03 19:57:08,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 663 transitions, 13923 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:08,440 INFO L231 Difference]: Finished difference. Result has 324 places, 647 transitions, 12632 flow [2024-06-03 19:57:08,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12504, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12632, PETRI_PLACES=324, PETRI_TRANSITIONS=647} [2024-06-03 19:57:08,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-03 19:57:08,441 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 647 transitions, 12632 flow [2024-06-03 19:57:08,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:08,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:08,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:57:08,441 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1462207788, now seen corresponding path program 1 times [2024-06-03 19:57:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:08,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000145308] [2024-06-03 19:57:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:09,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:09,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000145308] [2024-06-03 19:57:09,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000145308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:09,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:09,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:09,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076313491] [2024-06-03 19:57:09,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:09,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:09,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:09,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:09,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:09,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 647 transitions, 12632 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:09,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:09,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:09,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:11,531 INFO L124 PetriNetUnfolderBase]: 6936/10964 cut-off events. [2024-06-03 19:57:11,532 INFO L125 PetriNetUnfolderBase]: For 424774/424827 co-relation queries the response was YES. [2024-06-03 19:57:11,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83887 conditions, 10964 events. 6936/10964 cut-off events. For 424774/424827 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 73270 event pairs, 1977 based on Foata normal form. 54/11017 useless extension candidates. Maximal degree in co-relation 83739. Up to 9975 conditions per place. [2024-06-03 19:57:11,684 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 550 selfloop transitions, 149 changer transitions 0/702 dead transitions. [2024-06-03 19:57:11,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 702 transitions, 14722 flow [2024-06-03 19:57:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:57:11,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:57:11,686 INFO L175 Difference]: Start difference. First operand has 324 places, 647 transitions, 12632 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:57:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 702 transitions, 14722 flow [2024-06-03 19:57:14,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 702 transitions, 14582 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:14,035 INFO L231 Difference]: Finished difference. Result has 329 places, 657 transitions, 13003 flow [2024-06-03 19:57:14,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13003, PETRI_PLACES=329, PETRI_TRANSITIONS=657} [2024-06-03 19:57:14,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-03 19:57:14,036 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 657 transitions, 13003 flow [2024-06-03 19:57:14,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:14,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:14,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:14,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:57:14,037 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:14,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -721852438, now seen corresponding path program 2 times [2024-06-03 19:57:14,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:14,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157095024] [2024-06-03 19:57:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:14,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157095024] [2024-06-03 19:57:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157095024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:14,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:14,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007269707] [2024-06-03 19:57:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:14,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:14,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:14,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 657 transitions, 13003 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:14,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:14,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:14,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:17,273 INFO L124 PetriNetUnfolderBase]: 7026/11096 cut-off events. [2024-06-03 19:57:17,273 INFO L125 PetriNetUnfolderBase]: For 450767/450820 co-relation queries the response was YES. [2024-06-03 19:57:17,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86619 conditions, 11096 events. 7026/11096 cut-off events. For 450767/450820 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 74738 event pairs, 2351 based on Foata normal form. 54/11149 useless extension candidates. Maximal degree in co-relation 86468. Up to 10244 conditions per place. [2024-06-03 19:57:17,697 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 556 selfloop transitions, 153 changer transitions 0/712 dead transitions. [2024-06-03 19:57:17,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 712 transitions, 15180 flow [2024-06-03 19:57:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:57:17,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-03 19:57:17,698 INFO L175 Difference]: Start difference. First operand has 329 places, 657 transitions, 13003 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:57:17,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 712 transitions, 15180 flow [2024-06-03 19:57:19,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 712 transitions, 14783 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:19,505 INFO L231 Difference]: Finished difference. Result has 335 places, 670 transitions, 13235 flow [2024-06-03 19:57:19,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12708, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13235, PETRI_PLACES=335, PETRI_TRANSITIONS=670} [2024-06-03 19:57:19,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-03 19:57:19,506 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 670 transitions, 13235 flow [2024-06-03 19:57:19,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:19,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:19,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:19,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:57:19,507 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)] === [2024-06-03 19:57:19,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash -688372438, now seen corresponding path program 3 times [2024-06-03 19:57:19,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:19,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158130690] [2024-06-03 19:57:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:19,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:20,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:20,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158130690] [2024-06-03 19:57:20,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158130690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:20,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:20,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799055378] [2024-06-03 19:57:20,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:20,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:20,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 670 transitions, 13235 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:20,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:20,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:20,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:22,960 INFO L124 PetriNetUnfolderBase]: 7016/11078 cut-off events. [2024-06-03 19:57:22,961 INFO L125 PetriNetUnfolderBase]: For 450118/450179 co-relation queries the response was YES. [2024-06-03 19:57:23,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86342 conditions, 11078 events. 7016/11078 cut-off events. For 450118/450179 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 74503 event pairs, 2366 based on Foata normal form. 62/11139 useless extension candidates. Maximal degree in co-relation 86188. Up to 10356 conditions per place. [2024-06-03 19:57:23,105 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 145 changer transitions 0/707 dead transitions. [2024-06-03 19:57:23,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 707 transitions, 14992 flow [2024-06-03 19:57:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:57:23,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 19:57:23,108 INFO L175 Difference]: Start difference. First operand has 335 places, 670 transitions, 13235 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:57:23,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 707 transitions, 14992 flow [2024-06-03 19:57:24,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 707 transitions, 14779 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:24,923 INFO L231 Difference]: Finished difference. Result has 339 places, 671 transitions, 13329 flow [2024-06-03 19:57:24,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13022, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13329, PETRI_PLACES=339, PETRI_TRANSITIONS=671} [2024-06-03 19:57:24,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-03 19:57:24,924 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 671 transitions, 13329 flow [2024-06-03 19:57:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:24,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:24,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:57:24,925 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)] === [2024-06-03 19:57:24,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash -689438838, now seen corresponding path program 1 times [2024-06-03 19:57:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:24,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542794906] [2024-06-03 19:57:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:24,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:25,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:25,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542794906] [2024-06-03 19:57:25,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542794906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:25,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:25,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:25,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754776659] [2024-06-03 19:57:25,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:25,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:25,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:25,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 671 transitions, 13329 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:25,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:25,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:28,663 INFO L124 PetriNetUnfolderBase]: 7092/11184 cut-off events. [2024-06-03 19:57:28,663 INFO L125 PetriNetUnfolderBase]: For 464345/464406 co-relation queries the response was YES. [2024-06-03 19:57:28,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87248 conditions, 11184 events. 7092/11184 cut-off events. For 464345/464406 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 75161 event pairs, 2359 based on Foata normal form. 62/11245 useless extension candidates. Maximal degree in co-relation 87093. Up to 9851 conditions per place. [2024-06-03 19:57:28,842 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 485 selfloop transitions, 241 changer transitions 0/729 dead transitions. [2024-06-03 19:57:28,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 729 transitions, 15547 flow [2024-06-03 19:57:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:57:28,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-03 19:57:28,844 INFO L175 Difference]: Start difference. First operand has 339 places, 671 transitions, 13329 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:57:28,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 729 transitions, 15547 flow [2024-06-03 19:57:31,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 729 transitions, 15278 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:31,329 INFO L231 Difference]: Finished difference. Result has 342 places, 690 transitions, 13871 flow [2024-06-03 19:57:31,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13060, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13871, PETRI_PLACES=342, PETRI_TRANSITIONS=690} [2024-06-03 19:57:31,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-03 19:57:31,330 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 690 transitions, 13871 flow [2024-06-03 19:57:31,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:31,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:31,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:57:31,332 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)] === [2024-06-03 19:57:31,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash 796004326, now seen corresponding path program 1 times [2024-06-03 19:57:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:31,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463539010] [2024-06-03 19:57:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463539010] [2024-06-03 19:57:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463539010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:31,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:31,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291818437] [2024-06-03 19:57:31,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:32,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:32,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 690 transitions, 13871 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:32,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:32,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:32,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:34,934 INFO L124 PetriNetUnfolderBase]: 7152/11273 cut-off events. [2024-06-03 19:57:34,934 INFO L125 PetriNetUnfolderBase]: For 499880/499934 co-relation queries the response was YES. [2024-06-03 19:57:35,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89442 conditions, 11273 events. 7152/11273 cut-off events. For 499880/499934 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 75862 event pairs, 2455 based on Foata normal form. 64/11336 useless extension candidates. Maximal degree in co-relation 89286. Up to 10599 conditions per place. [2024-06-03 19:57:35,155 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 632 selfloop transitions, 95 changer transitions 0/730 dead transitions. [2024-06-03 19:57:35,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 730 transitions, 15659 flow [2024-06-03 19:57:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:57:35,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:57:35,156 INFO L175 Difference]: Start difference. First operand has 342 places, 690 transitions, 13871 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:57:35,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 730 transitions, 15659 flow [2024-06-03 19:57:37,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 730 transitions, 15492 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:37,582 INFO L231 Difference]: Finished difference. Result has 347 places, 694 transitions, 14001 flow [2024-06-03 19:57:37,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13706, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14001, PETRI_PLACES=347, PETRI_TRANSITIONS=694} [2024-06-03 19:57:37,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 19:57:37,583 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 694 transitions, 14001 flow [2024-06-03 19:57:37,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:37,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:37,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:57:37,584 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)] === [2024-06-03 19:57:37,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 713024242, now seen corresponding path program 2 times [2024-06-03 19:57:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:37,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353659563] [2024-06-03 19:57:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:38,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:38,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353659563] [2024-06-03 19:57:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353659563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:38,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:38,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:38,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272941377] [2024-06-03 19:57:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:38,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:38,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 694 transitions, 14001 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:38,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:38,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:38,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:41,149 INFO L124 PetriNetUnfolderBase]: 7404/11623 cut-off events. [2024-06-03 19:57:41,149 INFO L125 PetriNetUnfolderBase]: For 570134/570188 co-relation queries the response was YES. [2024-06-03 19:57:41,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93991 conditions, 11623 events. 7404/11623 cut-off events. For 570134/570188 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 78216 event pairs, 2498 based on Foata normal form. 64/11686 useless extension candidates. Maximal degree in co-relation 93833. Up to 10255 conditions per place. [2024-06-03 19:57:41,388 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 621 selfloop transitions, 136 changer transitions 0/760 dead transitions. [2024-06-03 19:57:41,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 760 transitions, 16604 flow [2024-06-03 19:57:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:57:41,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-03 19:57:41,390 INFO L175 Difference]: Start difference. First operand has 347 places, 694 transitions, 14001 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:57:41,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 760 transitions, 16604 flow [2024-06-03 19:57:44,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 760 transitions, 16345 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:44,259 INFO L231 Difference]: Finished difference. Result has 353 places, 713 transitions, 14472 flow [2024-06-03 19:57:44,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13742, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14472, PETRI_PLACES=353, PETRI_TRANSITIONS=713} [2024-06-03 19:57:44,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-03 19:57:44,260 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 713 transitions, 14472 flow [2024-06-03 19:57:44,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:44,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:44,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:44,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:57:44,261 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)] === [2024-06-03 19:57:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:44,262 INFO L85 PathProgramCache]: Analyzing trace with hash 918368294, now seen corresponding path program 3 times [2024-06-03 19:57:44,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:44,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027225856] [2024-06-03 19:57:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:44,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:44,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:44,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027225856] [2024-06-03 19:57:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027225856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:44,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324207297] [2024-06-03 19:57:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:44,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:44,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 713 transitions, 14472 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:44,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:44,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:44,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:48,153 INFO L124 PetriNetUnfolderBase]: 7368/11576 cut-off events. [2024-06-03 19:57:48,154 INFO L125 PetriNetUnfolderBase]: For 566424/566478 co-relation queries the response was YES. [2024-06-03 19:57:48,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94966 conditions, 11576 events. 7368/11576 cut-off events. For 566424/566478 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 77865 event pairs, 2468 based on Foata normal form. 64/11639 useless extension candidates. Maximal degree in co-relation 94804. Up to 10239 conditions per place. [2024-06-03 19:57:48,356 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 602 selfloop transitions, 146 changer transitions 0/751 dead transitions. [2024-06-03 19:57:48,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 751 transitions, 16556 flow [2024-06-03 19:57:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:57:48,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-03 19:57:48,358 INFO L175 Difference]: Start difference. First operand has 353 places, 713 transitions, 14472 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:57:48,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 751 transitions, 16556 flow [2024-06-03 19:57:51,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 751 transitions, 16379 flow, removed 81 selfloop flow, removed 2 redundant places. [2024-06-03 19:57:51,115 INFO L231 Difference]: Finished difference. Result has 360 places, 713 transitions, 14596 flow [2024-06-03 19:57:51,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14295, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14596, PETRI_PLACES=360, PETRI_TRANSITIONS=713} [2024-06-03 19:57:51,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-03 19:57:51,116 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 713 transitions, 14596 flow [2024-06-03 19:57:51,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:51,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:57:51,117 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)] === [2024-06-03 19:57:51,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1187678168, now seen corresponding path program 4 times [2024-06-03 19:57:51,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095892601] [2024-06-03 19:57:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095892601] [2024-06-03 19:57:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095892601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:51,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586709426] [2024-06-03 19:57:51,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:51,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:51,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:52,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:52,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 713 transitions, 14596 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:52,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:52,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:52,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:55,110 INFO L124 PetriNetUnfolderBase]: 7624/11963 cut-off events. [2024-06-03 19:57:55,110 INFO L125 PetriNetUnfolderBase]: For 624351/624383 co-relation queries the response was YES. [2024-06-03 19:57:55,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99501 conditions, 11963 events. 7624/11963 cut-off events. For 624351/624383 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 80741 event pairs, 2647 based on Foata normal form. 36/11998 useless extension candidates. Maximal degree in co-relation 99336. Up to 10899 conditions per place. [2024-06-03 19:57:55,375 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 602 selfloop transitions, 172 changer transitions 0/777 dead transitions. [2024-06-03 19:57:55,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 777 transitions, 16771 flow [2024-06-03 19:57:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:57:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:57:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:57:55,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-03 19:57:55,377 INFO L175 Difference]: Start difference. First operand has 360 places, 713 transitions, 14596 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:57:55,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 777 transitions, 16771 flow [2024-06-03 19:57:58,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 777 transitions, 16485 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:57:58,719 INFO L231 Difference]: Finished difference. Result has 364 places, 735 transitions, 15014 flow [2024-06-03 19:57:58,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14310, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15014, PETRI_PLACES=364, PETRI_TRANSITIONS=735} [2024-06-03 19:57:58,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-03 19:57:58,720 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 735 transitions, 15014 flow [2024-06-03 19:57:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:58,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:58,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:57:58,720 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)] === [2024-06-03 19:57:58,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1261769598, now seen corresponding path program 2 times [2024-06-03 19:57:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:58,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002039527] [2024-06-03 19:57:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:59,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:59,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002039527] [2024-06-03 19:57:59,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002039527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:59,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:59,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388249238] [2024-06-03 19:57:59,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:59,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:59,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:59,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 735 transitions, 15014 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:59,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:59,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:59,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:03,481 INFO L124 PetriNetUnfolderBase]: 7696/12063 cut-off events. [2024-06-03 19:58:03,481 INFO L125 PetriNetUnfolderBase]: For 651306/651338 co-relation queries the response was YES. [2024-06-03 19:58:03,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101235 conditions, 12063 events. 7696/12063 cut-off events. For 651306/651338 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 81440 event pairs, 2676 based on Foata normal form. 36/12098 useless extension candidates. Maximal degree in co-relation 101068. Up to 11151 conditions per place. [2024-06-03 19:58:03,653 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 594 selfloop transitions, 187 changer transitions 0/784 dead transitions. [2024-06-03 19:58:03,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 784 transitions, 17054 flow [2024-06-03 19:58:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:58:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:58:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-03 19:58:03,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 19:58:03,655 INFO L175 Difference]: Start difference. First operand has 364 places, 735 transitions, 15014 flow. Second operand 12 states and 213 transitions. [2024-06-03 19:58:03,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 784 transitions, 17054 flow [2024-06-03 19:58:07,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 784 transitions, 16845 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:58:07,557 INFO L231 Difference]: Finished difference. Result has 371 places, 748 transitions, 15437 flow [2024-06-03 19:58:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14805, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15437, PETRI_PLACES=371, PETRI_TRANSITIONS=748} [2024-06-03 19:58:07,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 19:58:07,558 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 748 transitions, 15437 flow [2024-06-03 19:58:07,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:07,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:07,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:07,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:58:07,559 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)] === [2024-06-03 19:58:07,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1261769908, now seen corresponding path program 5 times [2024-06-03 19:58:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:07,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203185833] [2024-06-03 19:58:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203185833] [2024-06-03 19:58:08,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203185833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:08,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:08,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:08,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664510122] [2024-06-03 19:58:08,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:08,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:08,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:08,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:08,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:08,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:08,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 748 transitions, 15437 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:08,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:08,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:08,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:11,928 INFO L124 PetriNetUnfolderBase]: 7800/12223 cut-off events. [2024-06-03 19:58:11,929 INFO L125 PetriNetUnfolderBase]: For 724896/724928 co-relation queries the response was YES. [2024-06-03 19:58:12,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103422 conditions, 12223 events. 7800/12223 cut-off events. For 724896/724928 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 82640 event pairs, 2692 based on Foata normal form. 60/12282 useless extension candidates. Maximal degree in co-relation 103252. Up to 11363 conditions per place. [2024-06-03 19:58:12,191 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 629 selfloop transitions, 159 changer transitions 0/791 dead transitions. [2024-06-03 19:58:12,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 791 transitions, 17305 flow [2024-06-03 19:58:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:58:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:58:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-03 19:58:12,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-03 19:58:12,193 INFO L175 Difference]: Start difference. First operand has 371 places, 748 transitions, 15437 flow. Second operand 11 states and 202 transitions. [2024-06-03 19:58:12,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 791 transitions, 17305 flow [2024-06-03 19:58:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 791 transitions, 17040 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-03 19:58:16,665 INFO L231 Difference]: Finished difference. Result has 375 places, 753 transitions, 15620 flow [2024-06-03 19:58:16,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15172, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15620, PETRI_PLACES=375, PETRI_TRANSITIONS=753} [2024-06-03 19:58:16,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-03 19:58:16,666 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 753 transitions, 15620 flow [2024-06-03 19:58:16,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:16,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:16,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:58:16,666 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)] === [2024-06-03 19:58:16,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash 913639006, now seen corresponding path program 1 times [2024-06-03 19:58:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019653800] [2024-06-03 19:58:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:17,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019653800] [2024-06-03 19:58:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019653800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:17,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982216623] [2024-06-03 19:58:17,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:17,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:17,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:17,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:17,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 753 transitions, 15620 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:17,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:17,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:17,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:21,606 INFO L124 PetriNetUnfolderBase]: 7813/12236 cut-off events. [2024-06-03 19:58:21,606 INFO L125 PetriNetUnfolderBase]: For 682183/682189 co-relation queries the response was YES. [2024-06-03 19:58:21,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104304 conditions, 12236 events. 7813/12236 cut-off events. For 682183/682189 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 82616 event pairs, 2982 based on Foata normal form. 8/12243 useless extension candidates. Maximal degree in co-relation 104132. Up to 11989 conditions per place. [2024-06-03 19:58:21,790 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 744 selfloop transitions, 38 changer transitions 0/785 dead transitions. [2024-06-03 19:58:21,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 785 transitions, 17408 flow [2024-06-03 19:58:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:58:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:58:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 19:58:21,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 19:58:21,792 INFO L175 Difference]: Start difference. First operand has 375 places, 753 transitions, 15620 flow. Second operand 9 states and 146 transitions. [2024-06-03 19:58:21,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 785 transitions, 17408 flow [2024-06-03 19:58:25,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 785 transitions, 17082 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 19:58:25,430 INFO L231 Difference]: Finished difference. Result has 378 places, 763 transitions, 15571 flow [2024-06-03 19:58:25,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15294, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15571, PETRI_PLACES=378, PETRI_TRANSITIONS=763} [2024-06-03 19:58:25,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-03 19:58:25,431 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 763 transitions, 15571 flow [2024-06-03 19:58:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:25,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:25,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:25,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:58:25,432 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)] === [2024-06-03 19:58:25,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash -111838390, now seen corresponding path program 3 times [2024-06-03 19:58:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086638822] [2024-06-03 19:58:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:26,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:26,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086638822] [2024-06-03 19:58:26,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086638822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:26,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:26,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:26,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480535838] [2024-06-03 19:58:26,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:26,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:26,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:26,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:26,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 763 transitions, 15571 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:26,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:26,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:26,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:30,526 INFO L124 PetriNetUnfolderBase]: 7821/12253 cut-off events. [2024-06-03 19:58:30,526 INFO L125 PetriNetUnfolderBase]: For 690776/690830 co-relation queries the response was YES. [2024-06-03 19:58:30,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104233 conditions, 12253 events. 7821/12253 cut-off events. For 690776/690830 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 82825 event pairs, 2650 based on Foata normal form. 58/12310 useless extension candidates. Maximal degree in co-relation 104057. Up to 11434 conditions per place. [2024-06-03 19:58:30,720 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 637 selfloop transitions, 154 changer transitions 0/794 dead transitions. [2024-06-03 19:58:30,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 794 transitions, 17361 flow [2024-06-03 19:58:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:58:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:58:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-03 19:58:30,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:58:30,721 INFO L175 Difference]: Start difference. First operand has 378 places, 763 transitions, 15571 flow. Second operand 11 states and 187 transitions. [2024-06-03 19:58:30,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 794 transitions, 17361 flow [2024-06-03 19:58:34,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 794 transitions, 17230 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 19:58:34,640 INFO L231 Difference]: Finished difference. Result has 385 places, 767 transitions, 15853 flow [2024-06-03 19:58:34,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15440, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15853, PETRI_PLACES=385, PETRI_TRANSITIONS=767} [2024-06-03 19:58:34,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-03 19:58:34,641 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 767 transitions, 15853 flow [2024-06-03 19:58:34,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:34,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:34,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:34,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:58:34,641 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)] === [2024-06-03 19:58:34,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -111838700, now seen corresponding path program 6 times [2024-06-03 19:58:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424434417] [2024-06-03 19:58:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424434417] [2024-06-03 19:58:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424434417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:35,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116382090] [2024-06-03 19:58:35,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:35,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:35,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:35,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:35,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 767 transitions, 15853 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:35,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:35,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:35,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:39,024 INFO L124 PetriNetUnfolderBase]: 7755/12158 cut-off events. [2024-06-03 19:58:39,024 INFO L125 PetriNetUnfolderBase]: For 696103/696157 co-relation queries the response was YES. [2024-06-03 19:58:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102084 conditions, 12158 events. 7755/12158 cut-off events. For 696103/696157 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 82209 event pairs, 2630 based on Foata normal form. 82/12239 useless extension candidates. Maximal degree in co-relation 101906. Up to 11386 conditions per place. [2024-06-03 19:58:39,206 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 663 selfloop transitions, 131 changer transitions 0/797 dead transitions. [2024-06-03 19:58:39,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 797 transitions, 17621 flow [2024-06-03 19:58:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:58:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:58:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:58:39,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 19:58:39,207 INFO L175 Difference]: Start difference. First operand has 385 places, 767 transitions, 15853 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:58:39,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 797 transitions, 17621 flow [2024-06-03 19:58:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 797 transitions, 17253 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 19:58:43,008 INFO L231 Difference]: Finished difference. Result has 387 places, 768 transitions, 15773 flow [2024-06-03 19:58:43,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15485, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15773, PETRI_PLACES=387, PETRI_TRANSITIONS=768} [2024-06-03 19:58:43,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-03 19:58:43,009 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 768 transitions, 15773 flow [2024-06-03 19:58:43,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:43,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:43,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:58:43,010 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)] === [2024-06-03 19:58:43,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1075015466, now seen corresponding path program 7 times [2024-06-03 19:58:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000294614] [2024-06-03 19:58:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:44,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:44,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000294614] [2024-06-03 19:58:44,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000294614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:44,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:44,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683650515] [2024-06-03 19:58:44,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:44,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:44,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 768 transitions, 15773 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:44,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:44,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:48,045 INFO L124 PetriNetUnfolderBase]: 8543/13337 cut-off events. [2024-06-03 19:58:48,045 INFO L125 PetriNetUnfolderBase]: For 742681/742683 co-relation queries the response was YES. [2024-06-03 19:58:48,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114994 conditions, 13337 events. 8543/13337 cut-off events. For 742681/742683 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 90703 event pairs, 3298 based on Foata normal form. 6/13342 useless extension candidates. Maximal degree in co-relation 114815. Up to 11741 conditions per place. [2024-06-03 19:58:48,258 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 673 selfloop transitions, 261 changer transitions 0/937 dead transitions. [2024-06-03 19:58:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 937 transitions, 21217 flow [2024-06-03 19:58:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:58:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:58:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 19:58:48,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-03 19:58:48,259 INFO L175 Difference]: Start difference. First operand has 387 places, 768 transitions, 15773 flow. Second operand 10 states and 179 transitions. [2024-06-03 19:58:48,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 937 transitions, 21217 flow [2024-06-03 19:58:53,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 937 transitions, 20811 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 19:58:53,353 INFO L231 Difference]: Finished difference. Result has 393 places, 886 transitions, 19328 flow [2024-06-03 19:58:53,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15501, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19328, PETRI_PLACES=393, PETRI_TRANSITIONS=886} [2024-06-03 19:58:53,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-03 19:58:53,354 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 886 transitions, 19328 flow [2024-06-03 19:58:53,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:53,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:53,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:53,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:58:53,354 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)] === [2024-06-03 19:58:53,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1193345318, now seen corresponding path program 4 times [2024-06-03 19:58:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:53,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391375668] [2024-06-03 19:58:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:54,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:54,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391375668] [2024-06-03 19:58:54,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391375668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:54,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:54,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:54,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298539360] [2024-06-03 19:58:54,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:54,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:54,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:54,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:54,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:54,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 886 transitions, 19328 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:54,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:54,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:54,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:58,268 INFO L124 PetriNetUnfolderBase]: 8663/13509 cut-off events. [2024-06-03 19:58:58,269 INFO L125 PetriNetUnfolderBase]: For 825426/825468 co-relation queries the response was YES. [2024-06-03 19:58:58,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119099 conditions, 13509 events. 8663/13509 cut-off events. For 825426/825468 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 92117 event pairs, 2631 based on Foata normal form. 64/13572 useless extension candidates. Maximal degree in co-relation 118915. Up to 12561 conditions per place. [2024-06-03 19:58:58,471 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 772 selfloop transitions, 151 changer transitions 0/926 dead transitions. [2024-06-03 19:58:58,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 926 transitions, 21627 flow [2024-06-03 19:58:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:58:58,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-03 19:58:58,472 INFO L175 Difference]: Start difference. First operand has 393 places, 886 transitions, 19328 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:58:58,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 926 transitions, 21627 flow [2024-06-03 19:59:03,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 926 transitions, 21435 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:59:03,379 INFO L231 Difference]: Finished difference. Result has 397 places, 894 transitions, 19668 flow [2024-06-03 19:59:03,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=19136, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19668, PETRI_PLACES=397, PETRI_TRANSITIONS=894} [2024-06-03 19:59:03,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-03 19:59:03,380 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 894 transitions, 19668 flow [2024-06-03 19:59:03,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:03,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:03,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:03,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:59:03,380 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)] === [2024-06-03 19:59:03,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash -805447610, now seen corresponding path program 5 times [2024-06-03 19:59:03,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:03,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105410290] [2024-06-03 19:59:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:03,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105410290] [2024-06-03 19:59:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105410290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:04,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:59:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725219960] [2024-06-03 19:59:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:59:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:59:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:59:04,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:04,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 894 transitions, 19668 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:04,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:04,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:04,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:08,445 INFO L124 PetriNetUnfolderBase]: 8959/13919 cut-off events. [2024-06-03 19:59:08,446 INFO L125 PetriNetUnfolderBase]: For 930148/930190 co-relation queries the response was YES. [2024-06-03 19:59:08,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125714 conditions, 13919 events. 8959/13919 cut-off events. For 930148/930190 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 94732 event pairs, 2612 based on Foata normal form. 64/13982 useless extension candidates. Maximal degree in co-relation 125529. Up to 11616 conditions per place. [2024-06-03 19:59:08,670 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 685 selfloop transitions, 269 changer transitions 0/957 dead transitions. [2024-06-03 19:59:08,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 957 transitions, 22770 flow [2024-06-03 19:59:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:59:08,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-03 19:59:08,671 INFO L175 Difference]: Start difference. First operand has 397 places, 894 transitions, 19668 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:59:08,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 957 transitions, 22770 flow [2024-06-03 19:59:13,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 957 transitions, 22160 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-03 19:59:13,964 INFO L231 Difference]: Finished difference. Result has 399 places, 910 transitions, 20172 flow [2024-06-03 19:59:13,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=19096, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20172, PETRI_PLACES=399, PETRI_TRANSITIONS=910} [2024-06-03 19:59:13,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-03 19:59:13,965 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 910 transitions, 20172 flow [2024-06-03 19:59:13,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:13,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:13,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:13,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:59:13,966 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)] === [2024-06-03 19:59:13,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1370596808, now seen corresponding path program 6 times [2024-06-03 19:59:13,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:13,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182732642] [2024-06-03 19:59:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:14,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182732642] [2024-06-03 19:59:14,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182732642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:14,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:14,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:59:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052200855] [2024-06-03 19:59:14,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:59:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:59:14,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:59:14,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:14,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 910 transitions, 20172 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:14,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:14,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:14,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:19,100 INFO L124 PetriNetUnfolderBase]: 9115/14115 cut-off events. [2024-06-03 19:59:19,101 INFO L125 PetriNetUnfolderBase]: For 935643/935685 co-relation queries the response was YES. [2024-06-03 19:59:19,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129001 conditions, 14115 events. 9115/14115 cut-off events. For 935643/935685 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 95564 event pairs, 2553 based on Foata normal form. 52/14166 useless extension candidates. Maximal degree in co-relation 128814. Up to 11696 conditions per place. [2024-06-03 19:59:19,322 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 675 selfloop transitions, 279 changer transitions 0/957 dead transitions. [2024-06-03 19:59:19,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 957 transitions, 23009 flow [2024-06-03 19:59:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:59:19,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-03 19:59:19,323 INFO L175 Difference]: Start difference. First operand has 399 places, 910 transitions, 20172 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:59:19,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 957 transitions, 23009 flow [2024-06-03 19:59:24,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 957 transitions, 22737 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-03 19:59:24,796 INFO L231 Difference]: Finished difference. Result has 404 places, 919 transitions, 20740 flow [2024-06-03 19:59:24,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=19926, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20740, PETRI_PLACES=404, PETRI_TRANSITIONS=919} [2024-06-03 19:59:24,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-03 19:59:24,797 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 919 transitions, 20740 flow [2024-06-03 19:59:24,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:24,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:24,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:59:24,798 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)] === [2024-06-03 19:59:24,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:24,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1075254786, now seen corresponding path program 4 times [2024-06-03 19:59:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108041171] [2024-06-03 19:59:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:24,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat