./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix001.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix001.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:45:13,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:45:13,759 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:45:13,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:45:13,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:45:13,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:45:13,799 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:45:13,799 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:45:13,800 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:45:13,804 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:45:13,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:45:13,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:45:13,806 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:45:13,807 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:45:13,807 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:45:13,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:45:13,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:45:13,808 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:45:13,808 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:45:13,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:45:13,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:45:13,809 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:45:13,809 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:45:13,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:45:13,810 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:45:13,810 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:45:13,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:45:13,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:45:13,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:45:13,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:45:13,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:45:13,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:45:13,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:45:13,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:45:13,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:45:13,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:45:13,814 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:45:13,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:45:13,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:45:13,815 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:45:13,815 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:45:13,815 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:45:13,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:45:13,816 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:45:14,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:45:14,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:45:14,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:45:14,117 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:45:14,117 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:45:14,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix001.opt.yml/witness.yml [2024-06-27 19:45:14,299 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:45:14,299 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:45:14,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-27 19:45:15,474 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:45:15,719 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:45:15,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-27 19:45:15,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea1aed67/a26251d6b656407ca4cea9d52539ab04/FLAGd7895eb24 [2024-06-27 19:45:15,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea1aed67/a26251d6b656407ca4cea9d52539ab04 [2024-06-27 19:45:15,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:45:15,759 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:45:15,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:45:15,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:45:15,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:45:15,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:45:14" (1/2) ... [2024-06-27 19:45:15,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e9ed6d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:15, skipping insertion in model container [2024-06-27 19:45:15,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:45:14" (1/2) ... [2024-06-27 19:45:15,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5dc256c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:45:15, skipping insertion in model container [2024-06-27 19:45:15,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:45:15" (2/2) ... [2024-06-27 19:45:15,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e9ed6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:15, skipping insertion in model container [2024-06-27 19:45:15,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:45:15" (2/2) ... [2024-06-27 19:45:15,771 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:45:15,880 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:45:15,882 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:45:15,882 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:45:15,882 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 19:45:15,883 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:45:15,883 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 19:45:15,929 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:45:16,282 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:45:16,294 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:45:16,402 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:45:16,439 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:45:16,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16 WrapperNode [2024-06-27 19:45:16,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:45:16,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:45:16,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:45:16,441 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:45:16,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,504 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-27 19:45:16,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:45:16,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:45:16,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:45:16,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:45:16,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,665 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:45:16,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:45:16,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:45:16,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:45:16,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:45:16,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (1/1) ... [2024-06-27 19:45:16,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:45:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:45:16,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:45:16,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:45:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:45:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:45:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:45:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:45:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:45:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:45:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:45:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:45:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:45:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:45:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:45:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:45:16,773 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:45:16,906 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:45:16,908 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:45:17,252 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:45:17,252 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:45:17,449 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:45:17,449 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:45:17,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:45:17 BoogieIcfgContainer [2024-06-27 19:45:17,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:45:17,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:45:17,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:45:17,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:45:17,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:45:14" (1/4) ... [2024-06-27 19:45:17,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7e6c45 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:45:17, skipping insertion in model container [2024-06-27 19:45:17,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:45:15" (2/4) ... [2024-06-27 19:45:17,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7e6c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:45:17, skipping insertion in model container [2024-06-27 19:45:17,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:45:16" (3/4) ... [2024-06-27 19:45:17,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7e6c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:45:17, skipping insertion in model container [2024-06-27 19:45:17,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:45:17" (4/4) ... [2024-06-27 19:45:17,460 INFO L112 eAbstractionObserver]: Analyzing ICFG mix001.opt.i [2024-06-27 19:45:17,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:45:17,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:45:17,477 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:45:17,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:45:17,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:45:17,633 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 19:45:17,633 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:45:17,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:45:17,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:45:17,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 19:45:17,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:45:17,661 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;@96aeb7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:45:17,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:45:17,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:45:17,667 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:45:17,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:45:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:17,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:45:17,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:17,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash 402627273, now seen corresponding path program 1 times [2024-06-27 19:45:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498708638] [2024-06-27 19:45:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:18,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:18,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498708638] [2024-06-27 19:45:18,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498708638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:18,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:18,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:45:18,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415893450] [2024-06-27 19:45:18,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:18,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:45:18,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:45:18,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:45:19,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-06-27 19:45:19,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:19,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:19,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-06-27 19:45:19,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:19,358 INFO L124 PetriNetUnfolderBase]: 869/1413 cut-off events. [2024-06-27 19:45:19,358 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 19:45:19,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 1413 events. 869/1413 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7439 event pairs, 566 based on Foata normal form. 1/1349 useless extension candidates. Maximal degree in co-relation 2779. Up to 1315 conditions per place. [2024-06-27 19:45:19,372 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 19:45:19,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 171 flow [2024-06-27 19:45:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:45:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:45:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-27 19:45:19,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-06-27 19:45:19,385 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 85 transitions. [2024-06-27 19:45:19,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 171 flow [2024-06-27 19:45:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:19,392 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 19:45:19,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 19:45:19,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 19:45:19,397 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 19:45:19,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:19,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:19,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:45:19,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:19,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash 378898490, now seen corresponding path program 1 times [2024-06-27 19:45:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:19,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691162889] [2024-06-27 19:45:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:20,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691162889] [2024-06-27 19:45:20,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691162889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:20,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:20,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:45:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118272916] [2024-06-27 19:45:20,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:20,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:45:20,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:20,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:45:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:45:20,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:45:20,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:20,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:20,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:45:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:20,704 INFO L124 PetriNetUnfolderBase]: 1280/1980 cut-off events. [2024-06-27 19:45:20,704 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-06-27 19:45:20,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 1980 events. 1280/1980 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10119 event pairs, 750 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 4489. Up to 1897 conditions per place. [2024-06-27 19:45:20,718 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 19:45:20,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-27 19:45:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:45:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:45:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:45:20,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-27 19:45:20,720 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:45:20,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-27 19:45:20,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:45:20,724 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 19:45:20,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 19:45:20,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 19:45:20,725 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 19:45:20,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:20,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:20,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:20,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:45:20,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:20,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1139047968, now seen corresponding path program 1 times [2024-06-27 19:45:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714173449] [2024-06-27 19:45:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714173449] [2024-06-27 19:45:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714173449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:21,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:21,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:45:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2969900] [2024-06-27 19:45:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:45:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:45:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:45:21,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:45:21,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:21,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:21,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:45:21,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:22,129 INFO L124 PetriNetUnfolderBase]: 1274/2001 cut-off events. [2024-06-27 19:45:22,130 INFO L125 PetriNetUnfolderBase]: For 1129/1129 co-relation queries the response was YES. [2024-06-27 19:45:22,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5030 conditions, 2001 events. 1274/2001 cut-off events. For 1129/1129 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10378 event pairs, 608 based on Foata normal form. 3/2000 useless extension candidates. Maximal degree in co-relation 5016. Up to 1873 conditions per place. [2024-06-27 19:45:22,145 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 46 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 19:45:22,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 320 flow [2024-06-27 19:45:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:45:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:45:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:45:22,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:45:22,152 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:45:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 320 flow [2024-06-27 19:45:22,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 306 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:45:22,157 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-27 19:45:22,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 19:45:22,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 19:45:22,159 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-27 19:45:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:22,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:22,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:22,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:45:22,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:22,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1246507511, now seen corresponding path program 1 times [2024-06-27 19:45:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331563784] [2024-06-27 19:45:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:22,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331563784] [2024-06-27 19:45:22,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331563784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:22,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:45:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140109421] [2024-06-27 19:45:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:45:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:45:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:45:23,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:45:23,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:23,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:23,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:45:23,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:23,617 INFO L124 PetriNetUnfolderBase]: 1546/2453 cut-off events. [2024-06-27 19:45:23,617 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2024-06-27 19:45:23,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 2453 events. 1546/2453 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12789 event pairs, 853 based on Foata normal form. 2/2408 useless extension candidates. Maximal degree in co-relation 6586. Up to 2282 conditions per place. [2024-06-27 19:45:23,635 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-27 19:45:23,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 316 flow [2024-06-27 19:45:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:45:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:45:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 19:45:23,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-27 19:45:23,637 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 5 states and 106 transitions. [2024-06-27 19:45:23,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 316 flow [2024-06-27 19:45:23,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:23,640 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 196 flow [2024-06-27 19:45:23,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 19:45:23,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-27 19:45:23,641 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 196 flow [2024-06-27 19:45:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:23,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:23,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:23,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:45:23,642 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)] === [2024-06-27 19:45:23,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1159347704, now seen corresponding path program 1 times [2024-06-27 19:45:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:23,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672842945] [2024-06-27 19:45:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672842945] [2024-06-27 19:45:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672842945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:25,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:25,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:25,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543488723] [2024-06-27 19:45:25,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:25,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:25,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:25,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:45:25,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:25,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:25,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:45:25,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:25,798 INFO L124 PetriNetUnfolderBase]: 1763/2718 cut-off events. [2024-06-27 19:45:25,799 INFO L125 PetriNetUnfolderBase]: For 4298/4298 co-relation queries the response was YES. [2024-06-27 19:45:25,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7977 conditions, 2718 events. 1763/2718 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13851 event pairs, 617 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 7960. Up to 2517 conditions per place. [2024-06-27 19:45:25,821 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-27 19:45:25,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 450 flow [2024-06-27 19:45:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:45:25,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-27 19:45:25,823 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 196 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:45:25,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 450 flow [2024-06-27 19:45:25,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 430 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:25,829 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 243 flow [2024-06-27 19:45:25,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 19:45:25,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-27 19:45:25,832 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 243 flow [2024-06-27 19:45:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:25,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:25,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:25,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:45:25,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:25,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash 19203124, now seen corresponding path program 1 times [2024-06-27 19:45:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155705150] [2024-06-27 19:45:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:26,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:26,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155705150] [2024-06-27 19:45:26,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155705150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:26,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:26,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:26,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099151412] [2024-06-27 19:45:26,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:26,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:26,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:26,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:26,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:45:26,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:26,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:26,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:45:26,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:27,396 INFO L124 PetriNetUnfolderBase]: 1517/2438 cut-off events. [2024-06-27 19:45:27,396 INFO L125 PetriNetUnfolderBase]: For 5121/5121 co-relation queries the response was YES. [2024-06-27 19:45:27,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7626 conditions, 2438 events. 1517/2438 cut-off events. For 5121/5121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12847 event pairs, 653 based on Foata normal form. 4/2432 useless extension candidates. Maximal degree in co-relation 7607. Up to 2235 conditions per place. [2024-06-27 19:45:27,418 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-27 19:45:27,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 425 flow [2024-06-27 19:45:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 19:45:27,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-27 19:45:27,420 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 243 flow. Second operand 6 states and 125 transitions. [2024-06-27 19:45:27,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 425 flow [2024-06-27 19:45:27,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 386 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:27,425 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-27 19:45:27,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 19:45:27,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 19:45:27,428 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-27 19:45:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:27,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:27,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:45:27,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:27,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -408779306, now seen corresponding path program 1 times [2024-06-27 19:45:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:27,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642963974] [2024-06-27 19:45:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:28,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:28,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642963974] [2024-06-27 19:45:28,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642963974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:28,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:28,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510456221] [2024-06-27 19:45:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:28,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:28,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:28,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:28,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:28,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:28,899 INFO L124 PetriNetUnfolderBase]: 1880/2837 cut-off events. [2024-06-27 19:45:28,900 INFO L125 PetriNetUnfolderBase]: For 8266/8272 co-relation queries the response was YES. [2024-06-27 19:45:28,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 2837 events. 1880/2837 cut-off events. For 8266/8272 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13942 event pairs, 777 based on Foata normal form. 6/2841 useless extension candidates. Maximal degree in co-relation 9580. Up to 2734 conditions per place. [2024-06-27 19:45:28,917 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-27 19:45:28,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 526 flow [2024-06-27 19:45:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 19:45:28,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-27 19:45:28,919 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 121 transitions. [2024-06-27 19:45:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 526 flow [2024-06-27 19:45:28,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 494 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:28,924 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-27 19:45:28,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-27 19:45:28,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 19:45:28,925 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-27 19:45:28,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:28,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:28,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:28,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:45:28,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:28,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 628357624, now seen corresponding path program 2 times [2024-06-27 19:45:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191472577] [2024-06-27 19:45:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:29,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:29,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191472577] [2024-06-27 19:45:29,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191472577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:29,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:29,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132836514] [2024-06-27 19:45:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:29,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:29,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:29,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:29,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:29,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:29,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:29,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:29,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:30,495 INFO L124 PetriNetUnfolderBase]: 1875/2831 cut-off events. [2024-06-27 19:45:30,496 INFO L125 PetriNetUnfolderBase]: For 10712/10725 co-relation queries the response was YES. [2024-06-27 19:45:30,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 2831 events. 1875/2831 cut-off events. For 10712/10725 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13937 event pairs, 780 based on Foata normal form. 12/2841 useless extension candidates. Maximal degree in co-relation 10155. Up to 2729 conditions per place. [2024-06-27 19:45:30,511 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-27 19:45:30,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 494 flow [2024-06-27 19:45:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:45:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:45:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 19:45:30,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:45:30,516 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 6 states and 116 transitions. [2024-06-27 19:45:30,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 494 flow [2024-06-27 19:45:30,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 458 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:45:30,525 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 322 flow [2024-06-27 19:45:30,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 19:45:30,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-27 19:45:30,527 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 322 flow [2024-06-27 19:45:30,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:30,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:30,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:45:30,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:30,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1745515442, now seen corresponding path program 1 times [2024-06-27 19:45:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389475756] [2024-06-27 19:45:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:30,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:31,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389475756] [2024-06-27 19:45:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389475756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:31,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:31,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62585592] [2024-06-27 19:45:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:31,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:31,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:31,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:31,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:31,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:32,118 INFO L124 PetriNetUnfolderBase]: 1972/2980 cut-off events. [2024-06-27 19:45:32,118 INFO L125 PetriNetUnfolderBase]: For 13141/13151 co-relation queries the response was YES. [2024-06-27 19:45:32,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11100 conditions, 2980 events. 1972/2980 cut-off events. For 13141/13151 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14660 event pairs, 755 based on Foata normal form. 10/2988 useless extension candidates. Maximal degree in co-relation 11076. Up to 2769 conditions per place. [2024-06-27 19:45:32,136 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 74 selfloop transitions, 41 changer transitions 0/120 dead transitions. [2024-06-27 19:45:32,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 120 transitions, 942 flow [2024-06-27 19:45:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 19:45:32,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 19:45:32,138 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 322 flow. Second operand 8 states and 165 transitions. [2024-06-27 19:45:32,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 120 transitions, 942 flow [2024-06-27 19:45:32,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 877 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:32,148 INFO L231 Difference]: Finished difference. Result has 70 places, 86 transitions, 604 flow [2024-06-27 19:45:32,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=604, PETRI_PLACES=70, PETRI_TRANSITIONS=86} [2024-06-27 19:45:32,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-27 19:45:32,150 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 86 transitions, 604 flow [2024-06-27 19:45:32,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:32,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:32,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:32,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:45:32,151 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:32,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 212595122, now seen corresponding path program 2 times [2024-06-27 19:45:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:32,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837910843] [2024-06-27 19:45:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:32,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:32,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837910843] [2024-06-27 19:45:32,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837910843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:32,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:32,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217975478] [2024-06-27 19:45:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:32,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:33,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:33,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:33,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:33,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:33,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:33,783 INFO L124 PetriNetUnfolderBase]: 1988/3002 cut-off events. [2024-06-27 19:45:33,783 INFO L125 PetriNetUnfolderBase]: For 16689/16703 co-relation queries the response was YES. [2024-06-27 19:45:33,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12115 conditions, 3002 events. 1988/3002 cut-off events. For 16689/16703 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14773 event pairs, 760 based on Foata normal form. 16/3016 useless extension candidates. Maximal degree in co-relation 12087. Up to 2787 conditions per place. [2024-06-27 19:45:33,806 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 49 changer transitions 0/120 dead transitions. [2024-06-27 19:45:33,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 1032 flow [2024-06-27 19:45:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 19:45:33,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-27 19:45:33,808 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 604 flow. Second operand 7 states and 142 transitions. [2024-06-27 19:45:33,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 1032 flow [2024-06-27 19:45:33,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 998 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:45:33,827 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 753 flow [2024-06-27 19:45:33,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2024-06-27 19:45:33,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-27 19:45:33,831 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 753 flow [2024-06-27 19:45:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:33,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:33,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:45:33,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:33,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 212745069, now seen corresponding path program 1 times [2024-06-27 19:45:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746217052] [2024-06-27 19:45:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:34,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746217052] [2024-06-27 19:45:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746217052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:34,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:34,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258143299] [2024-06-27 19:45:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:34,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:34,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:34,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:35,427 INFO L124 PetriNetUnfolderBase]: 2010/3039 cut-off events. [2024-06-27 19:45:35,427 INFO L125 PetriNetUnfolderBase]: For 19411/19419 co-relation queries the response was YES. [2024-06-27 19:45:35,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12587 conditions, 3039 events. 2010/3039 cut-off events. For 19411/19419 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14922 event pairs, 710 based on Foata normal form. 12/3046 useless extension candidates. Maximal degree in co-relation 12557. Up to 2832 conditions per place. [2024-06-27 19:45:35,451 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 92 selfloop transitions, 30 changer transitions 0/127 dead transitions. [2024-06-27 19:45:35,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 1185 flow [2024-06-27 19:45:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:45:35,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 19:45:35,453 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 753 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:45:35,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 1185 flow [2024-06-27 19:45:35,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:35,473 INFO L231 Difference]: Finished difference. Result has 77 places, 98 transitions, 764 flow [2024-06-27 19:45:35,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=77, PETRI_TRANSITIONS=98} [2024-06-27 19:45:35,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-27 19:45:35,474 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 98 transitions, 764 flow [2024-06-27 19:45:35,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:35,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:35,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:45:35,475 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)] === [2024-06-27 19:45:35,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash 297779230, now seen corresponding path program 3 times [2024-06-27 19:45:35,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:35,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821245808] [2024-06-27 19:45:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:36,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:36,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821245808] [2024-06-27 19:45:36,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821245808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654292062] [2024-06-27 19:45:36,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:36,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:36,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:36,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:36,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:36,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:36,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:36,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:37,110 INFO L124 PetriNetUnfolderBase]: 2033/3073 cut-off events. [2024-06-27 19:45:37,110 INFO L125 PetriNetUnfolderBase]: For 20435/20438 co-relation queries the response was YES. [2024-06-27 19:45:37,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13006 conditions, 3073 events. 2033/3073 cut-off events. For 20435/20438 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15146 event pairs, 740 based on Foata normal form. 7/3078 useless extension candidates. Maximal degree in co-relation 12976. Up to 2845 conditions per place. [2024-06-27 19:45:37,131 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 55 changer transitions 0/132 dead transitions. [2024-06-27 19:45:37,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 132 transitions, 1240 flow [2024-06-27 19:45:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:45:37,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:45:37,133 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 764 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:45:37,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 132 transitions, 1240 flow [2024-06-27 19:45:37,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 1201 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:37,153 INFO L231 Difference]: Finished difference. Result has 81 places, 107 transitions, 952 flow [2024-06-27 19:45:37,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=952, PETRI_PLACES=81, PETRI_TRANSITIONS=107} [2024-06-27 19:45:37,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 19:45:37,154 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 107 transitions, 952 flow [2024-06-27 19:45:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:37,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:37,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:37,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:45:37,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:37,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1995748686, now seen corresponding path program 4 times [2024-06-27 19:45:37,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:37,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411885517] [2024-06-27 19:45:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:37,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411885517] [2024-06-27 19:45:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411885517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:37,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772274079] [2024-06-27 19:45:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:37,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:38,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:38,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 107 transitions, 952 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:38,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:38,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:38,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:38,729 INFO L124 PetriNetUnfolderBase]: 2022/3061 cut-off events. [2024-06-27 19:45:38,729 INFO L125 PetriNetUnfolderBase]: For 23406/23411 co-relation queries the response was YES. [2024-06-27 19:45:38,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13333 conditions, 3061 events. 2022/3061 cut-off events. For 23406/23411 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15031 event pairs, 744 based on Foata normal form. 8/3063 useless extension candidates. Maximal degree in co-relation 13301. Up to 2834 conditions per place. [2024-06-27 19:45:38,750 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 55 changer transitions 0/127 dead transitions. [2024-06-27 19:45:38,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 1264 flow [2024-06-27 19:45:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:45:38,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:45:38,752 INFO L175 Difference]: Start difference. First operand has 81 places, 107 transitions, 952 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:45:38,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 1264 flow [2024-06-27 19:45:38,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1107 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:38,783 INFO L231 Difference]: Finished difference. Result has 84 places, 107 transitions, 920 flow [2024-06-27 19:45:38,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=84, PETRI_TRANSITIONS=107} [2024-06-27 19:45:38,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-27 19:45:38,785 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 107 transitions, 920 flow [2024-06-27 19:45:38,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:38,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:38,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:38,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:45:38,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:38,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1274110517, now seen corresponding path program 2 times [2024-06-27 19:45:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:38,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893362083] [2024-06-27 19:45:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:38,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:39,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:39,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893362083] [2024-06-27 19:45:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893362083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:39,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:39,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:39,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108284090] [2024-06-27 19:45:39,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:39,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:39,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 107 transitions, 920 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:39,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:39,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:39,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:40,439 INFO L124 PetriNetUnfolderBase]: 2044/3092 cut-off events. [2024-06-27 19:45:40,440 INFO L125 PetriNetUnfolderBase]: For 26515/26528 co-relation queries the response was YES. [2024-06-27 19:45:40,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13688 conditions, 3092 events. 2044/3092 cut-off events. For 26515/26528 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15184 event pairs, 701 based on Foata normal form. 14/3103 useless extension candidates. Maximal degree in co-relation 13655. Up to 2869 conditions per place. [2024-06-27 19:45:40,461 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-27 19:45:40,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1360 flow [2024-06-27 19:45:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:45:40,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:45:40,463 INFO L175 Difference]: Start difference. First operand has 84 places, 107 transitions, 920 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:45:40,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1360 flow [2024-06-27 19:45:40,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 138 transitions, 1181 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:45:40,490 INFO L231 Difference]: Finished difference. Result has 83 places, 110 transitions, 850 flow [2024-06-27 19:45:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=83, PETRI_TRANSITIONS=110} [2024-06-27 19:45:40,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-27 19:45:40,491 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 110 transitions, 850 flow [2024-06-27 19:45:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:40,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:40,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:40,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:45:40,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:40,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash 218316699, now seen corresponding path program 3 times [2024-06-27 19:45:40,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:40,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936447725] [2024-06-27 19:45:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:41,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:41,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936447725] [2024-06-27 19:45:41,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936447725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:41,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:41,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033726464] [2024-06-27 19:45:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:41,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:41,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 110 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:41,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:41,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:41,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:42,190 INFO L124 PetriNetUnfolderBase]: 2034/3077 cut-off events. [2024-06-27 19:45:42,190 INFO L125 PetriNetUnfolderBase]: For 28960/28973 co-relation queries the response was YES. [2024-06-27 19:45:42,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 3077 events. 2034/3077 cut-off events. For 28960/28973 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15082 event pairs, 701 based on Foata normal form. 14/3088 useless extension candidates. Maximal degree in co-relation 13678. Up to 2861 conditions per place. [2024-06-27 19:45:42,208 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 94 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-06-27 19:45:42,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 134 transitions, 1188 flow [2024-06-27 19:45:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:45:42,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:45:42,210 INFO L175 Difference]: Start difference. First operand has 83 places, 110 transitions, 850 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:45:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 134 transitions, 1188 flow [2024-06-27 19:45:42,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 1082 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:42,238 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 822 flow [2024-06-27 19:45:42,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2024-06-27 19:45:42,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-27 19:45:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 822 flow [2024-06-27 19:45:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:42,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:42,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:42,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:45:42,240 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:42,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash -685239082, now seen corresponding path program 1 times [2024-06-27 19:45:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449290919] [2024-06-27 19:45:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:43,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449290919] [2024-06-27 19:45:43,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449290919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:43,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:43,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:45:43,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284982006] [2024-06-27 19:45:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:45:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:45:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:45:43,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:45:43,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 822 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:43,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:43,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:45:43,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:43,484 INFO L124 PetriNetUnfolderBase]: 1432/2444 cut-off events. [2024-06-27 19:45:43,484 INFO L125 PetriNetUnfolderBase]: For 26303/26321 co-relation queries the response was YES. [2024-06-27 19:45:43,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2444 events. 1432/2444 cut-off events. For 26303/26321 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13787 event pairs, 585 based on Foata normal form. 19/2462 useless extension candidates. Maximal degree in co-relation 10689. Up to 2059 conditions per place. [2024-06-27 19:45:43,537 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 69 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2024-06-27 19:45:43,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1020 flow [2024-06-27 19:45:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:45:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:45:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-27 19:45:43,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-06-27 19:45:43,539 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 822 flow. Second operand 5 states and 109 transitions. [2024-06-27 19:45:43,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1020 flow [2024-06-27 19:45:43,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 937 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:45:43,571 INFO L231 Difference]: Finished difference. Result has 84 places, 113 transitions, 787 flow [2024-06-27 19:45:43,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=787, PETRI_PLACES=84, PETRI_TRANSITIONS=113} [2024-06-27 19:45:43,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-27 19:45:43,572 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 113 transitions, 787 flow [2024-06-27 19:45:43,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:43,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:43,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:43,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:45:43,573 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:43,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash -247806069, now seen corresponding path program 1 times [2024-06-27 19:45:43,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:43,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185371605] [2024-06-27 19:45:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:44,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185371605] [2024-06-27 19:45:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185371605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:44,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:44,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038050975] [2024-06-27 19:45:44,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:44,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:44,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 113 transitions, 787 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:44,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:44,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:45,514 INFO L124 PetriNetUnfolderBase]: 2042/3089 cut-off events. [2024-06-27 19:45:45,514 INFO L125 PetriNetUnfolderBase]: For 34752/34756 co-relation queries the response was YES. [2024-06-27 19:45:45,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14361 conditions, 3089 events. 2042/3089 cut-off events. For 34752/34756 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15189 event pairs, 707 based on Foata normal form. 6/3094 useless extension candidates. Maximal degree in co-relation 14326. Up to 2929 conditions per place. [2024-06-27 19:45:45,529 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2024-06-27 19:45:45,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1217 flow [2024-06-27 19:45:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:45:45,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:45:45,531 INFO L175 Difference]: Start difference. First operand has 84 places, 113 transitions, 787 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:45:45,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1217 flow [2024-06-27 19:45:45,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1191 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:45:45,557 INFO L231 Difference]: Finished difference. Result has 89 places, 116 transitions, 855 flow [2024-06-27 19:45:45,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=89, PETRI_TRANSITIONS=116} [2024-06-27 19:45:45,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-27 19:45:45,558 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 116 transitions, 855 flow [2024-06-27 19:45:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:45,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:45,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:45:45,559 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)] === [2024-06-27 19:45:45,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash 636581575, now seen corresponding path program 1 times [2024-06-27 19:45:45,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:45,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065206399] [2024-06-27 19:45:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:45,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:46,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065206399] [2024-06-27 19:45:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065206399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:46,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:46,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:46,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549464153] [2024-06-27 19:45:46,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:46,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:46,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:46,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:46,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 116 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:46,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:46,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:46,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:47,354 INFO L124 PetriNetUnfolderBase]: 2064/3122 cut-off events. [2024-06-27 19:45:47,354 INFO L125 PetriNetUnfolderBase]: For 39985/39989 co-relation queries the response was YES. [2024-06-27 19:45:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15185 conditions, 3122 events. 2064/3122 cut-off events. For 39985/39989 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15331 event pairs, 640 based on Foata normal form. 8/3125 useless extension candidates. Maximal degree in co-relation 15149. Up to 2710 conditions per place. [2024-06-27 19:45:47,369 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2024-06-27 19:45:47,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 158 transitions, 1399 flow [2024-06-27 19:45:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:45:47,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-27 19:45:47,371 INFO L175 Difference]: Start difference. First operand has 89 places, 116 transitions, 855 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:45:47,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 158 transitions, 1399 flow [2024-06-27 19:45:47,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1329 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:45:47,406 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 995 flow [2024-06-27 19:45:47,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=995, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-27 19:45:47,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-27 19:45:47,407 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 995 flow [2024-06-27 19:45:47,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:47,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:47,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:47,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:45:47,408 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:47,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1999484329, now seen corresponding path program 2 times [2024-06-27 19:45:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:47,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505015821] [2024-06-27 19:45:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:47,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:48,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:48,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505015821] [2024-06-27 19:45:48,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505015821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:48,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:48,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:48,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346499626] [2024-06-27 19:45:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:48,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:48,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:48,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 995 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:48,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:48,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:48,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:49,131 INFO L124 PetriNetUnfolderBase]: 2075/3145 cut-off events. [2024-06-27 19:45:49,131 INFO L125 PetriNetUnfolderBase]: For 45328/45335 co-relation queries the response was YES. [2024-06-27 19:45:49,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 3145 events. 2075/3145 cut-off events. For 45328/45335 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15572 event pairs, 691 based on Foata normal form. 8/3151 useless extension candidates. Maximal degree in co-relation 15989. Up to 2827 conditions per place. [2024-06-27 19:45:49,146 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-27 19:45:49,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 161 transitions, 1561 flow [2024-06-27 19:45:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:45:49,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:45:49,148 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 995 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:45:49,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 161 transitions, 1561 flow [2024-06-27 19:45:49,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 161 transitions, 1484 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:49,182 INFO L231 Difference]: Finished difference. Result has 95 places, 128 transitions, 1136 flow [2024-06-27 19:45:49,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=95, PETRI_TRANSITIONS=128} [2024-06-27 19:45:49,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-27 19:45:49,184 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 128 transitions, 1136 flow [2024-06-27 19:45:49,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:49,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:49,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:45:49,185 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:49,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:49,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1994842699, now seen corresponding path program 3 times [2024-06-27 19:45:49,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:49,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231707405] [2024-06-27 19:45:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:50,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231707405] [2024-06-27 19:45:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231707405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143458730] [2024-06-27 19:45:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:50,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:50,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 128 transitions, 1136 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:50,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:50,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:50,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:50,889 INFO L124 PetriNetUnfolderBase]: 2086/3166 cut-off events. [2024-06-27 19:45:50,889 INFO L125 PetriNetUnfolderBase]: For 51298/51301 co-relation queries the response was YES. [2024-06-27 19:45:50,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16839 conditions, 3166 events. 2086/3166 cut-off events. For 51298/51301 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15706 event pairs, 698 based on Foata normal form. 4/3168 useless extension candidates. Maximal degree in co-relation 16800. Up to 2839 conditions per place. [2024-06-27 19:45:50,907 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-27 19:45:50,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 161 transitions, 1660 flow [2024-06-27 19:45:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:45:50,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:45:50,909 INFO L175 Difference]: Start difference. First operand has 95 places, 128 transitions, 1136 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:45:50,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 161 transitions, 1660 flow [2024-06-27 19:45:50,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 161 transitions, 1573 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:50,951 INFO L231 Difference]: Finished difference. Result has 99 places, 131 transitions, 1227 flow [2024-06-27 19:45:50,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1227, PETRI_PLACES=99, PETRI_TRANSITIONS=131} [2024-06-27 19:45:50,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 19:45:50,952 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 131 transitions, 1227 flow [2024-06-27 19:45:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:50,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:50,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:45:50,952 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:50,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1994836003, now seen corresponding path program 2 times [2024-06-27 19:45:50,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:50,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554533114] [2024-06-27 19:45:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554533114] [2024-06-27 19:45:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554533114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:51,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:51,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:51,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323469661] [2024-06-27 19:45:51,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:51,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:51,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:51,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 1227 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:51,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:51,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:51,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:52,719 INFO L124 PetriNetUnfolderBase]: 2140/3244 cut-off events. [2024-06-27 19:45:52,719 INFO L125 PetriNetUnfolderBase]: For 57393/57393 co-relation queries the response was YES. [2024-06-27 19:45:52,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17642 conditions, 3244 events. 2140/3244 cut-off events. For 57393/57393 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16138 event pairs, 642 based on Foata normal form. 4/3243 useless extension candidates. Maximal degree in co-relation 17601. Up to 2788 conditions per place. [2024-06-27 19:45:52,740 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 69 changer transitions 0/171 dead transitions. [2024-06-27 19:45:52,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 171 transitions, 1869 flow [2024-06-27 19:45:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:45:52,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-27 19:45:52,742 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 1227 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:45:52,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 171 transitions, 1869 flow [2024-06-27 19:45:52,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1751 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:52,784 INFO L231 Difference]: Finished difference. Result has 102 places, 137 transitions, 1319 flow [2024-06-27 19:45:52,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=102, PETRI_TRANSITIONS=137} [2024-06-27 19:45:52,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:45:52,785 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 137 transitions, 1319 flow [2024-06-27 19:45:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:52,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:52,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:52,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:45:52,786 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:52,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash 641223205, now seen corresponding path program 3 times [2024-06-27 19:45:52,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137239517] [2024-06-27 19:45:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:52,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:53,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137239517] [2024-06-27 19:45:53,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137239517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:53,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:53,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:53,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666258522] [2024-06-27 19:45:53,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:53,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:53,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:53,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 137 transitions, 1319 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:53,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:53,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:53,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:54,548 INFO L124 PetriNetUnfolderBase]: 2130/3235 cut-off events. [2024-06-27 19:45:54,548 INFO L125 PetriNetUnfolderBase]: For 62244/62244 co-relation queries the response was YES. [2024-06-27 19:45:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17863 conditions, 3235 events. 2130/3235 cut-off events. For 62244/62244 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16136 event pairs, 642 based on Foata normal form. 4/3234 useless extension candidates. Maximal degree in co-relation 17821. Up to 2780 conditions per place. [2024-06-27 19:45:54,566 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 66 changer transitions 0/171 dead transitions. [2024-06-27 19:45:54,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 171 transitions, 1831 flow [2024-06-27 19:45:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:45:54,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-27 19:45:54,568 INFO L175 Difference]: Start difference. First operand has 102 places, 137 transitions, 1319 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:45:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 171 transitions, 1831 flow [2024-06-27 19:45:54,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 171 transitions, 1703 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:54,614 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1333 flow [2024-06-27 19:45:54,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-27 19:45:54,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 19:45:54,614 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1333 flow [2024-06-27 19:45:54,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:54,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:54,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:54,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:45:54,615 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:54,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:54,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1738665641, now seen corresponding path program 4 times [2024-06-27 19:45:54,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:54,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784663723] [2024-06-27 19:45:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:54,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:55,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:55,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784663723] [2024-06-27 19:45:55,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784663723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:55,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:55,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:55,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859137363] [2024-06-27 19:45:55,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:55,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:55,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:55,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1333 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:55,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:55,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:55,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:56,277 INFO L124 PetriNetUnfolderBase]: 2125/3227 cut-off events. [2024-06-27 19:45:56,277 INFO L125 PetriNetUnfolderBase]: For 67055/67055 co-relation queries the response was YES. [2024-06-27 19:45:56,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18026 conditions, 3227 events. 2125/3227 cut-off events. For 67055/67055 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16021 event pairs, 714 based on Foata normal form. 2/3221 useless extension candidates. Maximal degree in co-relation 17983. Up to 2898 conditions per place. [2024-06-27 19:45:56,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/161 dead transitions. [2024-06-27 19:45:56,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1725 flow [2024-06-27 19:45:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:45:56,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:45:56,298 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1333 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:45:56,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1725 flow [2024-06-27 19:45:56,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1564 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:45:56,341 INFO L231 Difference]: Finished difference. Result has 107 places, 137 transitions, 1304 flow [2024-06-27 19:45:56,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1304, PETRI_PLACES=107, PETRI_TRANSITIONS=137} [2024-06-27 19:45:56,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 19:45:56,342 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 137 transitions, 1304 flow [2024-06-27 19:45:56,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:56,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:56,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:45:56,343 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)] === [2024-06-27 19:45:56,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash 124727551, now seen corresponding path program 4 times [2024-06-27 19:45:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005581224] [2024-06-27 19:45:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:56,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:57,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:57,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005581224] [2024-06-27 19:45:57,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005581224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:57,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:57,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:57,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999384194] [2024-06-27 19:45:57,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:57,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:57,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:57,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:57,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 137 transitions, 1304 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:57,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:57,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:57,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:58,112 INFO L124 PetriNetUnfolderBase]: 2147/3261 cut-off events. [2024-06-27 19:45:58,112 INFO L125 PetriNetUnfolderBase]: For 72846/72851 co-relation queries the response was YES. [2024-06-27 19:45:58,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18303 conditions, 3261 events. 2147/3261 cut-off events. For 72846/72851 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16230 event pairs, 645 based on Foata normal form. 8/3263 useless extension candidates. Maximal degree in co-relation 18259. Up to 2792 conditions per place. [2024-06-27 19:45:58,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 77 changer transitions 0/169 dead transitions. [2024-06-27 19:45:58,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 169 transitions, 1839 flow [2024-06-27 19:45:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:45:58,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:45:58,131 INFO L175 Difference]: Start difference. First operand has 107 places, 137 transitions, 1304 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:45:58,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 169 transitions, 1839 flow [2024-06-27 19:45:58,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 169 transitions, 1655 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:45:58,179 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1317 flow [2024-06-27 19:45:58,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-06-27 19:45:58,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 19:45:58,179 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1317 flow [2024-06-27 19:45:58,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:58,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:58,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:58,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:45:58,180 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:58,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash 116446831, now seen corresponding path program 5 times [2024-06-27 19:45:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:58,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288167562] [2024-06-27 19:45:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288167562] [2024-06-27 19:45:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288167562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:45:59,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945984028] [2024-06-27 19:45:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:45:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:45:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:45:59,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:45:59,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:59,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:59,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:45:59,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:59,882 INFO L124 PetriNetUnfolderBase]: 2169/3293 cut-off events. [2024-06-27 19:45:59,882 INFO L125 PetriNetUnfolderBase]: For 78555/78560 co-relation queries the response was YES. [2024-06-27 19:45:59,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18818 conditions, 3293 events. 2169/3293 cut-off events. For 78555/78560 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16414 event pairs, 641 based on Foata normal form. 8/3295 useless extension candidates. Maximal degree in co-relation 18773. Up to 2811 conditions per place. [2024-06-27 19:45:59,904 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 73 changer transitions 0/175 dead transitions. [2024-06-27 19:45:59,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 175 transitions, 1888 flow [2024-06-27 19:45:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:45:59,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:45:59,906 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1317 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:45:59,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 175 transitions, 1888 flow [2024-06-27 19:45:59,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 175 transitions, 1740 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:59,973 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1366 flow [2024-06-27 19:45:59,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-27 19:45:59,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 19:45:59,973 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1366 flow [2024-06-27 19:45:59,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:59,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:59,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:59,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:45:59,974 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:59,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 116453341, now seen corresponding path program 6 times [2024-06-27 19:45:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:59,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518406150] [2024-06-27 19:45:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518406150] [2024-06-27 19:46:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518406150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:00,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558498705] [2024-06-27 19:46:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:00,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:00,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:00,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:00,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:00,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:00,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:01,896 INFO L124 PetriNetUnfolderBase]: 2159/3279 cut-off events. [2024-06-27 19:46:01,896 INFO L125 PetriNetUnfolderBase]: For 83446/83451 co-relation queries the response was YES. [2024-06-27 19:46:01,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18906 conditions, 3279 events. 2159/3279 cut-off events. For 83446/83451 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16295 event pairs, 643 based on Foata normal form. 8/3281 useless extension candidates. Maximal degree in co-relation 18860. Up to 2803 conditions per place. [2024-06-27 19:46:01,916 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 72 changer transitions 0/172 dead transitions. [2024-06-27 19:46:01,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 172 transitions, 1790 flow [2024-06-27 19:46:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:46:01,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:46:01,918 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1366 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:46:01,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 172 transitions, 1790 flow [2024-06-27 19:46:01,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1558 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:01,983 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1286 flow [2024-06-27 19:46:01,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1286, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-27 19:46:01,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-27 19:46:01,984 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1286 flow [2024-06-27 19:46:01,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:01,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:01,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:01,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:46:01,984 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:01,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 125035381, now seen corresponding path program 1 times [2024-06-27 19:46:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:01,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092118220] [2024-06-27 19:46:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:01,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092118220] [2024-06-27 19:46:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092118220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37529588] [2024-06-27 19:46:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:03,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:03,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1286 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:03,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:03,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:03,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:04,408 INFO L124 PetriNetUnfolderBase]: 1767/2844 cut-off events. [2024-06-27 19:46:04,408 INFO L125 PetriNetUnfolderBase]: For 75947/75972 co-relation queries the response was YES. [2024-06-27 19:46:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16197 conditions, 2844 events. 1767/2844 cut-off events. For 75947/75972 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15163 event pairs, 548 based on Foata normal form. 29/2851 useless extension candidates. Maximal degree in co-relation 16150. Up to 2543 conditions per place. [2024-06-27 19:46:04,426 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 16 changer transitions 0/172 dead transitions. [2024-06-27 19:46:04,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 1726 flow [2024-06-27 19:46:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:46:04,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 19:46:04,428 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1286 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:46:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 1726 flow [2024-06-27 19:46:04,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1525 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:04,520 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1190 flow [2024-06-27 19:46:04,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1190, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2024-06-27 19:46:04,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 19:46:04,520 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1190 flow [2024-06-27 19:46:04,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:04,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:04,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:04,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:46:04,521 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:04,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 232426522, now seen corresponding path program 1 times [2024-06-27 19:46:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:04,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149365687] [2024-06-27 19:46:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:05,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:05,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149365687] [2024-06-27 19:46:05,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149365687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:05,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:05,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:05,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12400211] [2024-06-27 19:46:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:05,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:05,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:46:05,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 148 transitions, 1190 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:05,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:05,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:46:05,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:06,155 INFO L124 PetriNetUnfolderBase]: 1496/2571 cut-off events. [2024-06-27 19:46:06,156 INFO L125 PetriNetUnfolderBase]: For 78283/78301 co-relation queries the response was YES. [2024-06-27 19:46:06,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14807 conditions, 2571 events. 1496/2571 cut-off events. For 78283/78301 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14660 event pairs, 532 based on Foata normal form. 20/2586 useless extension candidates. Maximal degree in co-relation 14758. Up to 2112 conditions per place. [2024-06-27 19:46:06,173 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 96 selfloop transitions, 11 changer transitions 0/161 dead transitions. [2024-06-27 19:46:06,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 161 transitions, 1458 flow [2024-06-27 19:46:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 19:46:06,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 19:46:06,174 INFO L175 Difference]: Start difference. First operand has 112 places, 148 transitions, 1190 flow. Second operand 6 states and 128 transitions. [2024-06-27 19:46:06,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 161 transitions, 1458 flow [2024-06-27 19:46:06,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1399 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:06,239 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1191 flow [2024-06-27 19:46:06,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-06-27 19:46:06,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:46:06,240 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1191 flow [2024-06-27 19:46:06,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:06,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:06,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:06,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:46:06,241 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:06,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 907948120, now seen corresponding path program 1 times [2024-06-27 19:46:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:06,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514591754] [2024-06-27 19:46:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:07,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514591754] [2024-06-27 19:46:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514591754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:07,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119647564] [2024-06-27 19:46:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:07,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:07,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1191 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:07,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:07,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:07,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:08,219 INFO L124 PetriNetUnfolderBase]: 2164/3295 cut-off events. [2024-06-27 19:46:08,219 INFO L125 PetriNetUnfolderBase]: For 99036/99040 co-relation queries the response was YES. [2024-06-27 19:46:08,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19653 conditions, 3295 events. 2164/3295 cut-off events. For 99036/99040 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16476 event pairs, 656 based on Foata normal form. 8/3302 useless extension candidates. Maximal degree in co-relation 19603. Up to 3090 conditions per place. [2024-06-27 19:46:08,242 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2024-06-27 19:46:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 1735 flow [2024-06-27 19:46:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:46:08,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 19:46:08,243 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1191 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:46:08,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 1735 flow [2024-06-27 19:46:08,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 1697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:08,314 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1265 flow [2024-06-27 19:46:08,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1265, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-27 19:46:08,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-27 19:46:08,315 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1265 flow [2024-06-27 19:46:08,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:08,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:08,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:08,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:46:08,316 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)] === [2024-06-27 19:46:08,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 908097850, now seen corresponding path program 2 times [2024-06-27 19:46:08,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:08,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762453670] [2024-06-27 19:46:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:08,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:09,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762453670] [2024-06-27 19:46:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762453670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:09,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361135580] [2024-06-27 19:46:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:09,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:09,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:09,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1265 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:09,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:09,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:09,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:10,371 INFO L124 PetriNetUnfolderBase]: 2218/3384 cut-off events. [2024-06-27 19:46:10,371 INFO L125 PetriNetUnfolderBase]: For 108895/108902 co-relation queries the response was YES. [2024-06-27 19:46:10,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 3384 events. 2218/3384 cut-off events. For 108895/108902 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16982 event pairs, 593 based on Foata normal form. 8/3388 useless extension candidates. Maximal degree in co-relation 20809. Up to 2658 conditions per place. [2024-06-27 19:46:10,392 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 87 changer transitions 0/206 dead transitions. [2024-06-27 19:46:10,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 206 transitions, 2173 flow [2024-06-27 19:46:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:10,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:46:10,393 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1265 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:10,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 206 transitions, 2173 flow [2024-06-27 19:46:10,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 206 transitions, 2085 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:10,469 INFO L231 Difference]: Finished difference. Result has 120 places, 163 transitions, 1515 flow [2024-06-27 19:46:10,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1515, PETRI_PLACES=120, PETRI_TRANSITIONS=163} [2024-06-27 19:46:10,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-27 19:46:10,470 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 163 transitions, 1515 flow [2024-06-27 19:46:10,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:10,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:10,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:46:10,471 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:10,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1854470388, now seen corresponding path program 3 times [2024-06-27 19:46:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:10,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964930251] [2024-06-27 19:46:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:11,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964930251] [2024-06-27 19:46:11,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964930251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:11,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:11,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:11,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707196856] [2024-06-27 19:46:11,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:11,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:11,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:11,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 163 transitions, 1515 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:11,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:11,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:11,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:12,500 INFO L124 PetriNetUnfolderBase]: 2208/3370 cut-off events. [2024-06-27 19:46:12,500 INFO L125 PetriNetUnfolderBase]: For 116558/116565 co-relation queries the response was YES. [2024-06-27 19:46:12,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21400 conditions, 3370 events. 2208/3370 cut-off events. For 116558/116565 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16952 event pairs, 591 based on Foata normal form. 8/3374 useless extension candidates. Maximal degree in co-relation 21348. Up to 2650 conditions per place. [2024-06-27 19:46:12,523 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 86 changer transitions 0/205 dead transitions. [2024-06-27 19:46:12,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 205 transitions, 2167 flow [2024-06-27 19:46:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:12,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:46:12,525 INFO L175 Difference]: Start difference. First operand has 120 places, 163 transitions, 1515 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:12,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 205 transitions, 2167 flow [2024-06-27 19:46:12,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 205 transitions, 2031 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:12,630 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1559 flow [2024-06-27 19:46:12,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1559, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-27 19:46:12,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-27 19:46:12,630 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1559 flow [2024-06-27 19:46:12,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:12,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:12,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:12,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:46:12,631 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:12,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1596921224, now seen corresponding path program 4 times [2024-06-27 19:46:12,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:12,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019937751] [2024-06-27 19:46:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:12,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:13,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019937751] [2024-06-27 19:46:13,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019937751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:13,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052820156] [2024-06-27 19:46:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:13,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:13,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1559 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:13,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:13,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:13,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:14,608 INFO L124 PetriNetUnfolderBase]: 2262/3468 cut-off events. [2024-06-27 19:46:14,608 INFO L125 PetriNetUnfolderBase]: For 126013/126016 co-relation queries the response was YES. [2024-06-27 19:46:14,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22450 conditions, 3468 events. 2262/3468 cut-off events. For 126013/126016 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17619 event pairs, 601 based on Foata normal form. 4/3468 useless extension candidates. Maximal degree in co-relation 22396. Up to 2696 conditions per place. [2024-06-27 19:46:14,633 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 88 changer transitions 0/210 dead transitions. [2024-06-27 19:46:14,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 210 transitions, 2445 flow [2024-06-27 19:46:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:46:14,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:46:14,637 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1559 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:46:14,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 210 transitions, 2445 flow [2024-06-27 19:46:14,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 210 transitions, 2241 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:14,732 INFO L231 Difference]: Finished difference. Result has 126 places, 169 transitions, 1651 flow [2024-06-27 19:46:14,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=126, PETRI_TRANSITIONS=169} [2024-06-27 19:46:14,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 19:46:14,733 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 169 transitions, 1651 flow [2024-06-27 19:46:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:14,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:14,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:14,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:46:14,733 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:14,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash 913460230, now seen corresponding path program 5 times [2024-06-27 19:46:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:14,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831945434] [2024-06-27 19:46:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:14,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:15,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:15,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831945434] [2024-06-27 19:46:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831945434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:15,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:15,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:15,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854606712] [2024-06-27 19:46:15,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:15,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:15,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:15,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:15,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:15,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:15,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 169 transitions, 1651 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:15,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:15,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:15,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:16,778 INFO L124 PetriNetUnfolderBase]: 2284/3510 cut-off events. [2024-06-27 19:46:16,778 INFO L125 PetriNetUnfolderBase]: For 133831/133834 co-relation queries the response was YES. [2024-06-27 19:46:16,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22876 conditions, 3510 events. 2284/3510 cut-off events. For 133831/133834 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17903 event pairs, 608 based on Foata normal form. 4/3510 useless extension candidates. Maximal degree in co-relation 22821. Up to 2715 conditions per place. [2024-06-27 19:46:16,800 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 90 changer transitions 0/213 dead transitions. [2024-06-27 19:46:16,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 213 transitions, 2495 flow [2024-06-27 19:46:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 19:46:16,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-27 19:46:16,802 INFO L175 Difference]: Start difference. First operand has 126 places, 169 transitions, 1651 flow. Second operand 9 states and 190 transitions. [2024-06-27 19:46:16,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 213 transitions, 2495 flow [2024-06-27 19:46:16,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 213 transitions, 2316 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:16,923 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1716 flow [2024-06-27 19:46:16,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1716, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-27 19:46:16,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-27 19:46:16,924 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1716 flow [2024-06-27 19:46:16,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:16,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:16,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:46:16,924 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:16,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1710372468, now seen corresponding path program 6 times [2024-06-27 19:46:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446764120] [2024-06-27 19:46:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:17,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:17,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446764120] [2024-06-27 19:46:17,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446764120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:17,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:17,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:17,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881371342] [2024-06-27 19:46:17,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:17,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:17,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:17,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:17,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1716 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:17,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:17,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:17,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:18,921 INFO L124 PetriNetUnfolderBase]: 2274/3496 cut-off events. [2024-06-27 19:46:18,922 INFO L125 PetriNetUnfolderBase]: For 139946/139949 co-relation queries the response was YES. [2024-06-27 19:46:18,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22854 conditions, 3496 events. 2274/3496 cut-off events. For 139946/139949 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17848 event pairs, 613 based on Foata normal form. 4/3496 useless extension candidates. Maximal degree in co-relation 22798. Up to 2707 conditions per place. [2024-06-27 19:46:18,948 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 109 selfloop transitions, 95 changer transitions 0/209 dead transitions. [2024-06-27 19:46:18,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 209 transitions, 2366 flow [2024-06-27 19:46:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:46:18,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 19:46:18,952 INFO L175 Difference]: Start difference. First operand has 130 places, 172 transitions, 1716 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:46:18,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 209 transitions, 2366 flow [2024-06-27 19:46:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 2182 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:19,101 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 1730 flow [2024-06-27 19:46:19,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1730, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-06-27 19:46:19,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-27 19:46:19,102 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 1730 flow [2024-06-27 19:46:19,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:19,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:19,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:46:19,103 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:19,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:19,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1398059147, now seen corresponding path program 1 times [2024-06-27 19:46:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103074150] [2024-06-27 19:46:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:19,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:19,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103074150] [2024-06-27 19:46:19,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103074150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:19,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:19,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:19,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124006843] [2024-06-27 19:46:19,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:19,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:19,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:19,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:19,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:19,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 1730 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:19,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:19,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:20,423 INFO L124 PetriNetUnfolderBase]: 1963/3159 cut-off events. [2024-06-27 19:46:20,423 INFO L125 PetriNetUnfolderBase]: For 144901/144905 co-relation queries the response was YES. [2024-06-27 19:46:20,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21321 conditions, 3159 events. 1963/3159 cut-off events. For 144901/144905 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17159 event pairs, 609 based on Foata normal form. 5/3142 useless extension candidates. Maximal degree in co-relation 21264. Up to 2782 conditions per place. [2024-06-27 19:46:20,448 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 135 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2024-06-27 19:46:20,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2106 flow [2024-06-27 19:46:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 19:46:20,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:46:20,449 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 1730 flow. Second operand 6 states and 123 transitions. [2024-06-27 19:46:20,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2106 flow [2024-06-27 19:46:20,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 191 transitions, 1885 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:46:20,572 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1574 flow [2024-06-27 19:46:20,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1574, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-06-27 19:46:20,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 19:46:20,573 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1574 flow [2024-06-27 19:46:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:20,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:20,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:20,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:46:20,573 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:20,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1930909298, now seen corresponding path program 7 times [2024-06-27 19:46:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:20,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351319848] [2024-06-27 19:46:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:21,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:21,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351319848] [2024-06-27 19:46:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351319848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:21,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535477679] [2024-06-27 19:46:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:21,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:21,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1574 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:21,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:21,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:21,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:22,519 INFO L124 PetriNetUnfolderBase]: 2333/3600 cut-off events. [2024-06-27 19:46:22,520 INFO L125 PetriNetUnfolderBase]: For 157829/157829 co-relation queries the response was YES. [2024-06-27 19:46:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23812 conditions, 3600 events. 2333/3600 cut-off events. For 157829/157829 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18556 event pairs, 622 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 23754. Up to 2760 conditions per place. [2024-06-27 19:46:22,601 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 96 changer transitions 0/219 dead transitions. [2024-06-27 19:46:22,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 219 transitions, 2496 flow [2024-06-27 19:46:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 19:46:22,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 19:46:22,602 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1574 flow. Second operand 9 states and 186 transitions. [2024-06-27 19:46:22,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 219 transitions, 2496 flow [2024-06-27 19:46:22,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 219 transitions, 2455 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:22,757 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 1845 flow [2024-06-27 19:46:22,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1845, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-06-27 19:46:22,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-27 19:46:22,758 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 1845 flow [2024-06-27 19:46:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:22,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:22,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:46:22,758 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:22,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 354372098, now seen corresponding path program 8 times [2024-06-27 19:46:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:22,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689954085] [2024-06-27 19:46:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:22,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:23,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:23,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689954085] [2024-06-27 19:46:23,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689954085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:23,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:23,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205085048] [2024-06-27 19:46:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:23,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:23,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:23,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:23,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 1845 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:23,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:23,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:23,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:24,831 INFO L124 PetriNetUnfolderBase]: 2355/3637 cut-off events. [2024-06-27 19:46:24,831 INFO L125 PetriNetUnfolderBase]: For 168644/168644 co-relation queries the response was YES. [2024-06-27 19:46:24,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24689 conditions, 3637 events. 2355/3637 cut-off events. For 168644/168644 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18789 event pairs, 615 based on Foata normal form. 4/3633 useless extension candidates. Maximal degree in co-relation 24630. Up to 2779 conditions per place. [2024-06-27 19:46:24,861 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 100 changer transitions 0/223 dead transitions. [2024-06-27 19:46:24,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 2739 flow [2024-06-27 19:46:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:46:24,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 19:46:24,863 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 1845 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:46:24,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 2739 flow [2024-06-27 19:46:24,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 223 transitions, 2447 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:24,980 INFO L231 Difference]: Finished difference. Result has 138 places, 184 transitions, 1823 flow [2024-06-27 19:46:24,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1823, PETRI_PLACES=138, PETRI_TRANSITIONS=184} [2024-06-27 19:46:24,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 19:46:24,981 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 184 transitions, 1823 flow [2024-06-27 19:46:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:24,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:24,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:46:24,981 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:24,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -685119634, now seen corresponding path program 9 times [2024-06-27 19:46:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:24,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172700839] [2024-06-27 19:46:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:25,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172700839] [2024-06-27 19:46:25,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172700839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:25,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:25,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:25,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131320778] [2024-06-27 19:46:25,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:25,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:25,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:26,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:26,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 184 transitions, 1823 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:26,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:26,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:26,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:27,035 INFO L124 PetriNetUnfolderBase]: 2345/3623 cut-off events. [2024-06-27 19:46:27,036 INFO L125 PetriNetUnfolderBase]: For 172635/172635 co-relation queries the response was YES. [2024-06-27 19:46:27,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24605 conditions, 3623 events. 2345/3623 cut-off events. For 172635/172635 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18768 event pairs, 613 based on Foata normal form. 4/3619 useless extension candidates. Maximal degree in co-relation 24545. Up to 2771 conditions per place. [2024-06-27 19:46:27,062 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-27 19:46:27,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 221 transitions, 2517 flow [2024-06-27 19:46:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:46:27,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 19:46:27,064 INFO L175 Difference]: Start difference. First operand has 138 places, 184 transitions, 1823 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:46:27,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 221 transitions, 2517 flow [2024-06-27 19:46:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 221 transitions, 2219 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:27,174 INFO L231 Difference]: Finished difference. Result has 140 places, 184 transitions, 1737 flow [2024-06-27 19:46:27,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=140, PETRI_TRANSITIONS=184} [2024-06-27 19:46:27,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-27 19:46:27,174 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 184 transitions, 1737 flow [2024-06-27 19:46:27,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:27,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:27,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:46:27,175 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:27,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash 611074418, now seen corresponding path program 10 times [2024-06-27 19:46:27,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:27,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589853381] [2024-06-27 19:46:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:27,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589853381] [2024-06-27 19:46:28,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589853381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:28,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:28,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:28,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726870894] [2024-06-27 19:46:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:28,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:28,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:28,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:28,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 184 transitions, 1737 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:28,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:28,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:29,122 INFO L124 PetriNetUnfolderBase]: 2335/3609 cut-off events. [2024-06-27 19:46:29,122 INFO L125 PetriNetUnfolderBase]: For 177508/177508 co-relation queries the response was YES. [2024-06-27 19:46:29,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24466 conditions, 3609 events. 2335/3609 cut-off events. For 177508/177508 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18615 event pairs, 630 based on Foata normal form. 4/3605 useless extension candidates. Maximal degree in co-relation 24405. Up to 2763 conditions per place. [2024-06-27 19:46:29,154 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 110 changer transitions 0/216 dead transitions. [2024-06-27 19:46:29,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 216 transitions, 2263 flow [2024-06-27 19:46:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:46:29,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:46:29,155 INFO L175 Difference]: Start difference. First operand has 140 places, 184 transitions, 1737 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:46:29,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 216 transitions, 2263 flow [2024-06-27 19:46:29,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 216 transitions, 2033 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:29,300 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1735 flow [2024-06-27 19:46:29,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1735, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-27 19:46:29,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 19:46:29,301 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1735 flow [2024-06-27 19:46:29,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:29,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:29,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:29,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:46:29,301 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)] === [2024-06-27 19:46:29,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1384726667, now seen corresponding path program 2 times [2024-06-27 19:46:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:29,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184509634] [2024-06-27 19:46:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:29,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:30,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184509634] [2024-06-27 19:46:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184509634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:30,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:30,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678737009] [2024-06-27 19:46:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:30,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1735 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:30,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:30,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:30,616 INFO L124 PetriNetUnfolderBase]: 1991/3234 cut-off events. [2024-06-27 19:46:30,616 INFO L125 PetriNetUnfolderBase]: For 181871/181884 co-relation queries the response was YES. [2024-06-27 19:46:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22808 conditions, 3234 events. 1991/3234 cut-off events. For 181871/181884 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17829 event pairs, 612 based on Foata normal form. 11/3221 useless extension candidates. Maximal degree in co-relation 22746. Up to 2824 conditions per place. [2024-06-27 19:46:30,644 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 137 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-27 19:46:30,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2115 flow [2024-06-27 19:46:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:46:30,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:46:30,645 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1735 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:46:30,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2115 flow [2024-06-27 19:46:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 1831 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:46:30,815 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 1531 flow [2024-06-27 19:46:30,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-27 19:46:30,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 19:46:30,816 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 1531 flow [2024-06-27 19:46:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:46:30,817 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash -189258275, now seen corresponding path program 1 times [2024-06-27 19:46:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:30,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470993701] [2024-06-27 19:46:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:31,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470993701] [2024-06-27 19:46:31,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470993701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:31,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:31,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:31,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288693045] [2024-06-27 19:46:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:31,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:31,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:31,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 1531 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:31,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:31,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:31,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:32,112 INFO L124 PetriNetUnfolderBase]: 1972/3209 cut-off events. [2024-06-27 19:46:32,113 INFO L125 PetriNetUnfolderBase]: For 163530/163555 co-relation queries the response was YES. [2024-06-27 19:46:32,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21282 conditions, 3209 events. 1972/3209 cut-off events. For 163530/163555 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17670 event pairs, 563 based on Foata normal form. 26/3213 useless extension candidates. Maximal degree in co-relation 21219. Up to 2851 conditions per place. [2024-06-27 19:46:32,139 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 173 selfloop transitions, 11 changer transitions 0/202 dead transitions. [2024-06-27 19:46:32,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 1969 flow [2024-06-27 19:46:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 19:46:32,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:46:32,140 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 1531 flow. Second operand 6 states and 120 transitions. [2024-06-27 19:46:32,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 1969 flow [2024-06-27 19:46:32,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 1911 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:32,291 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1541 flow [2024-06-27 19:46:32,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1541, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-27 19:46:32,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-27 19:46:32,292 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1541 flow [2024-06-27 19:46:32,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:32,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:32,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:32,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:46:32,292 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:32,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:32,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1384719723, now seen corresponding path program 2 times [2024-06-27 19:46:32,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:32,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941864248] [2024-06-27 19:46:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:32,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:33,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:33,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941864248] [2024-06-27 19:46:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941864248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:33,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344701476] [2024-06-27 19:46:33,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:33,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:33,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:33,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1541 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:33,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:33,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:33,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:33,659 INFO L124 PetriNetUnfolderBase]: 1969/3206 cut-off events. [2024-06-27 19:46:33,659 INFO L125 PetriNetUnfolderBase]: For 169916/169944 co-relation queries the response was YES. [2024-06-27 19:46:33,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3206 events. 1969/3206 cut-off events. For 169916/169944 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17681 event pairs, 567 based on Foata normal form. 28/3211 useless extension candidates. Maximal degree in co-relation 21600. Up to 2841 conditions per place. [2024-06-27 19:46:33,684 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 168 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2024-06-27 19:46:33,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 202 transitions, 1975 flow [2024-06-27 19:46:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:46:33,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:46:33,685 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1541 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:46:33,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 202 transitions, 1975 flow [2024-06-27 19:46:33,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 202 transitions, 1929 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:33,877 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 1579 flow [2024-06-27 19:46:33,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1579, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-27 19:46:33,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 19:46:33,877 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 1579 flow [2024-06-27 19:46:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:33,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:33,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:46:33,881 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 682588392, now seen corresponding path program 1 times [2024-06-27 19:46:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806478967] [2024-06-27 19:46:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806478967] [2024-06-27 19:46:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806478967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:34,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:34,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:34,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576556531] [2024-06-27 19:46:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:35,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:35,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 1579 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:35,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:35,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:35,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:35,890 INFO L124 PetriNetUnfolderBase]: 2376/3672 cut-off events. [2024-06-27 19:46:35,890 INFO L125 PetriNetUnfolderBase]: For 213514/213518 co-relation queries the response was YES. [2024-06-27 19:46:35,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26258 conditions, 3672 events. 2376/3672 cut-off events. For 213514/213518 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19030 event pairs, 481 based on Foata normal form. 8/3679 useless extension candidates. Maximal degree in co-relation 26193. Up to 3345 conditions per place. [2024-06-27 19:46:35,919 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-27 19:46:35,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 242 transitions, 2443 flow [2024-06-27 19:46:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:46:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:46:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 19:46:35,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 19:46:35,920 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 1579 flow. Second operand 10 states and 194 transitions. [2024-06-27 19:46:35,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 242 transitions, 2443 flow [2024-06-27 19:46:36,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 242 transitions, 2381 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:36,098 INFO L231 Difference]: Finished difference. Result has 148 places, 197 transitions, 1684 flow [2024-06-27 19:46:36,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1684, PETRI_PLACES=148, PETRI_TRANSITIONS=197} [2024-06-27 19:46:36,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 19:46:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 197 transitions, 1684 flow [2024-06-27 19:46:36,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:36,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:36,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:46:36,099 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:36,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1918382614, now seen corresponding path program 2 times [2024-06-27 19:46:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:36,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995575956] [2024-06-27 19:46:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:37,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:37,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995575956] [2024-06-27 19:46:37,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995575956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:37,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:37,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:37,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124914901] [2024-06-27 19:46:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:37,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:37,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:37,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:37,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 197 transitions, 1684 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:37,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:37,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:37,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:38,130 INFO L124 PetriNetUnfolderBase]: 2368/3660 cut-off events. [2024-06-27 19:46:38,130 INFO L125 PetriNetUnfolderBase]: For 221633/221637 co-relation queries the response was YES. [2024-06-27 19:46:38,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26529 conditions, 3660 events. 2368/3660 cut-off events. For 221633/221637 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18956 event pairs, 620 based on Foata normal form. 8/3667 useless extension candidates. Maximal degree in co-relation 26463. Up to 3392 conditions per place. [2024-06-27 19:46:38,157 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 26 changer transitions 0/235 dead transitions. [2024-06-27 19:46:38,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 235 transitions, 2268 flow [2024-06-27 19:46:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:46:38,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:46:38,158 INFO L175 Difference]: Start difference. First operand has 148 places, 197 transitions, 1684 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:46:38,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 235 transitions, 2268 flow [2024-06-27 19:46:38,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 235 transitions, 2150 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:38,331 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 1625 flow [2024-06-27 19:46:38,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1625, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-06-27 19:46:38,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-27 19:46:38,332 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 1625 flow [2024-06-27 19:46:38,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:38,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:38,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:38,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:46:38,333 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:38,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1869407212, now seen corresponding path program 3 times [2024-06-27 19:46:38,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:38,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120451748] [2024-06-27 19:46:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:38,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:39,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120451748] [2024-06-27 19:46:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120451748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:39,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746674452] [2024-06-27 19:46:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:39,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:39,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:39,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 1625 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:39,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:39,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:39,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:40,340 INFO L124 PetriNetUnfolderBase]: 2385/3688 cut-off events. [2024-06-27 19:46:40,340 INFO L125 PetriNetUnfolderBase]: For 232777/232784 co-relation queries the response was YES. [2024-06-27 19:46:40,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26814 conditions, 3688 events. 2385/3688 cut-off events. For 232777/232784 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19152 event pairs, 626 based on Foata normal form. 10/3696 useless extension candidates. Maximal degree in co-relation 26746. Up to 3267 conditions per place. [2024-06-27 19:46:40,368 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 164 selfloop transitions, 66 changer transitions 0/235 dead transitions. [2024-06-27 19:46:40,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 235 transitions, 2255 flow [2024-06-27 19:46:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 19:46:40,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 19:46:40,370 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 1625 flow. Second operand 9 states and 176 transitions. [2024-06-27 19:46:40,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 235 transitions, 2255 flow [2024-06-27 19:46:40,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 235 transitions, 2198 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:40,548 INFO L231 Difference]: Finished difference. Result has 152 places, 199 transitions, 1763 flow [2024-06-27 19:46:40,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1763, PETRI_PLACES=152, PETRI_TRANSITIONS=199} [2024-06-27 19:46:40,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 19:46:40,549 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 199 transitions, 1763 flow [2024-06-27 19:46:40,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:40,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:40,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:40,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:46:40,550 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:40,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1516134099, now seen corresponding path program 1 times [2024-06-27 19:46:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:40,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786843719] [2024-06-27 19:46:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:41,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:41,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786843719] [2024-06-27 19:46:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786843719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:41,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:41,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921090861] [2024-06-27 19:46:41,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:41,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:41,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:41,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 199 transitions, 1763 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:41,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:41,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:41,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:42,049 INFO L124 PetriNetUnfolderBase]: 2050/3327 cut-off events. [2024-06-27 19:46:42,049 INFO L125 PetriNetUnfolderBase]: For 238559/238569 co-relation queries the response was YES. [2024-06-27 19:46:42,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25252 conditions, 3327 events. 2050/3327 cut-off events. For 238559/238569 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18427 event pairs, 588 based on Foata normal form. 6/3310 useless extension candidates. Maximal degree in co-relation 25183. Up to 2849 conditions per place. [2024-06-27 19:46:42,078 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 157 selfloop transitions, 21 changer transitions 0/226 dead transitions. [2024-06-27 19:46:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 2243 flow [2024-06-27 19:46:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 19:46:42,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-27 19:46:42,079 INFO L175 Difference]: Start difference. First operand has 152 places, 199 transitions, 1763 flow. Second operand 7 states and 145 transitions. [2024-06-27 19:46:42,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 2243 flow [2024-06-27 19:46:42,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 226 transitions, 2066 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:42,294 INFO L231 Difference]: Finished difference. Result has 152 places, 202 transitions, 1685 flow [2024-06-27 19:46:42,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1685, PETRI_PLACES=152, PETRI_TRANSITIONS=202} [2024-06-27 19:46:42,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 19:46:42,295 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 202 transitions, 1685 flow [2024-06-27 19:46:42,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:42,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:42,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:42,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:46:42,295 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)] === [2024-06-27 19:46:42,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1488371308, now seen corresponding path program 4 times [2024-06-27 19:46:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395176559] [2024-06-27 19:46:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395176559] [2024-06-27 19:46:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395176559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:43,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:43,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:43,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005473154] [2024-06-27 19:46:43,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:43,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:43,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:43,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 202 transitions, 1685 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:43,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:43,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:43,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:44,307 INFO L124 PetriNetUnfolderBase]: 2412/3731 cut-off events. [2024-06-27 19:46:44,307 INFO L125 PetriNetUnfolderBase]: For 254335/254338 co-relation queries the response was YES. [2024-06-27 19:46:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27916 conditions, 3731 events. 2412/3731 cut-off events. For 254335/254338 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19440 event pairs, 627 based on Foata normal form. 6/3735 useless extension candidates. Maximal degree in co-relation 27846. Up to 3308 conditions per place. [2024-06-27 19:46:44,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 169 selfloop transitions, 63 changer transitions 0/237 dead transitions. [2024-06-27 19:46:44,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 237 transitions, 2311 flow [2024-06-27 19:46:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:46:44,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:46:44,342 INFO L175 Difference]: Start difference. First operand has 152 places, 202 transitions, 1685 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:46:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 237 transitions, 2311 flow [2024-06-27 19:46:44,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 237 transitions, 2240 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:44,530 INFO L231 Difference]: Finished difference. Result has 156 places, 204 transitions, 1807 flow [2024-06-27 19:46:44,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1807, PETRI_PLACES=156, PETRI_TRANSITIONS=204} [2024-06-27 19:46:44,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-27 19:46:44,530 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 204 transitions, 1807 flow [2024-06-27 19:46:44,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:44,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:44,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:44,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:46:44,531 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)] === [2024-06-27 19:46:44,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:44,531 INFO L85 PathProgramCache]: Analyzing trace with hash 273131638, now seen corresponding path program 1 times [2024-06-27 19:46:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92784505] [2024-06-27 19:46:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:44,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:45,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:45,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92784505] [2024-06-27 19:46:45,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92784505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:45,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:45,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463090822] [2024-06-27 19:46:45,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:45,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:45,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:45,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:45,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:45,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 204 transitions, 1807 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:45,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:45,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:45,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:46,638 INFO L124 PetriNetUnfolderBase]: 2429/3758 cut-off events. [2024-06-27 19:46:46,638 INFO L125 PetriNetUnfolderBase]: For 267778/267785 co-relation queries the response was YES. [2024-06-27 19:46:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28619 conditions, 3758 events. 2429/3758 cut-off events. For 267778/267785 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19635 event pairs, 591 based on Foata normal form. 8/3762 useless extension candidates. Maximal degree in co-relation 28548. Up to 3431 conditions per place. [2024-06-27 19:46:46,673 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 40 changer transitions 0/243 dead transitions. [2024-06-27 19:46:46,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 243 transitions, 2463 flow [2024-06-27 19:46:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:46:46,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:46:46,675 INFO L175 Difference]: Start difference. First operand has 156 places, 204 transitions, 1807 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:46:46,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 243 transitions, 2463 flow [2024-06-27 19:46:46,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 243 transitions, 2288 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:46,947 INFO L231 Difference]: Finished difference. Result has 159 places, 209 transitions, 1798 flow [2024-06-27 19:46:46,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1798, PETRI_PLACES=159, PETRI_TRANSITIONS=209} [2024-06-27 19:46:46,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-27 19:46:46,948 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 209 transitions, 1798 flow [2024-06-27 19:46:46,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:46,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:46,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:46,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:46:46,948 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:46,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1515776049, now seen corresponding path program 2 times [2024-06-27 19:46:46,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:46,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648675475] [2024-06-27 19:46:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:47,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648675475] [2024-06-27 19:46:47,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648675475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:47,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:47,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:47,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697733825] [2024-06-27 19:46:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:47,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:47,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:47,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:47,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 209 transitions, 1798 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:47,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:47,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:47,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:48,523 INFO L124 PetriNetUnfolderBase]: 2087/3390 cut-off events. [2024-06-27 19:46:48,523 INFO L125 PetriNetUnfolderBase]: For 270645/270653 co-relation queries the response was YES. [2024-06-27 19:46:48,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26870 conditions, 3390 events. 2087/3390 cut-off events. For 270645/270653 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18766 event pairs, 567 based on Foata normal form. 1/3368 useless extension candidates. Maximal degree in co-relation 26797. Up to 2892 conditions per place. [2024-06-27 19:46:48,551 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 155 selfloop transitions, 25 changer transitions 0/229 dead transitions. [2024-06-27 19:46:48,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 229 transitions, 2260 flow [2024-06-27 19:46:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:46:48,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 19:46:48,555 INFO L175 Difference]: Start difference. First operand has 159 places, 209 transitions, 1798 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:46:48,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 229 transitions, 2260 flow [2024-06-27 19:46:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 229 transitions, 2137 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:48,751 INFO L231 Difference]: Finished difference. Result has 160 places, 212 transitions, 1785 flow [2024-06-27 19:46:48,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1785, PETRI_PLACES=160, PETRI_TRANSITIONS=212} [2024-06-27 19:46:48,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-27 19:46:48,751 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 212 transitions, 1785 flow [2024-06-27 19:46:48,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:48,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:48,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:48,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:46:48,752 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:48,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash 9338297, now seen corresponding path program 1 times [2024-06-27 19:46:48,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:48,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78591156] [2024-06-27 19:46:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:49,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78591156] [2024-06-27 19:46:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78591156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:49,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:49,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668514574] [2024-06-27 19:46:49,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:49,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:49,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:46:49,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 212 transitions, 1785 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:49,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:49,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:46:49,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:50,502 INFO L124 PetriNetUnfolderBase]: 2089/3394 cut-off events. [2024-06-27 19:46:50,502 INFO L125 PetriNetUnfolderBase]: For 281703/281717 co-relation queries the response was YES. [2024-06-27 19:46:50,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27229 conditions, 3394 events. 2089/3394 cut-off events. For 281703/281717 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18825 event pairs, 566 based on Foata normal form. 5/3376 useless extension candidates. Maximal degree in co-relation 27155. Up to 2942 conditions per place. [2024-06-27 19:46:50,534 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 16 changer transitions 0/232 dead transitions. [2024-06-27 19:46:50,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 232 transitions, 2245 flow [2024-06-27 19:46:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:46:50,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 19:46:50,535 INFO L175 Difference]: Start difference. First operand has 160 places, 212 transitions, 1785 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:46:50,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 232 transitions, 2245 flow [2024-06-27 19:46:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 232 transitions, 2157 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:50,746 INFO L231 Difference]: Finished difference. Result has 162 places, 215 transitions, 1779 flow [2024-06-27 19:46:50,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1779, PETRI_PLACES=162, PETRI_TRANSITIONS=215} [2024-06-27 19:46:50,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-27 19:46:50,746 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 215 transitions, 1779 flow [2024-06-27 19:46:50,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:50,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:50,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:50,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:46:50,747 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1065655734, now seen corresponding path program 5 times [2024-06-27 19:46:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:50,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971716509] [2024-06-27 19:46:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:50,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971716509] [2024-06-27 19:46:51,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971716509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:51,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:51,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:51,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486425037] [2024-06-27 19:46:51,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:51,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:51,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:51,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 215 transitions, 1779 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:51,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:51,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:51,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:52,711 INFO L124 PetriNetUnfolderBase]: 2436/3768 cut-off events. [2024-06-27 19:46:52,712 INFO L125 PetriNetUnfolderBase]: For 295418/295418 co-relation queries the response was YES. [2024-06-27 19:46:52,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29717 conditions, 3768 events. 2436/3768 cut-off events. For 295418/295418 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19600 event pairs, 605 based on Foata normal form. 4/3764 useless extension candidates. Maximal degree in co-relation 29642. Up to 3344 conditions per place. [2024-06-27 19:46:52,743 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 178 selfloop transitions, 63 changer transitions 0/246 dead transitions. [2024-06-27 19:46:52,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 246 transitions, 2417 flow [2024-06-27 19:46:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 19:46:52,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:46:52,745 INFO L175 Difference]: Start difference. First operand has 162 places, 215 transitions, 1779 flow. Second operand 9 states and 171 transitions. [2024-06-27 19:46:52,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 246 transitions, 2417 flow [2024-06-27 19:46:53,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 2357 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:53,004 INFO L231 Difference]: Finished difference. Result has 166 places, 217 transitions, 1918 flow [2024-06-27 19:46:53,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1918, PETRI_PLACES=166, PETRI_TRANSITIONS=217} [2024-06-27 19:46:53,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 19:46:53,004 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 217 transitions, 1918 flow [2024-06-27 19:46:53,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:53,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:53,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:53,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:46:53,005 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:53,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2048785420, now seen corresponding path program 2 times [2024-06-27 19:46:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285362359] [2024-06-27 19:46:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:53,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:54,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285362359] [2024-06-27 19:46:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285362359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:54,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:54,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:54,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370722830] [2024-06-27 19:46:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:54,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:54,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:54,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:54,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 217 transitions, 1918 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:54,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:54,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:54,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:55,264 INFO L124 PetriNetUnfolderBase]: 2464/3818 cut-off events. [2024-06-27 19:46:55,264 INFO L125 PetriNetUnfolderBase]: For 308981/308994 co-relation queries the response was YES. [2024-06-27 19:46:55,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30560 conditions, 3818 events. 2464/3818 cut-off events. For 308981/308994 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20001 event pairs, 588 based on Foata normal form. 14/3829 useless extension candidates. Maximal degree in co-relation 30484. Up to 3479 conditions per place. [2024-06-27 19:46:55,298 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 50 changer transitions 0/258 dead transitions. [2024-06-27 19:46:55,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 258 transitions, 2639 flow [2024-06-27 19:46:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:46:55,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 19:46:55,300 INFO L175 Difference]: Start difference. First operand has 166 places, 217 transitions, 1918 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:46:55,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 258 transitions, 2639 flow [2024-06-27 19:46:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 2458 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:55,601 INFO L231 Difference]: Finished difference. Result has 169 places, 227 transitions, 1978 flow [2024-06-27 19:46:55,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1978, PETRI_PLACES=169, PETRI_TRANSITIONS=227} [2024-06-27 19:46:55,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-27 19:46:55,602 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 227 transitions, 1978 flow [2024-06-27 19:46:55,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:55,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:55,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:55,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:46:55,603 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:55,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -100038700, now seen corresponding path program 3 times [2024-06-27 19:46:55,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:55,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423735402] [2024-06-27 19:46:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:56,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:56,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423735402] [2024-06-27 19:46:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423735402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:56,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:56,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166563232] [2024-06-27 19:46:56,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:56,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:56,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:56,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:56,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 227 transitions, 1978 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:56,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:56,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:56,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:57,730 INFO L124 PetriNetUnfolderBase]: 2481/3850 cut-off events. [2024-06-27 19:46:57,730 INFO L125 PetriNetUnfolderBase]: For 322126/322135 co-relation queries the response was YES. [2024-06-27 19:46:57,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31248 conditions, 3850 events. 2481/3850 cut-off events. For 322126/322135 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20413 event pairs, 815 based on Foata normal form. 10/3857 useless extension candidates. Maximal degree in co-relation 31170. Up to 3418 conditions per place. [2024-06-27 19:46:57,767 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 60 changer transitions 0/267 dead transitions. [2024-06-27 19:46:57,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 267 transitions, 2940 flow [2024-06-27 19:46:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:46:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:46:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 19:46:57,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 19:46:57,768 INFO L175 Difference]: Start difference. First operand has 169 places, 227 transitions, 1978 flow. Second operand 10 states and 184 transitions. [2024-06-27 19:46:57,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 267 transitions, 2940 flow [2024-06-27 19:46:58,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 267 transitions, 2817 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:58,131 INFO L231 Difference]: Finished difference. Result has 176 places, 234 transitions, 2140 flow [2024-06-27 19:46:58,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2140, PETRI_PLACES=176, PETRI_TRANSITIONS=234} [2024-06-27 19:46:58,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 19:46:58,131 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 234 transitions, 2140 flow [2024-06-27 19:46:58,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:58,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:58,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:58,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:46:58,132 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:58,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash -395614090, now seen corresponding path program 4 times [2024-06-27 19:46:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411384055] [2024-06-27 19:46:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:59,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:59,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411384055] [2024-06-27 19:46:59,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411384055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:59,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:59,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:59,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621490] [2024-06-27 19:46:59,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:59,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:59,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:46:59,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 234 transitions, 2140 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:59,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:59,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:46:59,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:00,294 INFO L124 PetriNetUnfolderBase]: 2498/3877 cut-off events. [2024-06-27 19:47:00,294 INFO L125 PetriNetUnfolderBase]: For 334887/334896 co-relation queries the response was YES. [2024-06-27 19:47:00,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31447 conditions, 3877 events. 2498/3877 cut-off events. For 334887/334896 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20461 event pairs, 593 based on Foata normal form. 10/3884 useless extension candidates. Maximal degree in co-relation 31367. Up to 3533 conditions per place. [2024-06-27 19:47:00,329 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 50 changer transitions 0/266 dead transitions. [2024-06-27 19:47:00,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 266 transitions, 2831 flow [2024-06-27 19:47:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 19:47:00,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 19:47:00,330 INFO L175 Difference]: Start difference. First operand has 176 places, 234 transitions, 2140 flow. Second operand 9 states and 170 transitions. [2024-06-27 19:47:00,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 266 transitions, 2831 flow [2024-06-27 19:47:00,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 266 transitions, 2683 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:00,679 INFO L231 Difference]: Finished difference. Result has 182 places, 237 transitions, 2190 flow [2024-06-27 19:47:00,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2190, PETRI_PLACES=182, PETRI_TRANSITIONS=237} [2024-06-27 19:47:00,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 19:47:00,680 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 237 transitions, 2190 flow [2024-06-27 19:47:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:00,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:00,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:00,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:47:00,681 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:00,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1892862964, now seen corresponding path program 5 times [2024-06-27 19:47:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694893316] [2024-06-27 19:47:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694893316] [2024-06-27 19:47:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694893316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:01,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:01,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788896266] [2024-06-27 19:47:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:01,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:01,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:01,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:01,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 237 transitions, 2190 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:01,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:01,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:01,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:02,903 INFO L124 PetriNetUnfolderBase]: 2490/3871 cut-off events. [2024-06-27 19:47:02,903 INFO L125 PetriNetUnfolderBase]: For 340337/340346 co-relation queries the response was YES. [2024-06-27 19:47:02,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 3871 events. 2490/3871 cut-off events. For 340337/340346 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20478 event pairs, 596 based on Foata normal form. 10/3878 useless extension candidates. Maximal degree in co-relation 31243. Up to 3521 conditions per place. [2024-06-27 19:47:02,936 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 48 changer transitions 0/267 dead transitions. [2024-06-27 19:47:02,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 267 transitions, 2812 flow [2024-06-27 19:47:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 19:47:02,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:47:02,937 INFO L175 Difference]: Start difference. First operand has 182 places, 237 transitions, 2190 flow. Second operand 9 states and 171 transitions. [2024-06-27 19:47:02,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 267 transitions, 2812 flow [2024-06-27 19:47:03,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 267 transitions, 2643 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:03,274 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2124 flow [2024-06-27 19:47:03,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2124, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-27 19:47:03,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 19:47:03,275 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2124 flow [2024-06-27 19:47:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:03,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:03,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:03,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:47:03,275 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:03,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 23623097, now seen corresponding path program 2 times [2024-06-27 19:47:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699530846] [2024-06-27 19:47:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:04,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699530846] [2024-06-27 19:47:04,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699530846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:04,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:04,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:04,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426464903] [2024-06-27 19:47:04,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:04,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:04,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:04,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:04,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2124 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:04,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:04,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:05,028 INFO L124 PetriNetUnfolderBase]: 2140/3471 cut-off events. [2024-06-27 19:47:05,029 INFO L125 PetriNetUnfolderBase]: For 342120/342139 co-relation queries the response was YES. [2024-06-27 19:47:05,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29089 conditions, 3471 events. 2140/3471 cut-off events. For 342120/342139 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19307 event pairs, 567 based on Foata normal form. 7/3439 useless extension candidates. Maximal degree in co-relation 29004. Up to 3010 conditions per place. [2024-06-27 19:47:05,063 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 29 changer transitions 0/256 dead transitions. [2024-06-27 19:47:05,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 256 transitions, 2780 flow [2024-06-27 19:47:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:47:05,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:47:05,064 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2124 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:47:05,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 256 transitions, 2780 flow [2024-06-27 19:47:05,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 2621 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 19:47:05,423 INFO L231 Difference]: Finished difference. Result has 182 places, 245 transitions, 2154 flow [2024-06-27 19:47:05,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2154, PETRI_PLACES=182, PETRI_TRANSITIONS=245} [2024-06-27 19:47:05,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 19:47:05,424 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 245 transitions, 2154 flow [2024-06-27 19:47:05,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:05,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:05,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:47:05,424 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)] === [2024-06-27 19:47:05,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash 23147433, now seen corresponding path program 3 times [2024-06-27 19:47:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:05,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867686744] [2024-06-27 19:47:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:05,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:06,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:06,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867686744] [2024-06-27 19:47:06,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867686744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:06,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:06,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087002041] [2024-06-27 19:47:06,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:06,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:06,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 245 transitions, 2154 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:06,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:06,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:07,027 INFO L124 PetriNetUnfolderBase]: 2141/3475 cut-off events. [2024-06-27 19:47:07,027 INFO L125 PetriNetUnfolderBase]: For 353281/353281 co-relation queries the response was YES. [2024-06-27 19:47:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29340 conditions, 3475 events. 2141/3475 cut-off events. For 353281/353281 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19340 event pairs, 573 based on Foata normal form. 1/3441 useless extension candidates. Maximal degree in co-relation 29256. Up to 2970 conditions per place. [2024-06-27 19:47:07,060 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 32 changer transitions 0/259 dead transitions. [2024-06-27 19:47:07,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 259 transitions, 2666 flow [2024-06-27 19:47:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:47:07,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:47:07,061 INFO L175 Difference]: Start difference. First operand has 182 places, 245 transitions, 2154 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:47:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 259 transitions, 2666 flow [2024-06-27 19:47:07,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 259 transitions, 2596 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:47:07,397 INFO L231 Difference]: Finished difference. Result has 186 places, 248 transitions, 2218 flow [2024-06-27 19:47:07,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2218, PETRI_PLACES=186, PETRI_TRANSITIONS=248} [2024-06-27 19:47:07,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-27 19:47:07,398 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 248 transitions, 2218 flow [2024-06-27 19:47:07,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:07,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:07,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:07,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:47:07,398 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:07,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:07,398 INFO L85 PathProgramCache]: Analyzing trace with hash 23147867, now seen corresponding path program 3 times [2024-06-27 19:47:07,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:07,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245699083] [2024-06-27 19:47:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:07,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245699083] [2024-06-27 19:47:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245699083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:08,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:08,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454475253] [2024-06-27 19:47:08,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:08,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:08,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:08,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:08,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:08,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:08,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 248 transitions, 2218 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:08,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:08,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:08,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:09,038 INFO L124 PetriNetUnfolderBase]: 2134/3468 cut-off events. [2024-06-27 19:47:09,038 INFO L125 PetriNetUnfolderBase]: For 363859/363868 co-relation queries the response was YES. [2024-06-27 19:47:09,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29793 conditions, 3468 events. 2134/3468 cut-off events. For 363859/363868 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19339 event pairs, 567 based on Foata normal form. 7/3444 useless extension candidates. Maximal degree in co-relation 29707. Up to 3012 conditions per place. [2024-06-27 19:47:09,074 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 187 selfloop transitions, 22 changer transitions 0/259 dead transitions. [2024-06-27 19:47:09,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 259 transitions, 2673 flow [2024-06-27 19:47:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:09,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:47:09,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:47:09,075 INFO L175 Difference]: Start difference. First operand has 186 places, 248 transitions, 2218 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:47:09,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 259 transitions, 2673 flow [2024-06-27 19:47:09,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 259 transitions, 2533 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:09,447 INFO L231 Difference]: Finished difference. Result has 188 places, 249 transitions, 2137 flow [2024-06-27 19:47:09,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2078, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2137, PETRI_PLACES=188, PETRI_TRANSITIONS=249} [2024-06-27 19:47:09,447 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 19:47:09,448 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 249 transitions, 2137 flow [2024-06-27 19:47:09,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:09,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:09,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:09,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:47:09,448 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:09,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1572187592, now seen corresponding path program 1 times [2024-06-27 19:47:09,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:09,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471889374] [2024-06-27 19:47:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:09,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:10,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471889374] [2024-06-27 19:47:10,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471889374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:10,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:10,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:10,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838296771] [2024-06-27 19:47:10,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:10,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:10,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:10,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 249 transitions, 2137 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:10,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:10,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:10,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:11,021 INFO L124 PetriNetUnfolderBase]: 2238/3609 cut-off events. [2024-06-27 19:47:11,021 INFO L125 PetriNetUnfolderBase]: For 382683/382708 co-relation queries the response was YES. [2024-06-27 19:47:11,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30348 conditions, 3609 events. 2238/3609 cut-off events. For 382683/382708 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19994 event pairs, 543 based on Foata normal form. 27/3628 useless extension candidates. Maximal degree in co-relation 30261. Up to 3142 conditions per place. [2024-06-27 19:47:11,060 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 14 changer transitions 0/268 dead transitions. [2024-06-27 19:47:11,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 268 transitions, 2699 flow [2024-06-27 19:47:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:47:11,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:47:11,061 INFO L175 Difference]: Start difference. First operand has 188 places, 249 transitions, 2137 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:47:11,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 268 transitions, 2699 flow [2024-06-27 19:47:11,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 268 transitions, 2651 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:11,423 INFO L231 Difference]: Finished difference. Result has 190 places, 252 transitions, 2177 flow [2024-06-27 19:47:11,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2177, PETRI_PLACES=190, PETRI_TRANSITIONS=252} [2024-06-27 19:47:11,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-27 19:47:11,424 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 252 transitions, 2177 flow [2024-06-27 19:47:11,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:11,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:11,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:11,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:47:11,425 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:11,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash -183290526, now seen corresponding path program 2 times [2024-06-27 19:47:11,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:11,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236969781] [2024-06-27 19:47:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:11,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:12,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:12,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236969781] [2024-06-27 19:47:12,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236969781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:12,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:12,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:12,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093162143] [2024-06-27 19:47:12,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:12,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:12,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:12,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:12,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 252 transitions, 2177 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:12,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:12,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:12,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:13,050 INFO L124 PetriNetUnfolderBase]: 2244/3616 cut-off events. [2024-06-27 19:47:13,050 INFO L125 PetriNetUnfolderBase]: For 395217/395242 co-relation queries the response was YES. [2024-06-27 19:47:13,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30950 conditions, 3616 events. 2244/3616 cut-off events. For 395217/395242 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19993 event pairs, 538 based on Foata normal form. 27/3635 useless extension candidates. Maximal degree in co-relation 30862. Up to 3143 conditions per place. [2024-06-27 19:47:13,095 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 215 selfloop transitions, 19 changer transitions 0/269 dead transitions. [2024-06-27 19:47:13,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 269 transitions, 2741 flow [2024-06-27 19:47:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:47:13,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:47:13,096 INFO L175 Difference]: Start difference. First operand has 190 places, 252 transitions, 2177 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:47:13,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 269 transitions, 2741 flow [2024-06-27 19:47:13,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 269 transitions, 2675 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:13,648 INFO L231 Difference]: Finished difference. Result has 192 places, 255 transitions, 2215 flow [2024-06-27 19:47:13,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2215, PETRI_PLACES=192, PETRI_TRANSITIONS=255} [2024-06-27 19:47:13,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 19:47:13,649 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 255 transitions, 2215 flow [2024-06-27 19:47:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:13,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:13,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:13,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:47:13,650 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)] === [2024-06-27 19:47:13,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1572037645, now seen corresponding path program 1 times [2024-06-27 19:47:13,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:13,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103173902] [2024-06-27 19:47:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:13,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103173902] [2024-06-27 19:47:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103173902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:14,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:14,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849431021] [2024-06-27 19:47:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:14,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:14,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:14,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:14,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 255 transitions, 2215 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:14,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:14,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:14,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:15,412 INFO L124 PetriNetUnfolderBase]: 2254/3630 cut-off events. [2024-06-27 19:47:15,412 INFO L125 PetriNetUnfolderBase]: For 408443/408468 co-relation queries the response was YES. [2024-06-27 19:47:15,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31517 conditions, 3630 events. 2254/3630 cut-off events. For 408443/408468 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20051 event pairs, 536 based on Foata normal form. 27/3649 useless extension candidates. Maximal degree in co-relation 31428. Up to 3173 conditions per place. [2024-06-27 19:47:15,447 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 14 changer transitions 0/270 dead transitions. [2024-06-27 19:47:15,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 270 transitions, 2767 flow [2024-06-27 19:47:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:47:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:47:15,449 INFO L175 Difference]: Start difference. First operand has 192 places, 255 transitions, 2215 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:47:15,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 270 transitions, 2767 flow [2024-06-27 19:47:15,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 270 transitions, 2685 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:15,859 INFO L231 Difference]: Finished difference. Result has 194 places, 258 transitions, 2221 flow [2024-06-27 19:47:15,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2221, PETRI_PLACES=194, PETRI_TRANSITIONS=258} [2024-06-27 19:47:15,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-27 19:47:15,860 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 258 transitions, 2221 flow [2024-06-27 19:47:15,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:15,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:15,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:15,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:47:15,861 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)] === [2024-06-27 19:47:15,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash 23630041, now seen corresponding path program 2 times [2024-06-27 19:47:15,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:15,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030449084] [2024-06-27 19:47:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030449084] [2024-06-27 19:47:16,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030449084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:16,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:16,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:16,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498626969] [2024-06-27 19:47:16,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:16,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:16,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:16,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:17,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:17,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 258 transitions, 2221 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:17,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:17,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:17,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:17,664 INFO L124 PetriNetUnfolderBase]: 2268/3656 cut-off events. [2024-06-27 19:47:17,664 INFO L125 PetriNetUnfolderBase]: For 422206/422234 co-relation queries the response was YES. [2024-06-27 19:47:17,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32074 conditions, 3656 events. 2268/3656 cut-off events. For 422206/422234 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20273 event pairs, 545 based on Foata normal form. 30/3677 useless extension candidates. Maximal degree in co-relation 31984. Up to 3156 conditions per place. [2024-06-27 19:47:17,700 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 213 selfloop transitions, 28 changer transitions 0/276 dead transitions. [2024-06-27 19:47:17,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 276 transitions, 2965 flow [2024-06-27 19:47:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:47:17,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 19:47:17,701 INFO L175 Difference]: Start difference. First operand has 194 places, 258 transitions, 2221 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:47:17,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 276 transitions, 2965 flow [2024-06-27 19:47:18,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 276 transitions, 2899 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:18,158 INFO L231 Difference]: Finished difference. Result has 196 places, 264 transitions, 2332 flow [2024-06-27 19:47:18,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=196, PETRI_TRANSITIONS=264} [2024-06-27 19:47:18,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-27 19:47:18,158 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 264 transitions, 2332 flow [2024-06-27 19:47:18,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:18,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:18,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:18,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:47:18,159 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:18,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:18,159 INFO L85 PathProgramCache]: Analyzing trace with hash -841458076, now seen corresponding path program 3 times [2024-06-27 19:47:18,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:18,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881433292] [2024-06-27 19:47:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:18,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881433292] [2024-06-27 19:47:19,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881433292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:19,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:19,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:19,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451333624] [2024-06-27 19:47:19,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:19,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:19,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:19,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 264 transitions, 2332 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:19,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:19,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:19,766 INFO L124 PetriNetUnfolderBase]: 2270/3662 cut-off events. [2024-06-27 19:47:19,766 INFO L125 PetriNetUnfolderBase]: For 433297/433325 co-relation queries the response was YES. [2024-06-27 19:47:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32563 conditions, 3662 events. 2270/3662 cut-off events. For 433297/433325 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20383 event pairs, 552 based on Foata normal form. 29/3681 useless extension candidates. Maximal degree in co-relation 32472. Up to 3164 conditions per place. [2024-06-27 19:47:19,886 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 26 changer transitions 0/278 dead transitions. [2024-06-27 19:47:19,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 2914 flow [2024-06-27 19:47:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:47:19,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 19:47:19,887 INFO L175 Difference]: Start difference. First operand has 196 places, 264 transitions, 2332 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:47:19,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 2914 flow [2024-06-27 19:47:20,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 278 transitions, 2844 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:47:20,325 INFO L231 Difference]: Finished difference. Result has 200 places, 267 transitions, 2390 flow [2024-06-27 19:47:20,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2390, PETRI_PLACES=200, PETRI_TRANSITIONS=267} [2024-06-27 19:47:20,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-27 19:47:20,326 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 267 transitions, 2390 flow [2024-06-27 19:47:20,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:20,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:20,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:20,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:47:20,327 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:20,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash 23363131, now seen corresponding path program 3 times [2024-06-27 19:47:20,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:20,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782289886] [2024-06-27 19:47:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:20,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:21,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782289886] [2024-06-27 19:47:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782289886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:21,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:21,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417579553] [2024-06-27 19:47:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:21,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:47:21,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 267 transitions, 2390 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:21,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:21,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:47:21,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:22,034 INFO L124 PetriNetUnfolderBase]: 2265/3651 cut-off events. [2024-06-27 19:47:22,034 INFO L125 PetriNetUnfolderBase]: For 443854/443882 co-relation queries the response was YES. [2024-06-27 19:47:22,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32838 conditions, 3651 events. 2265/3651 cut-off events. For 443854/443882 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20307 event pairs, 542 based on Foata normal form. 30/3672 useless extension candidates. Maximal degree in co-relation 32745. Up to 3181 conditions per place. [2024-06-27 19:47:22,079 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 226 selfloop transitions, 19 changer transitions 0/280 dead transitions. [2024-06-27 19:47:22,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 280 transitions, 2960 flow [2024-06-27 19:47:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:47:22,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:47:22,081 INFO L175 Difference]: Start difference. First operand has 200 places, 267 transitions, 2390 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:47:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 280 transitions, 2960 flow [2024-06-27 19:47:22,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 2854 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:22,630 INFO L231 Difference]: Finished difference. Result has 202 places, 270 transitions, 2386 flow [2024-06-27 19:47:22,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=202, PETRI_TRANSITIONS=270} [2024-06-27 19:47:22,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-27 19:47:22,630 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 270 transitions, 2386 flow [2024-06-27 19:47:22,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:22,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:22,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:47:22,631 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:22,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash 123095957, now seen corresponding path program 1 times [2024-06-27 19:47:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172179714] [2024-06-27 19:47:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:22,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:23,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:23,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172179714] [2024-06-27 19:47:23,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172179714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:23,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:23,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:23,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812566444] [2024-06-27 19:47:23,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:23,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:23,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:23,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 270 transitions, 2386 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:23,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:23,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:23,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:25,069 INFO L124 PetriNetUnfolderBase]: 2701/4214 cut-off events. [2024-06-27 19:47:25,069 INFO L125 PetriNetUnfolderBase]: For 516785/516789 co-relation queries the response was YES. [2024-06-27 19:47:25,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37987 conditions, 4214 events. 2701/4214 cut-off events. For 516785/516789 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22828 event pairs, 487 based on Foata normal form. 20/4233 useless extension candidates. Maximal degree in co-relation 37893. Up to 3581 conditions per place. [2024-06-27 19:47:25,113 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 289 selfloop transitions, 34 changer transitions 0/328 dead transitions. [2024-06-27 19:47:25,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 328 transitions, 3558 flow [2024-06-27 19:47:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:47:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:47:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 19:47:25,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-27 19:47:25,115 INFO L175 Difference]: Start difference. First operand has 202 places, 270 transitions, 2386 flow. Second operand 11 states and 219 transitions. [2024-06-27 19:47:25,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 328 transitions, 3558 flow [2024-06-27 19:47:25,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 328 transitions, 3488 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:25,560 INFO L231 Difference]: Finished difference. Result has 208 places, 272 transitions, 2484 flow [2024-06-27 19:47:25,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2484, PETRI_PLACES=208, PETRI_TRANSITIONS=272} [2024-06-27 19:47:25,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 19:47:25,561 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 272 transitions, 2484 flow [2024-06-27 19:47:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:25,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:25,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:25,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:47:25,561 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:25,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:25,562 INFO L85 PathProgramCache]: Analyzing trace with hash 899538453, now seen corresponding path program 2 times [2024-06-27 19:47:25,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:25,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038257356] [2024-06-27 19:47:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038257356] [2024-06-27 19:47:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038257356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799681697] [2024-06-27 19:47:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:26,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:26,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 272 transitions, 2484 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:26,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:26,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:26,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:27,856 INFO L124 PetriNetUnfolderBase]: 2751/4306 cut-off events. [2024-06-27 19:47:27,857 INFO L125 PetriNetUnfolderBase]: For 532727/532731 co-relation queries the response was YES. [2024-06-27 19:47:27,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38697 conditions, 4306 events. 2751/4306 cut-off events. For 532727/532731 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23528 event pairs, 654 based on Foata normal form. 24/4329 useless extension candidates. Maximal degree in co-relation 38602. Up to 3886 conditions per place. [2024-06-27 19:47:27,901 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 29 changer transitions 0/318 dead transitions. [2024-06-27 19:47:27,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 318 transitions, 3332 flow [2024-06-27 19:47:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:47:27,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:47:27,903 INFO L175 Difference]: Start difference. First operand has 208 places, 272 transitions, 2484 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:47:27,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 318 transitions, 3332 flow [2024-06-27 19:47:28,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 318 transitions, 3247 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:28,408 INFO L231 Difference]: Finished difference. Result has 211 places, 273 transitions, 2514 flow [2024-06-27 19:47:28,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2514, PETRI_PLACES=211, PETRI_TRANSITIONS=273} [2024-06-27 19:47:28,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-27 19:47:28,409 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 273 transitions, 2514 flow [2024-06-27 19:47:28,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:28,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:28,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:28,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:47:28,409 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)] === [2024-06-27 19:47:28,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 986226543, now seen corresponding path program 3 times [2024-06-27 19:47:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197181576] [2024-06-27 19:47:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:29,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197181576] [2024-06-27 19:47:29,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197181576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:29,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:29,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:29,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931986057] [2024-06-27 19:47:29,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:29,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:29,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:29,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 273 transitions, 2514 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:29,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:29,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:29,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:30,903 INFO L124 PetriNetUnfolderBase]: 2723/4262 cut-off events. [2024-06-27 19:47:30,903 INFO L125 PetriNetUnfolderBase]: For 516946/516950 co-relation queries the response was YES. [2024-06-27 19:47:30,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37488 conditions, 4262 events. 2723/4262 cut-off events. For 516946/516950 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 23232 event pairs, 614 based on Foata normal form. 20/4281 useless extension candidates. Maximal degree in co-relation 37391. Up to 3732 conditions per place. [2024-06-27 19:47:30,950 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 286 selfloop transitions, 31 changer transitions 0/322 dead transitions. [2024-06-27 19:47:30,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 322 transitions, 3348 flow [2024-06-27 19:47:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 19:47:30,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 19:47:30,952 INFO L175 Difference]: Start difference. First operand has 211 places, 273 transitions, 2514 flow. Second operand 10 states and 199 transitions. [2024-06-27 19:47:30,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 322 transitions, 3348 flow [2024-06-27 19:47:31,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 322 transitions, 3253 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:31,415 INFO L231 Difference]: Finished difference. Result has 213 places, 273 transitions, 2487 flow [2024-06-27 19:47:31,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2487, PETRI_PLACES=213, PETRI_TRANSITIONS=273} [2024-06-27 19:47:31,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-27 19:47:31,415 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 273 transitions, 2487 flow [2024-06-27 19:47:31,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:31,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:31,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:31,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:47:31,416 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:31,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash 270795767, now seen corresponding path program 4 times [2024-06-27 19:47:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:31,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659934048] [2024-06-27 19:47:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:31,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:32,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:32,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659934048] [2024-06-27 19:47:32,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659934048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:32,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:32,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:32,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993730811] [2024-06-27 19:47:32,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:32,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:32,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:32,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:32,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 273 transitions, 2487 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:32,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:32,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:32,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:33,792 INFO L124 PetriNetUnfolderBase]: 2798/4396 cut-off events. [2024-06-27 19:47:33,793 INFO L125 PetriNetUnfolderBase]: For 538808/538815 co-relation queries the response was YES. [2024-06-27 19:47:33,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38328 conditions, 4396 events. 2798/4396 cut-off events. For 538808/538815 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24353 event pairs, 600 based on Foata normal form. 24/4416 useless extension candidates. Maximal degree in co-relation 38230. Up to 3382 conditions per place. [2024-06-27 19:47:33,840 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 116 changer transitions 0/319 dead transitions. [2024-06-27 19:47:33,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 319 transitions, 3339 flow [2024-06-27 19:47:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:47:33,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:47:33,841 INFO L175 Difference]: Start difference. First operand has 213 places, 273 transitions, 2487 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:47:33,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 319 transitions, 3339 flow [2024-06-27 19:47:34,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 319 transitions, 3258 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:34,464 INFO L231 Difference]: Finished difference. Result has 214 places, 274 transitions, 2695 flow [2024-06-27 19:47:34,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2695, PETRI_PLACES=214, PETRI_TRANSITIONS=274} [2024-06-27 19:47:34,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-27 19:47:34,465 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 274 transitions, 2695 flow [2024-06-27 19:47:34,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:34,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:34,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:34,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:47:34,466 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)] === [2024-06-27 19:47:34,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash 265433387, now seen corresponding path program 5 times [2024-06-27 19:47:34,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:34,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999296087] [2024-06-27 19:47:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:35,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:35,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999296087] [2024-06-27 19:47:35,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999296087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:35,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:35,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:35,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711870873] [2024-06-27 19:47:35,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:35,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:35,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:35,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:35,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:35,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 274 transitions, 2695 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:35,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:36,968 INFO L124 PetriNetUnfolderBase]: 2873/4531 cut-off events. [2024-06-27 19:47:36,968 INFO L125 PetriNetUnfolderBase]: For 560754/560761 co-relation queries the response was YES. [2024-06-27 19:47:36,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39794 conditions, 4531 events. 2873/4531 cut-off events. For 560754/560761 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25446 event pairs, 624 based on Foata normal form. 24/4551 useless extension candidates. Maximal degree in co-relation 39695. Up to 3507 conditions per place. [2024-06-27 19:47:37,016 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 201 selfloop transitions, 115 changer transitions 0/321 dead transitions. [2024-06-27 19:47:37,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 3557 flow [2024-06-27 19:47:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 19:47:37,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-27 19:47:37,017 INFO L175 Difference]: Start difference. First operand has 214 places, 274 transitions, 2695 flow. Second operand 10 states and 207 transitions. [2024-06-27 19:47:37,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 3557 flow [2024-06-27 19:47:37,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 321 transitions, 3298 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:37,744 INFO L231 Difference]: Finished difference. Result has 216 places, 275 transitions, 2725 flow [2024-06-27 19:47:37,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2725, PETRI_PLACES=216, PETRI_TRANSITIONS=275} [2024-06-27 19:47:37,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 19:47:37,744 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 275 transitions, 2725 flow [2024-06-27 19:47:37,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:37,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:37,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:37,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:47:37,745 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:37,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2117050391, now seen corresponding path program 6 times [2024-06-27 19:47:37,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:37,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460230014] [2024-06-27 19:47:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:37,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460230014] [2024-06-27 19:47:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460230014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:38,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:38,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:38,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623369949] [2024-06-27 19:47:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:38,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:38,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 275 transitions, 2725 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:38,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:38,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:38,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:40,229 INFO L124 PetriNetUnfolderBase]: 2931/4629 cut-off events. [2024-06-27 19:47:40,229 INFO L125 PetriNetUnfolderBase]: For 570711/570718 co-relation queries the response was YES. [2024-06-27 19:47:40,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40499 conditions, 4629 events. 2931/4629 cut-off events. For 570711/570718 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26195 event pairs, 610 based on Foata normal form. 20/4645 useless extension candidates. Maximal degree in co-relation 40399. Up to 3375 conditions per place. [2024-06-27 19:47:40,275 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 118 changer transitions 0/325 dead transitions. [2024-06-27 19:47:40,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 325 transitions, 3619 flow [2024-06-27 19:47:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 19:47:40,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-27 19:47:40,276 INFO L175 Difference]: Start difference. First operand has 216 places, 275 transitions, 2725 flow. Second operand 10 states and 209 transitions. [2024-06-27 19:47:40,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 325 transitions, 3619 flow [2024-06-27 19:47:40,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 325 transitions, 3360 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:40,875 INFO L231 Difference]: Finished difference. Result has 218 places, 276 transitions, 2762 flow [2024-06-27 19:47:40,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2762, PETRI_PLACES=218, PETRI_TRANSITIONS=276} [2024-06-27 19:47:40,875 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 19:47:40,875 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 276 transitions, 2762 flow [2024-06-27 19:47:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:40,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:40,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:47:40,876 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:40,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 803936658, now seen corresponding path program 1 times [2024-06-27 19:47:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:40,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015084508] [2024-06-27 19:47:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:42,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:42,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015084508] [2024-06-27 19:47:42,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015084508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:42,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:42,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218338189] [2024-06-27 19:47:42,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:42,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:42,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 276 transitions, 2762 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:42,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:42,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:42,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:43,472 INFO L124 PetriNetUnfolderBase]: 2948/4651 cut-off events. [2024-06-27 19:47:43,472 INFO L125 PetriNetUnfolderBase]: For 564316/564323 co-relation queries the response was YES. [2024-06-27 19:47:43,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40699 conditions, 4651 events. 2948/4651 cut-off events. For 564316/564323 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 26268 event pairs, 654 based on Foata normal form. 8/4655 useless extension candidates. Maximal degree in co-relation 40598. Up to 4031 conditions per place. [2024-06-27 19:47:43,516 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 220 selfloop transitions, 94 changer transitions 0/319 dead transitions. [2024-06-27 19:47:43,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 319 transitions, 3591 flow [2024-06-27 19:47:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 19:47:43,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 19:47:43,523 INFO L175 Difference]: Start difference. First operand has 218 places, 276 transitions, 2762 flow. Second operand 10 states and 197 transitions. [2024-06-27 19:47:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 319 transitions, 3591 flow [2024-06-27 19:47:44,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 319 transitions, 3313 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:44,096 INFO L231 Difference]: Finished difference. Result has 221 places, 281 transitions, 2772 flow [2024-06-27 19:47:44,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2772, PETRI_PLACES=221, PETRI_TRANSITIONS=281} [2024-06-27 19:47:44,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 19:47:44,096 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 281 transitions, 2772 flow [2024-06-27 19:47:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:44,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:44,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:44,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:47:44,097 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:44,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1338067327, now seen corresponding path program 7 times [2024-06-27 19:47:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:44,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433461296] [2024-06-27 19:47:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:45,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433461296] [2024-06-27 19:47:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433461296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:45,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:45,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:45,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299359232] [2024-06-27 19:47:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:45,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:45,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:45,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 281 transitions, 2772 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:45,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:45,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:45,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:46,759 INFO L124 PetriNetUnfolderBase]: 3023/4796 cut-off events. [2024-06-27 19:47:46,760 INFO L125 PetriNetUnfolderBase]: For 610880/610883 co-relation queries the response was YES. [2024-06-27 19:47:46,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41911 conditions, 4796 events. 3023/4796 cut-off events. For 610880/610883 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 27488 event pairs, 645 based on Foata normal form. 20/4812 useless extension candidates. Maximal degree in co-relation 41808. Up to 3757 conditions per place. [2024-06-27 19:47:46,804 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 214 selfloop transitions, 108 changer transitions 0/327 dead transitions. [2024-06-27 19:47:46,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 3662 flow [2024-06-27 19:47:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:47:46,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:47:46,805 INFO L175 Difference]: Start difference. First operand has 221 places, 281 transitions, 2772 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:47:46,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 3662 flow [2024-06-27 19:47:47,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 327 transitions, 3421 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:47,437 INFO L231 Difference]: Finished difference. Result has 224 places, 282 transitions, 2812 flow [2024-06-27 19:47:47,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2812, PETRI_PLACES=224, PETRI_TRANSITIONS=282} [2024-06-27 19:47:47,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-27 19:47:47,438 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 282 transitions, 2812 flow [2024-06-27 19:47:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:47,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:47,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:47:47,438 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:47,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1338071047, now seen corresponding path program 8 times [2024-06-27 19:47:47,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:47,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622075632] [2024-06-27 19:47:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622075632] [2024-06-27 19:47:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622075632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:48,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:48,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610216961] [2024-06-27 19:47:48,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:48,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:48,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:48,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:48,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 282 transitions, 2812 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:48,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:48,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:48,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:50,081 INFO L124 PetriNetUnfolderBase]: 3192/5070 cut-off events. [2024-06-27 19:47:50,081 INFO L125 PetriNetUnfolderBase]: For 675385/675388 co-relation queries the response was YES. [2024-06-27 19:47:50,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45665 conditions, 5070 events. 3192/5070 cut-off events. For 675385/675388 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29444 event pairs, 659 based on Foata normal form. 16/5082 useless extension candidates. Maximal degree in co-relation 45561. Up to 3745 conditions per place. [2024-06-27 19:47:50,138 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 111 changer transitions 0/334 dead transitions. [2024-06-27 19:47:50,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 334 transitions, 4050 flow [2024-06-27 19:47:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 19:47:50,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-27 19:47:50,140 INFO L175 Difference]: Start difference. First operand has 224 places, 282 transitions, 2812 flow. Second operand 10 states and 209 transitions. [2024-06-27 19:47:50,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 334 transitions, 4050 flow [2024-06-27 19:47:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 334 transitions, 3799 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:51,153 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 2907 flow [2024-06-27 19:47:51,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2907, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-27 19:47:51,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 19:47:51,154 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 2907 flow [2024-06-27 19:47:51,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:51,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:51,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:51,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:47:51,154 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1911674351, now seen corresponding path program 9 times [2024-06-27 19:47:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:51,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29849343] [2024-06-27 19:47:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29849343] [2024-06-27 19:47:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29849343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:52,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:52,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931368895] [2024-06-27 19:47:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:52,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:52,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:52,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 2907 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:52,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:52,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:52,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:53,709 INFO L124 PetriNetUnfolderBase]: 3267/5195 cut-off events. [2024-06-27 19:47:53,709 INFO L125 PetriNetUnfolderBase]: For 704857/704860 co-relation queries the response was YES. [2024-06-27 19:47:53,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46696 conditions, 5195 events. 3267/5195 cut-off events. For 704857/704860 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 30446 event pairs, 694 based on Foata normal form. 20/5211 useless extension candidates. Maximal degree in co-relation 46591. Up to 4161 conditions per place. [2024-06-27 19:47:53,767 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 112 changer transitions 0/328 dead transitions. [2024-06-27 19:47:53,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 328 transitions, 3791 flow [2024-06-27 19:47:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 19:47:53,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-27 19:47:53,768 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 2907 flow. Second operand 10 states and 203 transitions. [2024-06-27 19:47:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 328 transitions, 3791 flow [2024-06-27 19:47:54,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 328 transitions, 3601 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:54,571 INFO L231 Difference]: Finished difference. Result has 230 places, 285 transitions, 3010 flow [2024-06-27 19:47:54,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3010, PETRI_PLACES=230, PETRI_TRANSITIONS=285} [2024-06-27 19:47:54,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 19:47:54,571 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 285 transitions, 3010 flow [2024-06-27 19:47:54,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:54,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:54,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:54,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:47:54,572 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)] === [2024-06-27 19:47:54,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1332560797, now seen corresponding path program 10 times [2024-06-27 19:47:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053494530] [2024-06-27 19:47:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053494530] [2024-06-27 19:47:55,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053494530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:55,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:55,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108982981] [2024-06-27 19:47:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:55,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:55,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 285 transitions, 3010 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:55,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:55,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:55,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:57,097 INFO L124 PetriNetUnfolderBase]: 3231/5139 cut-off events. [2024-06-27 19:47:57,097 INFO L125 PetriNetUnfolderBase]: For 671299/671302 co-relation queries the response was YES. [2024-06-27 19:47:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45069 conditions, 5139 events. 3231/5139 cut-off events. For 671299/671302 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30106 event pairs, 671 based on Foata normal form. 20/5155 useless extension candidates. Maximal degree in co-relation 44962. Up to 4105 conditions per place. [2024-06-27 19:47:57,156 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 107 changer transitions 0/330 dead transitions. [2024-06-27 19:47:57,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 330 transitions, 3850 flow [2024-06-27 19:47:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 19:47:57,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 19:47:57,157 INFO L175 Difference]: Start difference. First operand has 230 places, 285 transitions, 3010 flow. Second operand 10 states and 206 transitions. [2024-06-27 19:47:57,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 330 transitions, 3850 flow [2024-06-27 19:47:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 330 transitions, 3573 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:58,209 INFO L231 Difference]: Finished difference. Result has 232 places, 285 transitions, 2954 flow [2024-06-27 19:47:58,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2954, PETRI_PLACES=232, PETRI_TRANSITIONS=285} [2024-06-27 19:47:58,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-27 19:47:58,209 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 285 transitions, 2954 flow [2024-06-27 19:47:58,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:58,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:58,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:58,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:47:58,210 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:58,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash 783298932, now seen corresponding path program 1 times [2024-06-27 19:47:58,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:58,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525575302] [2024-06-27 19:47:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:58,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:59,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525575302] [2024-06-27 19:47:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525575302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:59,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:59,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:59,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155132303] [2024-06-27 19:47:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:59,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:47:59,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 285 transitions, 2954 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:59,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:59,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:47:59,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:00,086 INFO L124 PetriNetUnfolderBase]: 3236/5156 cut-off events. [2024-06-27 19:48:00,086 INFO L125 PetriNetUnfolderBase]: For 640358/640365 co-relation queries the response was YES. [2024-06-27 19:48:00,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44840 conditions, 5156 events. 3236/5156 cut-off events. For 640358/640365 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30315 event pairs, 723 based on Foata normal form. 7/5161 useless extension candidates. Maximal degree in co-relation 44732. Up to 4859 conditions per place. [2024-06-27 19:48:00,145 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 274 selfloop transitions, 28 changer transitions 0/307 dead transitions. [2024-06-27 19:48:00,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 307 transitions, 3694 flow [2024-06-27 19:48:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:48:00,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 19:48:00,146 INFO L175 Difference]: Start difference. First operand has 232 places, 285 transitions, 2954 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:48:00,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 307 transitions, 3694 flow [2024-06-27 19:48:01,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 307 transitions, 3465 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:48:01,083 INFO L231 Difference]: Finished difference. Result has 230 places, 288 transitions, 2868 flow [2024-06-27 19:48:01,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2868, PETRI_PLACES=230, PETRI_TRANSITIONS=288} [2024-06-27 19:48:01,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 19:48:01,084 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 288 transitions, 2868 flow [2024-06-27 19:48:01,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:01,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:01,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:48:01,084 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:01,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 789965172, now seen corresponding path program 2 times [2024-06-27 19:48:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261077981] [2024-06-27 19:48:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:01,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261077981] [2024-06-27 19:48:01,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261077981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:01,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:01,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852430102] [2024-06-27 19:48:01,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:01,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:01,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:01,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 288 transitions, 2868 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:01,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:01,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:01,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:03,008 INFO L124 PetriNetUnfolderBase]: 3249/5165 cut-off events. [2024-06-27 19:48:03,008 INFO L125 PetriNetUnfolderBase]: For 658280/658287 co-relation queries the response was YES. [2024-06-27 19:48:03,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45157 conditions, 5165 events. 3249/5165 cut-off events. For 658280/658287 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30291 event pairs, 741 based on Foata normal form. 7/5170 useless extension candidates. Maximal degree in co-relation 45048. Up to 4863 conditions per place. [2024-06-27 19:48:03,061 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 269 selfloop transitions, 36 changer transitions 0/310 dead transitions. [2024-06-27 19:48:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 310 transitions, 3836 flow [2024-06-27 19:48:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:48:03,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 19:48:03,062 INFO L175 Difference]: Start difference. First operand has 230 places, 288 transitions, 2868 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:48:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 310 transitions, 3836 flow [2024-06-27 19:48:03,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 310 transitions, 3717 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:03,741 INFO L231 Difference]: Finished difference. Result has 232 places, 294 transitions, 2993 flow [2024-06-27 19:48:03,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2749, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2993, PETRI_PLACES=232, PETRI_TRANSITIONS=294} [2024-06-27 19:48:03,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-27 19:48:03,742 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 294 transitions, 2993 flow [2024-06-27 19:48:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:03,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:03,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:03,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:48:03,742 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)] === [2024-06-27 19:48:03,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:03,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1312205826, now seen corresponding path program 2 times [2024-06-27 19:48:03,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:03,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072777400] [2024-06-27 19:48:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072777400] [2024-06-27 19:48:04,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072777400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:04,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:04,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:04,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880204688] [2024-06-27 19:48:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:04,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:04,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:04,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:04,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 294 transitions, 2993 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:04,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:04,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:04,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:06,447 INFO L124 PetriNetUnfolderBase]: 3277/5222 cut-off events. [2024-06-27 19:48:06,447 INFO L125 PetriNetUnfolderBase]: For 685224/685227 co-relation queries the response was YES. [2024-06-27 19:48:06,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45914 conditions, 5222 events. 3277/5222 cut-off events. For 685224/685227 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30747 event pairs, 713 based on Foata normal form. 4/5222 useless extension candidates. Maximal degree in co-relation 45804. Up to 4568 conditions per place. [2024-06-27 19:48:06,500 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 96 changer transitions 0/339 dead transitions. [2024-06-27 19:48:06,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 339 transitions, 3894 flow [2024-06-27 19:48:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:48:06,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:48:06,502 INFO L175 Difference]: Start difference. First operand has 232 places, 294 transitions, 2993 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:48:06,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 339 transitions, 3894 flow [2024-06-27 19:48:07,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 339 transitions, 3777 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 19:48:07,387 INFO L231 Difference]: Finished difference. Result has 240 places, 304 transitions, 3222 flow [2024-06-27 19:48:07,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3222, PETRI_PLACES=240, PETRI_TRANSITIONS=304} [2024-06-27 19:48:07,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 19:48:07,388 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 304 transitions, 3222 flow [2024-06-27 19:48:07,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:07,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:07,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:07,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:48:07,389 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1312215126, now seen corresponding path program 3 times [2024-06-27 19:48:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531254491] [2024-06-27 19:48:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:08,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:08,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531254491] [2024-06-27 19:48:08,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531254491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:08,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:08,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125809119] [2024-06-27 19:48:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:08,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:08,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:08,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 304 transitions, 3222 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:08,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:08,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:08,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:09,977 INFO L124 PetriNetUnfolderBase]: 3319/5283 cut-off events. [2024-06-27 19:48:09,977 INFO L125 PetriNetUnfolderBase]: For 718318/718321 co-relation queries the response was YES. [2024-06-27 19:48:10,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47739 conditions, 5283 events. 3319/5283 cut-off events. For 718318/718321 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31155 event pairs, 711 based on Foata normal form. 4/5283 useless extension candidates. Maximal degree in co-relation 47626. Up to 4546 conditions per place. [2024-06-27 19:48:10,041 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 103 changer transitions 0/346 dead transitions. [2024-06-27 19:48:10,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 346 transitions, 4434 flow [2024-06-27 19:48:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:48:10,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 19:48:10,043 INFO L175 Difference]: Start difference. First operand has 240 places, 304 transitions, 3222 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:48:10,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 346 transitions, 4434 flow [2024-06-27 19:48:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 346 transitions, 4214 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:10,881 INFO L231 Difference]: Finished difference. Result has 245 places, 308 transitions, 3365 flow [2024-06-27 19:48:10,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3365, PETRI_PLACES=245, PETRI_TRANSITIONS=308} [2024-06-27 19:48:10,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-27 19:48:10,882 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 308 transitions, 3365 flow [2024-06-27 19:48:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:10,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:10,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:10,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:48:10,882 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:10,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash 92541072, now seen corresponding path program 4 times [2024-06-27 19:48:10,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:10,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543831905] [2024-06-27 19:48:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:12,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543831905] [2024-06-27 19:48:12,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543831905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:12,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:12,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463296198] [2024-06-27 19:48:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:12,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:12,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 308 transitions, 3365 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:12,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:12,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:12,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:13,882 INFO L124 PetriNetUnfolderBase]: 3336/5325 cut-off events. [2024-06-27 19:48:13,882 INFO L125 PetriNetUnfolderBase]: For 735701/735704 co-relation queries the response was YES. [2024-06-27 19:48:13,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48086 conditions, 5325 events. 3336/5325 cut-off events. For 735701/735704 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31528 event pairs, 725 based on Foata normal form. 4/5325 useless extension candidates. Maximal degree in co-relation 47972. Up to 4661 conditions per place. [2024-06-27 19:48:13,946 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 95 changer transitions 0/346 dead transitions. [2024-06-27 19:48:13,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 346 transitions, 4244 flow [2024-06-27 19:48:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:48:13,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:48:13,948 INFO L175 Difference]: Start difference. First operand has 245 places, 308 transitions, 3365 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:48:13,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 346 transitions, 4244 flow [2024-06-27 19:48:14,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 346 transitions, 4018 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:14,760 INFO L231 Difference]: Finished difference. Result has 250 places, 311 transitions, 3437 flow [2024-06-27 19:48:14,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3437, PETRI_PLACES=250, PETRI_TRANSITIONS=311} [2024-06-27 19:48:14,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-27 19:48:14,761 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 311 transitions, 3437 flow [2024-06-27 19:48:14,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:14,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:14,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:14,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:48:14,762 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:14,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1662216542, now seen corresponding path program 5 times [2024-06-27 19:48:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:14,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490787414] [2024-06-27 19:48:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:14,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:15,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490787414] [2024-06-27 19:48:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490787414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:15,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268331879] [2024-06-27 19:48:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:15,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:15,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:16,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:16,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 311 transitions, 3437 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:16,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:16,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:16,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:17,539 INFO L124 PetriNetUnfolderBase]: 3328/5323 cut-off events. [2024-06-27 19:48:17,539 INFO L125 PetriNetUnfolderBase]: For 740645/740648 co-relation queries the response was YES. [2024-06-27 19:48:17,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48012 conditions, 5323 events. 3328/5323 cut-off events. For 740645/740648 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31646 event pairs, 733 based on Foata normal form. 4/5323 useless extension candidates. Maximal degree in co-relation 47895. Up to 4649 conditions per place. [2024-06-27 19:48:17,601 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 92 changer transitions 0/347 dead transitions. [2024-06-27 19:48:17,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 347 transitions, 4237 flow [2024-06-27 19:48:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 19:48:17,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 19:48:17,602 INFO L175 Difference]: Start difference. First operand has 250 places, 311 transitions, 3437 flow. Second operand 10 states and 197 transitions. [2024-06-27 19:48:17,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 347 transitions, 4237 flow [2024-06-27 19:48:18,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 347 transitions, 3968 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:18,503 INFO L231 Difference]: Finished difference. Result has 253 places, 311 transitions, 3359 flow [2024-06-27 19:48:18,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3359, PETRI_PLACES=253, PETRI_TRANSITIONS=311} [2024-06-27 19:48:18,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-27 19:48:18,503 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 311 transitions, 3359 flow [2024-06-27 19:48:18,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:18,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:18,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:18,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:48:18,504 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)] === [2024-06-27 19:48:18,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1446237111, now seen corresponding path program 1 times [2024-06-27 19:48:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612725137] [2024-06-27 19:48:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612725137] [2024-06-27 19:48:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612725137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:19,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:48:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548963797] [2024-06-27 19:48:19,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:48:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:48:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:48:19,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:48:19,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 311 transitions, 3359 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:19,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:19,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:48:19,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:20,530 INFO L124 PetriNetUnfolderBase]: 2999/4919 cut-off events. [2024-06-27 19:48:20,530 INFO L125 PetriNetUnfolderBase]: For 756246/756250 co-relation queries the response was YES. [2024-06-27 19:48:20,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45998 conditions, 4919 events. 2999/4919 cut-off events. For 756246/756250 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30245 event pairs, 671 based on Foata normal form. 6/4865 useless extension candidates. Maximal degree in co-relation 45880. Up to 4265 conditions per place. [2024-06-27 19:48:20,592 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 246 selfloop transitions, 25 changer transitions 0/337 dead transitions. [2024-06-27 19:48:20,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 337 transitions, 4029 flow [2024-06-27 19:48:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:48:20,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:48:20,593 INFO L175 Difference]: Start difference. First operand has 253 places, 311 transitions, 3359 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:48:20,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 337 transitions, 4029 flow [2024-06-27 19:48:21,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 337 transitions, 3783 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 19:48:21,666 INFO L231 Difference]: Finished difference. Result has 250 places, 314 transitions, 3227 flow [2024-06-27 19:48:21,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3227, PETRI_PLACES=250, PETRI_TRANSITIONS=314} [2024-06-27 19:48:21,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-27 19:48:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 314 transitions, 3227 flow [2024-06-27 19:48:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:21,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:21,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:21,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:48:21,668 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)] === [2024-06-27 19:48:21,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 255597341, now seen corresponding path program 2 times [2024-06-27 19:48:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950348036] [2024-06-27 19:48:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:21,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950348036] [2024-06-27 19:48:22,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950348036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:22,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:22,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:48:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677464358] [2024-06-27 19:48:22,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:22,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:48:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:48:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:48:22,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:48:22,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 314 transitions, 3227 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:22,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:22,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:48:22,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:23,857 INFO L124 PetriNetUnfolderBase]: 3020/4961 cut-off events. [2024-06-27 19:48:23,858 INFO L125 PetriNetUnfolderBase]: For 779529/779535 co-relation queries the response was YES. [2024-06-27 19:48:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46628 conditions, 4961 events. 3020/4961 cut-off events. For 779529/779535 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30598 event pairs, 686 based on Foata normal form. 6/4906 useless extension candidates. Maximal degree in co-relation 46511. Up to 4269 conditions per place. [2024-06-27 19:48:23,914 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 236 selfloop transitions, 36 changer transitions 0/338 dead transitions. [2024-06-27 19:48:23,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 338 transitions, 4105 flow [2024-06-27 19:48:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:48:23,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:48:23,915 INFO L175 Difference]: Start difference. First operand has 250 places, 314 transitions, 3227 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:48:23,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 338 transitions, 4105 flow [2024-06-27 19:48:25,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 338 transitions, 4013 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:25,109 INFO L231 Difference]: Finished difference. Result has 252 places, 320 transitions, 3335 flow [2024-06-27 19:48:25,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3135, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3335, PETRI_PLACES=252, PETRI_TRANSITIONS=320} [2024-06-27 19:48:25,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-27 19:48:25,109 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 320 transitions, 3335 flow [2024-06-27 19:48:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:25,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:25,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:48:25,110 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)] === [2024-06-27 19:48:25,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -750158092, now seen corresponding path program 1 times [2024-06-27 19:48:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008000008] [2024-06-27 19:48:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:26,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008000008] [2024-06-27 19:48:26,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008000008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:26,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:26,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:48:26,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875002857] [2024-06-27 19:48:26,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:48:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:48:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:48:26,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:48:26,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 320 transitions, 3335 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:26,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:26,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:48:26,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:27,226 INFO L124 PetriNetUnfolderBase]: 3027/4972 cut-off events. [2024-06-27 19:48:27,226 INFO L125 PetriNetUnfolderBase]: For 799941/799951 co-relation queries the response was YES. [2024-06-27 19:48:27,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47287 conditions, 4972 events. 3027/4972 cut-off events. For 799941/799951 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30666 event pairs, 687 based on Foata normal form. 6/4917 useless extension candidates. Maximal degree in co-relation 47169. Up to 4337 conditions per place. [2024-06-27 19:48:27,286 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 20 changer transitions 0/340 dead transitions. [2024-06-27 19:48:27,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 340 transitions, 3999 flow [2024-06-27 19:48:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:48:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:48:27,287 INFO L175 Difference]: Start difference. First operand has 252 places, 320 transitions, 3335 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:48:27,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 340 transitions, 3999 flow [2024-06-27 19:48:28,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 340 transitions, 3911 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:48:28,438 INFO L231 Difference]: Finished difference. Result has 256 places, 323 transitions, 3363 flow [2024-06-27 19:48:28,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3363, PETRI_PLACES=256, PETRI_TRANSITIONS=323} [2024-06-27 19:48:28,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-27 19:48:28,438 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 323 transitions, 3363 flow [2024-06-27 19:48:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:28,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:28,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:28,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:48:28,439 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)] === [2024-06-27 19:48:28,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -975362657, now seen corresponding path program 3 times [2024-06-27 19:48:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380778024] [2024-06-27 19:48:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:29,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:29,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380778024] [2024-06-27 19:48:29,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380778024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:29,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:29,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:48:29,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43421034] [2024-06-27 19:48:29,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:48:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:48:29,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:48:29,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:48:29,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 323 transitions, 3363 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:29,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:29,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:48:29,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:30,557 INFO L124 PetriNetUnfolderBase]: 3026/4968 cut-off events. [2024-06-27 19:48:30,557 INFO L125 PetriNetUnfolderBase]: For 809399/809405 co-relation queries the response was YES. [2024-06-27 19:48:30,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47606 conditions, 4968 events. 3026/4968 cut-off events. For 809399/809405 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30622 event pairs, 686 based on Foata normal form. 5/4913 useless extension candidates. Maximal degree in co-relation 47486. Up to 4292 conditions per place. [2024-06-27 19:48:30,621 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 246 selfloop transitions, 28 changer transitions 0/340 dead transitions. [2024-06-27 19:48:30,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 340 transitions, 3965 flow [2024-06-27 19:48:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:48:30,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:48:30,622 INFO L175 Difference]: Start difference. First operand has 256 places, 323 transitions, 3363 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:48:30,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 340 transitions, 3965 flow [2024-06-27 19:48:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 340 transitions, 3837 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:31,381 INFO L231 Difference]: Finished difference. Result has 258 places, 323 transitions, 3297 flow [2024-06-27 19:48:31,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=258, PETRI_TRANSITIONS=323} [2024-06-27 19:48:31,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-27 19:48:31,382 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 323 transitions, 3297 flow [2024-06-27 19:48:31,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:31,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:31,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:31,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:48:31,383 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:31,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1443157619, now seen corresponding path program 11 times [2024-06-27 19:48:31,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:31,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212491583] [2024-06-27 19:48:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:31,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:32,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212491583] [2024-06-27 19:48:32,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212491583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:32,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:32,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234244887] [2024-06-27 19:48:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:32,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:32,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:32,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:32,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 323 transitions, 3297 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:32,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:32,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:32,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:34,041 INFO L124 PetriNetUnfolderBase]: 3443/5478 cut-off events. [2024-06-27 19:48:34,041 INFO L125 PetriNetUnfolderBase]: For 877875/877875 co-relation queries the response was YES. [2024-06-27 19:48:34,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50956 conditions, 5478 events. 3443/5478 cut-off events. For 877875/877875 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32400 event pairs, 691 based on Foata normal form. 20/5491 useless extension candidates. Maximal degree in co-relation 50835. Up to 4426 conditions per place. [2024-06-27 19:48:34,109 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 251 selfloop transitions, 111 changer transitions 0/367 dead transitions. [2024-06-27 19:48:34,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 367 transitions, 4273 flow [2024-06-27 19:48:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 19:48:34,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 19:48:34,111 INFO L175 Difference]: Start difference. First operand has 258 places, 323 transitions, 3297 flow. Second operand 10 states and 202 transitions. [2024-06-27 19:48:34,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 367 transitions, 4273 flow [2024-06-27 19:48:35,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 367 transitions, 4195 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:35,364 INFO L231 Difference]: Finished difference. Result has 261 places, 324 transitions, 3514 flow [2024-06-27 19:48:35,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3514, PETRI_PLACES=261, PETRI_TRANSITIONS=324} [2024-06-27 19:48:35,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 19:48:35,364 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 324 transitions, 3514 flow [2024-06-27 19:48:35,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:35,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:35,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:48:35,365 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:35,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1264561191, now seen corresponding path program 12 times [2024-06-27 19:48:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127718451] [2024-06-27 19:48:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:36,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127718451] [2024-06-27 19:48:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127718451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:36,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:36,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864458830] [2024-06-27 19:48:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:36,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:36,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 324 transitions, 3514 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:36,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:36,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:36,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:38,086 INFO L124 PetriNetUnfolderBase]: 3518/5608 cut-off events. [2024-06-27 19:48:38,086 INFO L125 PetriNetUnfolderBase]: For 910209/910209 co-relation queries the response was YES. [2024-06-27 19:48:38,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52720 conditions, 5608 events. 3518/5608 cut-off events. For 910209/910209 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 33496 event pairs, 699 based on Foata normal form. 20/5621 useless extension candidates. Maximal degree in co-relation 52598. Up to 4551 conditions per place. [2024-06-27 19:48:38,154 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 249 selfloop transitions, 114 changer transitions 0/368 dead transitions. [2024-06-27 19:48:38,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 368 transitions, 4494 flow [2024-06-27 19:48:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 19:48:38,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 19:48:38,155 INFO L175 Difference]: Start difference. First operand has 261 places, 324 transitions, 3514 flow. Second operand 10 states and 201 transitions. [2024-06-27 19:48:38,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 368 transitions, 4494 flow [2024-06-27 19:48:39,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 368 transitions, 4229 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:39,342 INFO L231 Difference]: Finished difference. Result has 263 places, 325 transitions, 3552 flow [2024-06-27 19:48:39,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3552, PETRI_PLACES=263, PETRI_TRANSITIONS=325} [2024-06-27 19:48:39,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-27 19:48:39,343 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 325 transitions, 3552 flow [2024-06-27 19:48:39,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:39,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:39,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:39,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:48:39,343 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:39,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1269923571, now seen corresponding path program 13 times [2024-06-27 19:48:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:39,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549513725] [2024-06-27 19:48:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:40,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549513725] [2024-06-27 19:48:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549513725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:40,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:40,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332264961] [2024-06-27 19:48:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:40,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:40,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 325 transitions, 3552 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:40,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:40,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:40,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:42,049 INFO L124 PetriNetUnfolderBase]: 3593/5738 cut-off events. [2024-06-27 19:48:42,049 INFO L125 PetriNetUnfolderBase]: For 934097/934097 co-relation queries the response was YES. [2024-06-27 19:48:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53721 conditions, 5738 events. 3593/5738 cut-off events. For 934097/934097 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34512 event pairs, 713 based on Foata normal form. 20/5751 useless extension candidates. Maximal degree in co-relation 53598. Up to 4676 conditions per place. [2024-06-27 19:48:42,123 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 248 selfloop transitions, 116 changer transitions 0/369 dead transitions. [2024-06-27 19:48:42,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 369 transitions, 4536 flow [2024-06-27 19:48:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 19:48:42,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:48:42,124 INFO L175 Difference]: Start difference. First operand has 263 places, 325 transitions, 3552 flow. Second operand 10 states and 200 transitions. [2024-06-27 19:48:42,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 369 transitions, 4536 flow [2024-06-27 19:48:43,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 369 transitions, 4263 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:43,370 INFO L231 Difference]: Finished difference. Result has 265 places, 326 transitions, 3588 flow [2024-06-27 19:48:43,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3588, PETRI_PLACES=265, PETRI_TRANSITIONS=326} [2024-06-27 19:48:43,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-27 19:48:43,371 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 326 transitions, 3588 flow [2024-06-27 19:48:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:43,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:43,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:48:43,371 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:43,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1270071441, now seen corresponding path program 14 times [2024-06-27 19:48:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:43,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760200199] [2024-06-27 19:48:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:44,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:44,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760200199] [2024-06-27 19:48:44,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760200199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:44,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:44,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:44,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782439082] [2024-06-27 19:48:44,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:44,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:44,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 326 transitions, 3588 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:44,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:44,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:44,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:45,981 INFO L124 PetriNetUnfolderBase]: 3712/5934 cut-off events. [2024-06-27 19:48:45,982 INFO L125 PetriNetUnfolderBase]: For 985055/985055 co-relation queries the response was YES. [2024-06-27 19:48:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56297 conditions, 5934 events. 3712/5934 cut-off events. For 985055/985055 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35995 event pairs, 723 based on Foata normal form. 16/5943 useless extension candidates. Maximal degree in co-relation 56173. Up to 4361 conditions per place. [2024-06-27 19:48:46,056 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 121 changer transitions 0/376 dead transitions. [2024-06-27 19:48:46,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 376 transitions, 4984 flow [2024-06-27 19:48:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:48:46,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 19:48:46,057 INFO L175 Difference]: Start difference. First operand has 265 places, 326 transitions, 3588 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:48:46,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 376 transitions, 4984 flow [2024-06-27 19:48:47,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 376 transitions, 4705 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:47,310 INFO L231 Difference]: Finished difference. Result has 267 places, 328 transitions, 3699 flow [2024-06-27 19:48:47,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3699, PETRI_PLACES=267, PETRI_TRANSITIONS=328} [2024-06-27 19:48:47,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-27 19:48:47,311 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 328 transitions, 3699 flow [2024-06-27 19:48:47,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:47,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:47,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:47,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:48:47,312 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:47,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash 613232457, now seen corresponding path program 15 times [2024-06-27 19:48:47,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:47,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714009330] [2024-06-27 19:48:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:47,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:48,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714009330] [2024-06-27 19:48:48,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714009330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:48,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:48,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287023053] [2024-06-27 19:48:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:48,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:48,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:48,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:48,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:48,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 328 transitions, 3699 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:48,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:48,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:48,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:49,967 INFO L124 PetriNetUnfolderBase]: 3676/5883 cut-off events. [2024-06-27 19:48:49,967 INFO L125 PetriNetUnfolderBase]: For 950911/950911 co-relation queries the response was YES. [2024-06-27 19:48:50,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54132 conditions, 5883 events. 3676/5883 cut-off events. For 950911/950911 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35685 event pairs, 732 based on Foata normal form. 20/5896 useless extension candidates. Maximal degree in co-relation 54007. Up to 4821 conditions per place. [2024-06-27 19:48:50,042 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 123 changer transitions 0/368 dead transitions. [2024-06-27 19:48:50,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 368 transitions, 4595 flow [2024-06-27 19:48:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:48:50,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 19:48:50,043 INFO L175 Difference]: Start difference. First operand has 267 places, 328 transitions, 3699 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:48:50,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 368 transitions, 4595 flow [2024-06-27 19:48:51,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 368 transitions, 4357 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:51,462 INFO L231 Difference]: Finished difference. Result has 271 places, 328 transitions, 3714 flow [2024-06-27 19:48:51,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3714, PETRI_PLACES=271, PETRI_TRANSITIONS=328} [2024-06-27 19:48:51,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-27 19:48:51,463 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 328 transitions, 3714 flow [2024-06-27 19:48:51,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:51,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:51,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:48:51,463 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:51,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1400379020, now seen corresponding path program 3 times [2024-06-27 19:48:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280916066] [2024-06-27 19:48:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:52,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:52,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280916066] [2024-06-27 19:48:52,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280916066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:52,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:52,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:52,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448991304] [2024-06-27 19:48:52,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:52,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:52,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:52,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:52,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:52,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 328 transitions, 3714 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:52,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:52,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:52,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:53,471 INFO L124 PetriNetUnfolderBase]: 3673/5886 cut-off events. [2024-06-27 19:48:53,471 INFO L125 PetriNetUnfolderBase]: For 892923/892932 co-relation queries the response was YES. [2024-06-27 19:48:53,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53769 conditions, 5886 events. 3673/5886 cut-off events. For 892923/892932 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35810 event pairs, 797 based on Foata normal form. 7/5890 useless extension candidates. Maximal degree in co-relation 53642. Up to 5573 conditions per place. [2024-06-27 19:48:53,543 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 312 selfloop transitions, 28 changer transitions 0/345 dead transitions. [2024-06-27 19:48:53,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 345 transitions, 4452 flow [2024-06-27 19:48:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 19:48:53,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:48:53,545 INFO L175 Difference]: Start difference. First operand has 271 places, 328 transitions, 3714 flow. Second operand 7 states and 129 transitions. [2024-06-27 19:48:53,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 345 transitions, 4452 flow [2024-06-27 19:48:54,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 345 transitions, 4140 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 19:48:54,594 INFO L231 Difference]: Finished difference. Result has 269 places, 328 transitions, 3465 flow [2024-06-27 19:48:54,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3465, PETRI_PLACES=269, PETRI_TRANSITIONS=328} [2024-06-27 19:48:54,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-27 19:48:54,595 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 328 transitions, 3465 flow [2024-06-27 19:48:54,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:54,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:54,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:54,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:48:54,596 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:54,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1387046540, now seen corresponding path program 4 times [2024-06-27 19:48:54,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:54,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554669297] [2024-06-27 19:48:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:54,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:55,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554669297] [2024-06-27 19:48:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554669297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:55,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122948049] [2024-06-27 19:48:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:55,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:55,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 328 transitions, 3465 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:55,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:55,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:55,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:56,703 INFO L124 PetriNetUnfolderBase]: 3678/5907 cut-off events. [2024-06-27 19:48:56,704 INFO L125 PetriNetUnfolderBase]: For 909623/909632 co-relation queries the response was YES. [2024-06-27 19:48:56,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53475 conditions, 5907 events. 3678/5907 cut-off events. For 909623/909632 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36133 event pairs, 812 based on Foata normal form. 7/5911 useless extension candidates. Maximal degree in co-relation 53347. Up to 5569 conditions per place. [2024-06-27 19:48:56,779 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 304 selfloop transitions, 36 changer transitions 0/345 dead transitions. [2024-06-27 19:48:56,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 345 transitions, 4279 flow [2024-06-27 19:48:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 19:48:56,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 19:48:56,780 INFO L175 Difference]: Start difference. First operand has 269 places, 328 transitions, 3465 flow. Second operand 7 states and 127 transitions. [2024-06-27 19:48:56,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 345 transitions, 4279 flow [2024-06-27 19:48:57,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 345 transitions, 4201 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:57,944 INFO L231 Difference]: Finished difference. Result has 270 places, 331 transitions, 3559 flow [2024-06-27 19:48:57,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3559, PETRI_PLACES=270, PETRI_TRANSITIONS=331} [2024-06-27 19:48:57,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 19:48:57,945 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 331 transitions, 3559 flow [2024-06-27 19:48:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:57,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:57,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:57,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:48:57,945 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:57,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1249433690, now seen corresponding path program 6 times [2024-06-27 19:48:57,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926392083] [2024-06-27 19:48:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:57,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926392083] [2024-06-27 19:48:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926392083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:59,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:59,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949421856] [2024-06-27 19:48:59,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:59,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:48:59,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 331 transitions, 3559 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:59,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:59,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:48:59,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:00,712 INFO L124 PetriNetUnfolderBase]: 3695/5945 cut-off events. [2024-06-27 19:49:00,713 INFO L125 PetriNetUnfolderBase]: For 939701/939704 co-relation queries the response was YES. [2024-06-27 19:49:00,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54236 conditions, 5945 events. 3695/5945 cut-off events. For 939701/939704 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36482 event pairs, 797 based on Foata normal form. 6/5945 useless extension candidates. Maximal degree in co-relation 54107. Up to 5255 conditions per place. [2024-06-27 19:49:00,793 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 269 selfloop transitions, 97 changer transitions 0/371 dead transitions. [2024-06-27 19:49:00,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 371 transitions, 4514 flow [2024-06-27 19:49:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:49:00,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 19:49:00,795 INFO L175 Difference]: Start difference. First operand has 270 places, 331 transitions, 3559 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:49:00,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 371 transitions, 4514 flow [2024-06-27 19:49:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 371 transitions, 4364 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:02,297 INFO L231 Difference]: Finished difference. Result has 276 places, 336 transitions, 3729 flow [2024-06-27 19:49:02,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3729, PETRI_PLACES=276, PETRI_TRANSITIONS=336} [2024-06-27 19:49:02,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-27 19:49:02,298 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 336 transitions, 3729 flow [2024-06-27 19:49:02,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:02,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:02,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:02,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:49:02,298 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:02,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:02,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1167739958, now seen corresponding path program 7 times [2024-06-27 19:49:02,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:02,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140479954] [2024-06-27 19:49:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:03,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140479954] [2024-06-27 19:49:03,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140479954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:03,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:03,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:03,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563440525] [2024-06-27 19:49:03,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:03,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:03,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:03,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 336 transitions, 3729 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:03,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:03,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:03,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:05,225 INFO L124 PetriNetUnfolderBase]: 3723/5998 cut-off events. [2024-06-27 19:49:05,225 INFO L125 PetriNetUnfolderBase]: For 963839/963842 co-relation queries the response was YES. [2024-06-27 19:49:05,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55529 conditions, 5998 events. 3723/5998 cut-off events. For 963839/963842 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36960 event pairs, 819 based on Foata normal form. 6/5998 useless extension candidates. Maximal degree in co-relation 55398. Up to 5294 conditions per place. [2024-06-27 19:49:05,306 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 264 selfloop transitions, 106 changer transitions 0/375 dead transitions. [2024-06-27 19:49:05,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 375 transitions, 4703 flow [2024-06-27 19:49:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 19:49:05,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 19:49:05,309 INFO L175 Difference]: Start difference. First operand has 276 places, 336 transitions, 3729 flow. Second operand 10 states and 191 transitions. [2024-06-27 19:49:05,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 375 transitions, 4703 flow [2024-06-27 19:49:06,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 375 transitions, 4424 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:06,754 INFO L231 Difference]: Finished difference. Result has 280 places, 342 transitions, 3810 flow [2024-06-27 19:49:06,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3810, PETRI_PLACES=280, PETRI_TRANSITIONS=342} [2024-06-27 19:49:06,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 19:49:06,755 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 342 transitions, 3810 flow [2024-06-27 19:49:06,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:06,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:06,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:06,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:49:06,755 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:06,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash -170549770, now seen corresponding path program 8 times [2024-06-27 19:49:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394513120] [2024-06-27 19:49:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:06,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:07,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394513120] [2024-06-27 19:49:07,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394513120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:07,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:07,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:07,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853329261] [2024-06-27 19:49:07,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:07,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:07,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:07,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:08,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:08,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 342 transitions, 3810 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:08,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:08,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:08,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:09,669 INFO L124 PetriNetUnfolderBase]: 3751/6026 cut-off events. [2024-06-27 19:49:09,669 INFO L125 PetriNetUnfolderBase]: For 986491/986494 co-relation queries the response was YES. [2024-06-27 19:49:09,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56470 conditions, 6026 events. 3751/6026 cut-off events. For 986491/986494 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37000 event pairs, 804 based on Foata normal form. 6/6026 useless extension candidates. Maximal degree in co-relation 56337. Up to 5333 conditions per place. [2024-06-27 19:49:09,753 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 275 selfloop transitions, 103 changer transitions 0/383 dead transitions. [2024-06-27 19:49:09,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 383 transitions, 4825 flow [2024-06-27 19:49:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:49:09,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 19:49:09,754 INFO L175 Difference]: Start difference. First operand has 280 places, 342 transitions, 3810 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:49:09,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 383 transitions, 4825 flow [2024-06-27 19:49:11,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 383 transitions, 4518 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:11,010 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 3890 flow [2024-06-27 19:49:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3890, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-27 19:49:11,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-27 19:49:11,011 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 3890 flow [2024-06-27 19:49:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:49:11,011 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1062987690, now seen corresponding path program 9 times [2024-06-27 19:49:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460265336] [2024-06-27 19:49:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:12,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460265336] [2024-06-27 19:49:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460265336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:12,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703479103] [2024-06-27 19:49:12,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:12,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:12,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:12,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:12,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:12,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:12,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 3890 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:12,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:12,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:13,960 INFO L124 PetriNetUnfolderBase]: 3793/6102 cut-off events. [2024-06-27 19:49:13,961 INFO L125 PetriNetUnfolderBase]: For 1026396/1026399 co-relation queries the response was YES. [2024-06-27 19:49:14,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58006 conditions, 6102 events. 3793/6102 cut-off events. For 1026396/1026399 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 37584 event pairs, 811 based on Foata normal form. 6/6102 useless extension candidates. Maximal degree in co-relation 57871. Up to 5316 conditions per place. [2024-06-27 19:49:14,031 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 275 selfloop transitions, 110 changer transitions 0/390 dead transitions. [2024-06-27 19:49:14,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 390 transitions, 5286 flow [2024-06-27 19:49:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:49:14,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:49:14,032 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 3890 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:49:14,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 390 transitions, 5286 flow [2024-06-27 19:49:15,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 390 transitions, 5018 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:15,927 INFO L231 Difference]: Finished difference. Result has 289 places, 354 transitions, 4045 flow [2024-06-27 19:49:15,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4045, PETRI_PLACES=289, PETRI_TRANSITIONS=354} [2024-06-27 19:49:15,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-27 19:49:15,928 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 354 transitions, 4045 flow [2024-06-27 19:49:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:15,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:15,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:15,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:49:15,928 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:15,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1070406300, now seen corresponding path program 10 times [2024-06-27 19:49:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:15,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012217130] [2024-06-27 19:49:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:15,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:17,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012217130] [2024-06-27 19:49:17,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012217130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:17,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:17,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991407886] [2024-06-27 19:49:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:17,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:17,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 354 transitions, 4045 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:17,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:17,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:17,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:18,864 INFO L124 PetriNetUnfolderBase]: 3785/6080 cut-off events. [2024-06-27 19:49:18,865 INFO L125 PetriNetUnfolderBase]: For 1030790/1030793 co-relation queries the response was YES. [2024-06-27 19:49:18,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57486 conditions, 6080 events. 3785/6080 cut-off events. For 1030790/1030793 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37357 event pairs, 804 based on Foata normal form. 6/6080 useless extension candidates. Maximal degree in co-relation 57350. Up to 5387 conditions per place. [2024-06-27 19:49:18,953 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 280 selfloop transitions, 102 changer transitions 0/387 dead transitions. [2024-06-27 19:49:18,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 387 transitions, 4913 flow [2024-06-27 19:49:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 19:49:18,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 19:49:18,954 INFO L175 Difference]: Start difference. First operand has 289 places, 354 transitions, 4045 flow. Second operand 10 states and 194 transitions. [2024-06-27 19:49:18,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 387 transitions, 4913 flow [2024-06-27 19:49:20,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 387 transitions, 4623 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 19:49:20,899 INFO L231 Difference]: Finished difference. Result has 293 places, 354 transitions, 3966 flow [2024-06-27 19:49:20,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3755, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3966, PETRI_PLACES=293, PETRI_TRANSITIONS=354} [2024-06-27 19:49:20,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-27 19:49:20,900 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 354 transitions, 3966 flow [2024-06-27 19:49:20,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:20,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:20,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:49:20,901 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:20,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 620597778, now seen corresponding path program 11 times [2024-06-27 19:49:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:20,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313988211] [2024-06-27 19:49:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313988211] [2024-06-27 19:49:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313988211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742199109] [2024-06-27 19:49:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:22,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:22,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 354 transitions, 3966 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:22,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:22,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:22,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:23,811 INFO L124 PetriNetUnfolderBase]: 3813/6123 cut-off events. [2024-06-27 19:49:23,811 INFO L125 PetriNetUnfolderBase]: For 1048546/1048549 co-relation queries the response was YES. [2024-06-27 19:49:23,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58035 conditions, 6123 events. 3813/6123 cut-off events. For 1048546/1048549 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37688 event pairs, 809 based on Foata normal form. 6/6123 useless extension candidates. Maximal degree in co-relation 57897. Up to 5426 conditions per place. [2024-06-27 19:49:23,894 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 273 selfloop transitions, 113 changer transitions 0/391 dead transitions. [2024-06-27 19:49:23,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 391 transitions, 4974 flow [2024-06-27 19:49:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:49:23,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 19:49:23,896 INFO L175 Difference]: Start difference. First operand has 293 places, 354 transitions, 3966 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:49:23,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 391 transitions, 4974 flow [2024-06-27 19:49:26,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 391 transitions, 4725 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 19:49:26,025 INFO L231 Difference]: Finished difference. Result has 293 places, 359 transitions, 4092 flow [2024-06-27 19:49:26,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4092, PETRI_PLACES=293, PETRI_TRANSITIONS=359} [2024-06-27 19:49:26,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-27 19:49:26,026 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 359 transitions, 4092 flow [2024-06-27 19:49:26,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:26,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:26,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:26,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:49:26,026 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:26,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:26,026 INFO L85 PathProgramCache]: Analyzing trace with hash 620866548, now seen corresponding path program 12 times [2024-06-27 19:49:26,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435849870] [2024-06-27 19:49:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:26,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435849870] [2024-06-27 19:49:27,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435849870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:27,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:27,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:27,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515832761] [2024-06-27 19:49:27,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:27,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:27,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:27,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 359 transitions, 4092 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:27,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:27,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:27,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:28,803 INFO L124 PetriNetUnfolderBase]: 3830/6150 cut-off events. [2024-06-27 19:49:28,803 INFO L125 PetriNetUnfolderBase]: For 1074021/1074024 co-relation queries the response was YES. [2024-06-27 19:49:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58703 conditions, 6150 events. 3830/6150 cut-off events. For 1074021/1074024 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 37879 event pairs, 804 based on Foata normal form. 6/6150 useless extension candidates. Maximal degree in co-relation 58565. Up to 5394 conditions per place. [2024-06-27 19:49:28,886 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 118 changer transitions 0/394 dead transitions. [2024-06-27 19:49:28,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 394 transitions, 5074 flow [2024-06-27 19:49:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:49:28,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 19:49:28,888 INFO L175 Difference]: Start difference. First operand has 293 places, 359 transitions, 4092 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:49:28,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 394 transitions, 5074 flow [2024-06-27 19:49:31,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 394 transitions, 4769 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:49:31,219 INFO L231 Difference]: Finished difference. Result has 297 places, 361 transitions, 4138 flow [2024-06-27 19:49:31,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3787, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4138, PETRI_PLACES=297, PETRI_TRANSITIONS=361} [2024-06-27 19:49:31,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-27 19:49:31,219 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 361 transitions, 4138 flow [2024-06-27 19:49:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:31,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:49:31,220 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 868759156, now seen corresponding path program 13 times [2024-06-27 19:49:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591024854] [2024-06-27 19:49:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:32,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:32,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591024854] [2024-06-27 19:49:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591024854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:32,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:32,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601912872] [2024-06-27 19:49:32,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:32,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:32,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:32,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 361 transitions, 4138 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:32,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:32,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:32,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:34,397 INFO L124 PetriNetUnfolderBase]: 3847/6177 cut-off events. [2024-06-27 19:49:34,398 INFO L125 PetriNetUnfolderBase]: For 1097346/1097349 co-relation queries the response was YES. [2024-06-27 19:49:34,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59238 conditions, 6177 events. 3847/6177 cut-off events. For 1097346/1097349 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38068 event pairs, 814 based on Foata normal form. 6/6177 useless extension candidates. Maximal degree in co-relation 59099. Up to 5480 conditions per place. [2024-06-27 19:49:34,484 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 270 selfloop transitions, 122 changer transitions 0/397 dead transitions. [2024-06-27 19:49:34,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 397 transitions, 5155 flow [2024-06-27 19:49:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:49:34,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:49:34,488 INFO L175 Difference]: Start difference. First operand has 297 places, 361 transitions, 4138 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:49:34,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 397 transitions, 5155 flow [2024-06-27 19:49:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 397 transitions, 4818 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:36,841 INFO L231 Difference]: Finished difference. Result has 299 places, 365 transitions, 4191 flow [2024-06-27 19:49:36,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4191, PETRI_PLACES=299, PETRI_TRANSITIONS=365} [2024-06-27 19:49:36,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-27 19:49:36,842 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 365 transitions, 4191 flow [2024-06-27 19:49:36,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:36,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:36,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:49:36,843 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:36,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash -912159970, now seen corresponding path program 14 times [2024-06-27 19:49:36,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:36,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846317630] [2024-06-27 19:49:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:38,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:38,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846317630] [2024-06-27 19:49:38,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846317630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:38,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835759095] [2024-06-27 19:49:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:38,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:38,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 365 transitions, 4191 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:38,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:38,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:38,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:39,931 INFO L124 PetriNetUnfolderBase]: 3864/6204 cut-off events. [2024-06-27 19:49:39,931 INFO L125 PetriNetUnfolderBase]: For 1120764/1120767 co-relation queries the response was YES. [2024-06-27 19:49:39,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59724 conditions, 6204 events. 3864/6204 cut-off events. For 1120764/1120767 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38232 event pairs, 814 based on Foata normal form. 6/6204 useless extension candidates. Maximal degree in co-relation 59584. Up to 5466 conditions per place. [2024-06-27 19:49:40,014 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 270 selfloop transitions, 125 changer transitions 0/400 dead transitions. [2024-06-27 19:49:40,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 400 transitions, 5193 flow [2024-06-27 19:49:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:49:40,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 19:49:40,015 INFO L175 Difference]: Start difference. First operand has 299 places, 365 transitions, 4191 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:49:40,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 400 transitions, 5193 flow [2024-06-27 19:49:42,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 400 transitions, 4892 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 19:49:42,248 INFO L231 Difference]: Finished difference. Result has 303 places, 367 transitions, 4263 flow [2024-06-27 19:49:42,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4263, PETRI_PLACES=303, PETRI_TRANSITIONS=367} [2024-06-27 19:49:42,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-27 19:49:42,249 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 367 transitions, 4263 flow [2024-06-27 19:49:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:42,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:42,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:49:42,249 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:42,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash -587418850, now seen corresponding path program 15 times [2024-06-27 19:49:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246995037] [2024-06-27 19:49:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:43,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246995037] [2024-06-27 19:49:43,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246995037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:43,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:43,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:43,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155819091] [2024-06-27 19:49:43,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:43,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:43,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:43,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 367 transitions, 4263 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:43,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:43,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:45,502 INFO L124 PetriNetUnfolderBase]: 3856/6202 cut-off events. [2024-06-27 19:49:45,502 INFO L125 PetriNetUnfolderBase]: For 1125261/1125264 co-relation queries the response was YES. [2024-06-27 19:49:45,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59435 conditions, 6202 events. 3856/6202 cut-off events. For 1125261/1125264 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38381 event pairs, 742 based on Foata normal form. 6/6202 useless extension candidates. Maximal degree in co-relation 59294. Up to 5105 conditions per place. [2024-06-27 19:49:45,590 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 156 changer transitions 0/403 dead transitions. [2024-06-27 19:49:45,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 403 transitions, 5277 flow [2024-06-27 19:49:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:49:45,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 19:49:45,591 INFO L175 Difference]: Start difference. First operand has 303 places, 367 transitions, 4263 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:49:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 403 transitions, 5277 flow [2024-06-27 19:49:48,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 403 transitions, 4922 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:48,304 INFO L231 Difference]: Finished difference. Result has 305 places, 369 transitions, 4347 flow [2024-06-27 19:49:48,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3908, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4347, PETRI_PLACES=305, PETRI_TRANSITIONS=369} [2024-06-27 19:49:48,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 19:49:48,304 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 369 transitions, 4347 flow [2024-06-27 19:49:48,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:48,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:48,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:49:48,305 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:48,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 717576564, now seen corresponding path program 5 times [2024-06-27 19:49:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:48,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869849328] [2024-06-27 19:49:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:49,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869849328] [2024-06-27 19:49:49,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869849328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:49,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:49,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:49:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402033858] [2024-06-27 19:49:49,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:49,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:49:49,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:49:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:49:49,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:49,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 369 transitions, 4347 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:49,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:49,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:49,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:50,448 INFO L124 PetriNetUnfolderBase]: 3861/6201 cut-off events. [2024-06-27 19:49:50,448 INFO L125 PetriNetUnfolderBase]: For 1134721/1134733 co-relation queries the response was YES. [2024-06-27 19:49:50,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59824 conditions, 6201 events. 3861/6201 cut-off events. For 1134721/1134733 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 38281 event pairs, 824 based on Foata normal form. 9/6203 useless extension candidates. Maximal degree in co-relation 59682. Up to 5831 conditions per place. [2024-06-27 19:49:50,537 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 328 selfloop transitions, 53 changer transitions 0/386 dead transitions. [2024-06-27 19:49:50,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 386 transitions, 5531 flow [2024-06-27 19:49:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:49:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:49:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 19:49:50,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 19:49:50,538 INFO L175 Difference]: Start difference. First operand has 305 places, 369 transitions, 4347 flow. Second operand 7 states and 127 transitions. [2024-06-27 19:49:50,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 386 transitions, 5531 flow [2024-06-27 19:49:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 386 transitions, 5110 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:53,016 INFO L231 Difference]: Finished difference. Result has 304 places, 375 transitions, 4232 flow [2024-06-27 19:49:53,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4232, PETRI_PLACES=304, PETRI_TRANSITIONS=375} [2024-06-27 19:49:53,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-27 19:49:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 375 transitions, 4232 flow [2024-06-27 19:49:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:53,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:49:53,017 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:53,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1214556650, now seen corresponding path program 6 times [2024-06-27 19:49:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144529846] [2024-06-27 19:49:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144529846] [2024-06-27 19:49:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144529846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:53,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:49:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526307252] [2024-06-27 19:49:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:53,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:49:53,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:49:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:49:53,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:49:53,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 375 transitions, 4232 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:53,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:53,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:49:53,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:55,181 INFO L124 PetriNetUnfolderBase]: 3858/6195 cut-off events. [2024-06-27 19:49:55,181 INFO L125 PetriNetUnfolderBase]: For 1149267/1149279 co-relation queries the response was YES. [2024-06-27 19:49:55,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59305 conditions, 6195 events. 3858/6195 cut-off events. For 1149267/1149279 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38232 event pairs, 824 based on Foata normal form. 9/6197 useless extension candidates. Maximal degree in co-relation 59162. Up to 5828 conditions per place. [2024-06-27 19:49:55,274 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 53 changer transitions 0/385 dead transitions. [2024-06-27 19:49:55,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 385 transitions, 5022 flow [2024-06-27 19:49:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:49:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:49:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 19:49:55,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:49:55,275 INFO L175 Difference]: Start difference. First operand has 304 places, 375 transitions, 4232 flow. Second operand 7 states and 126 transitions. [2024-06-27 19:49:55,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 385 transitions, 5022 flow [2024-06-27 19:49:57,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 385 transitions, 4776 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 19:49:57,378 INFO L231 Difference]: Finished difference. Result has 307 places, 375 transitions, 4098 flow [2024-06-27 19:49:57,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4098, PETRI_PLACES=307, PETRI_TRANSITIONS=375} [2024-06-27 19:49:57,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 19:49:57,379 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 375 transitions, 4098 flow [2024-06-27 19:49:57,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:57,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:57,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:57,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:49:57,379 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:57,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 717572007, now seen corresponding path program 4 times [2024-06-27 19:49:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:57,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711428666] [2024-06-27 19:49:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:49:58,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:58,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711428666] [2024-06-27 19:49:58,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711428666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:49:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108365597] [2024-06-27 19:49:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:58,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:49:58,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:58,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:49:58,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:49:58,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:49:58,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 375 transitions, 4098 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:49:58,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:58,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:49:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:59,834 INFO L124 PetriNetUnfolderBase]: 3508/5803 cut-off events. [2024-06-27 19:49:59,834 INFO L125 PetriNetUnfolderBase]: For 1172845/1172871 co-relation queries the response was YES. [2024-06-27 19:49:59,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56339 conditions, 5803 events. 3508/5803 cut-off events. For 1172845/1172871 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37359 event pairs, 784 based on Foata normal form. 9/5748 useless extension candidates. Maximal degree in co-relation 56195. Up to 4998 conditions per place. [2024-06-27 19:49:59,920 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 270 selfloop transitions, 35 changer transitions 0/390 dead transitions. [2024-06-27 19:49:59,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 390 transitions, 4812 flow [2024-06-27 19:49:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:49:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:49:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:49:59,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 19:49:59,921 INFO L175 Difference]: Start difference. First operand has 307 places, 375 transitions, 4098 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:49:59,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 390 transitions, 4812 flow [2024-06-27 19:50:02,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 390 transitions, 4686 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:02,282 INFO L231 Difference]: Finished difference. Result has 309 places, 378 transitions, 4120 flow [2024-06-27 19:50:02,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4120, PETRI_PLACES=309, PETRI_TRANSITIONS=378} [2024-06-27 19:50:02,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 19:50:02,282 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 378 transitions, 4120 flow [2024-06-27 19:50:02,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:02,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:02,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:50:02,283 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:02,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 717585027, now seen corresponding path program 5 times [2024-06-27 19:50:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569469744] [2024-06-27 19:50:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:03,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:03,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569469744] [2024-06-27 19:50:03,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569469744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:03,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:03,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123417074] [2024-06-27 19:50:03,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:03,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:03,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:03,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:03,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 378 transitions, 4120 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:03,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:03,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:04,780 INFO L124 PetriNetUnfolderBase]: 3513/5814 cut-off events. [2024-06-27 19:50:04,780 INFO L125 PetriNetUnfolderBase]: For 1193832/1193844 co-relation queries the response was YES. [2024-06-27 19:50:04,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57031 conditions, 5814 events. 3513/5814 cut-off events. For 1193832/1193844 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37432 event pairs, 786 based on Foata normal form. 14/5764 useless extension candidates. Maximal degree in co-relation 56886. Up to 4999 conditions per place. [2024-06-27 19:50:04,862 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 268 selfloop transitions, 40 changer transitions 0/393 dead transitions. [2024-06-27 19:50:04,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 393 transitions, 4846 flow [2024-06-27 19:50:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:50:04,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:50:04,863 INFO L175 Difference]: Start difference. First operand has 309 places, 378 transitions, 4120 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:50:04,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 393 transitions, 4846 flow [2024-06-27 19:50:06,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 393 transitions, 4720 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:06,913 INFO L231 Difference]: Finished difference. Result has 311 places, 381 transitions, 4158 flow [2024-06-27 19:50:06,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3994, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4158, PETRI_PLACES=311, PETRI_TRANSITIONS=381} [2024-06-27 19:50:06,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 19:50:06,913 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 381 transitions, 4158 flow [2024-06-27 19:50:06,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:06,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:06,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:50:06,914 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:06,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash 732822612, now seen corresponding path program 2 times [2024-06-27 19:50:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:06,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797276528] [2024-06-27 19:50:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:08,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:08,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797276528] [2024-06-27 19:50:08,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797276528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:08,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:08,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:08,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927648969] [2024-06-27 19:50:08,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:08,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:08,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:08,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:08,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 381 transitions, 4158 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:08,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:08,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:08,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:09,435 INFO L124 PetriNetUnfolderBase]: 3507/5814 cut-off events. [2024-06-27 19:50:09,435 INFO L125 PetriNetUnfolderBase]: For 1217107/1217119 co-relation queries the response was YES. [2024-06-27 19:50:09,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57651 conditions, 5814 events. 3507/5814 cut-off events. For 1217107/1217119 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37558 event pairs, 785 based on Foata normal form. 4/5760 useless extension candidates. Maximal degree in co-relation 57505. Up to 5082 conditions per place. [2024-06-27 19:50:09,519 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 294 selfloop transitions, 17 changer transitions 0/396 dead transitions. [2024-06-27 19:50:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 396 transitions, 4890 flow [2024-06-27 19:50:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:50:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:50:09,520 INFO L175 Difference]: Start difference. First operand has 311 places, 381 transitions, 4158 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:50:09,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 396 transitions, 4890 flow [2024-06-27 19:50:11,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 396 transitions, 4748 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:11,989 INFO L231 Difference]: Finished difference. Result has 313 places, 384 transitions, 4138 flow [2024-06-27 19:50:11,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4138, PETRI_PLACES=313, PETRI_TRANSITIONS=384} [2024-06-27 19:50:11,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-27 19:50:11,989 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 384 transitions, 4138 flow [2024-06-27 19:50:11,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:11,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:11,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:50:11,990 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:11,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash 717585492, now seen corresponding path program 3 times [2024-06-27 19:50:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:11,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895336855] [2024-06-27 19:50:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:13,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:13,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895336855] [2024-06-27 19:50:13,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895336855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:13,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:13,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190545658] [2024-06-27 19:50:13,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:13,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:13,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:13,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 384 transitions, 4138 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:13,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:13,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:13,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:14,437 INFO L124 PetriNetUnfolderBase]: 3529/5839 cut-off events. [2024-06-27 19:50:14,437 INFO L125 PetriNetUnfolderBase]: For 1238179/1238200 co-relation queries the response was YES. [2024-06-27 19:50:14,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58298 conditions, 5839 events. 3529/5839 cut-off events. For 1238179/1238200 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37628 event pairs, 780 based on Foata normal form. 10/5789 useless extension candidates. Maximal degree in co-relation 58151. Up to 5076 conditions per place. [2024-06-27 19:50:14,523 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 289 selfloop transitions, 25 changer transitions 0/399 dead transitions. [2024-06-27 19:50:14,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 399 transitions, 4884 flow [2024-06-27 19:50:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:50:14,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:50:14,528 INFO L175 Difference]: Start difference. First operand has 313 places, 384 transitions, 4138 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:50:14,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 399 transitions, 4884 flow [2024-06-27 19:50:17,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 399 transitions, 4754 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 19:50:17,631 INFO L231 Difference]: Finished difference. Result has 314 places, 387 transitions, 4152 flow [2024-06-27 19:50:17,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4152, PETRI_PLACES=314, PETRI_TRANSITIONS=387} [2024-06-27 19:50:17,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 19:50:17,632 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 387 transitions, 4152 flow [2024-06-27 19:50:17,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:17,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:17,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:50:17,632 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:17,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -236105324, now seen corresponding path program 4 times [2024-06-27 19:50:17,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:17,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073025726] [2024-06-27 19:50:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:18,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:18,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073025726] [2024-06-27 19:50:18,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073025726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:18,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:18,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144403086] [2024-06-27 19:50:18,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:18,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:18,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 387 transitions, 4152 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:18,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:18,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:18,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:20,088 INFO L124 PetriNetUnfolderBase]: 3523/5831 cut-off events. [2024-06-27 19:50:20,088 INFO L125 PetriNetUnfolderBase]: For 1246420/1246441 co-relation queries the response was YES. [2024-06-27 19:50:20,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58351 conditions, 5831 events. 3523/5831 cut-off events. For 1246420/1246441 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37560 event pairs, 775 based on Foata normal form. 10/5781 useless extension candidates. Maximal degree in co-relation 58204. Up to 5033 conditions per place. [2024-06-27 19:50:20,172 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 277 selfloop transitions, 42 changer transitions 0/404 dead transitions. [2024-06-27 19:50:20,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 404 transitions, 4922 flow [2024-06-27 19:50:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:50:20,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:50:20,173 INFO L175 Difference]: Start difference. First operand has 314 places, 387 transitions, 4152 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:50:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 404 transitions, 4922 flow [2024-06-27 19:50:22,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 404 transitions, 4800 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:22,178 INFO L231 Difference]: Finished difference. Result has 316 places, 390 transitions, 4214 flow [2024-06-27 19:50:22,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4214, PETRI_PLACES=316, PETRI_TRANSITIONS=390} [2024-06-27 19:50:22,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-27 19:50:22,179 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 390 transitions, 4214 flow [2024-06-27 19:50:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:22,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:22,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:22,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:50:22,179 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:22,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 732317157, now seen corresponding path program 6 times [2024-06-27 19:50:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19597127] [2024-06-27 19:50:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:22,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:23,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19597127] [2024-06-27 19:50:23,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19597127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:23,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:23,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131665735] [2024-06-27 19:50:23,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:23,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:23,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:23,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:23,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 390 transitions, 4214 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:23,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:23,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:23,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:24,663 INFO L124 PetriNetUnfolderBase]: 3521/5826 cut-off events. [2024-06-27 19:50:24,663 INFO L125 PetriNetUnfolderBase]: For 1254400/1254412 co-relation queries the response was YES. [2024-06-27 19:50:24,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58460 conditions, 5826 events. 3521/5826 cut-off events. For 1254400/1254412 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37456 event pairs, 784 based on Foata normal form. 14/5776 useless extension candidates. Maximal degree in co-relation 58312. Up to 4988 conditions per place. [2024-06-27 19:50:24,749 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 262 selfloop transitions, 58 changer transitions 0/405 dead transitions. [2024-06-27 19:50:24,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 405 transitions, 4976 flow [2024-06-27 19:50:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:50:24,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:50:24,750 INFO L175 Difference]: Start difference. First operand has 316 places, 390 transitions, 4214 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:50:24,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 405 transitions, 4976 flow [2024-06-27 19:50:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 405 transitions, 4814 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:26,927 INFO L231 Difference]: Finished difference. Result has 318 places, 393 transitions, 4264 flow [2024-06-27 19:50:26,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=318, PETRI_TRANSITIONS=393} [2024-06-27 19:50:26,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-27 19:50:26,928 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 393 transitions, 4264 flow [2024-06-27 19:50:26,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:26,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:26,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:26,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:50:26,929 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:26,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1391799212, now seen corresponding path program 1 times [2024-06-27 19:50:26,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:26,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187753250] [2024-06-27 19:50:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187753250] [2024-06-27 19:50:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187753250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:27,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:27,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843877147] [2024-06-27 19:50:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:27,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:27,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 393 transitions, 4264 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:27,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:27,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:27,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:29,490 INFO L124 PetriNetUnfolderBase]: 3599/5919 cut-off events. [2024-06-27 19:50:29,490 INFO L125 PetriNetUnfolderBase]: For 1265333/1265354 co-relation queries the response was YES. [2024-06-27 19:50:29,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59498 conditions, 5919 events. 3599/5919 cut-off events. For 1265333/1265354 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 37723 event pairs, 752 based on Foata normal form. 22/5905 useless extension candidates. Maximal degree in co-relation 59349. Up to 5307 conditions per place. [2024-06-27 19:50:29,568 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 17 changer transitions 0/415 dead transitions. [2024-06-27 19:50:29,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 415 transitions, 5124 flow [2024-06-27 19:50:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:50:29,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:50:29,569 INFO L175 Difference]: Start difference. First operand has 318 places, 393 transitions, 4264 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:50:29,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 415 transitions, 5124 flow [2024-06-27 19:50:32,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 415 transitions, 4934 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:32,750 INFO L231 Difference]: Finished difference. Result has 320 places, 396 transitions, 4196 flow [2024-06-27 19:50:32,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4196, PETRI_PLACES=320, PETRI_TRANSITIONS=396} [2024-06-27 19:50:32,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-27 19:50:32,750 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 396 transitions, 4196 flow [2024-06-27 19:50:32,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:32,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:32,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:32,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:50:32,751 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:32,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1493173512, now seen corresponding path program 1 times [2024-06-27 19:50:32,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:32,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696467364] [2024-06-27 19:50:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:33,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:33,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696467364] [2024-06-27 19:50:33,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696467364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:33,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:33,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:33,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438382391] [2024-06-27 19:50:33,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:33,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:33,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:33,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:33,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 396 transitions, 4196 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:33,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:33,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:33,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:35,253 INFO L124 PetriNetUnfolderBase]: 3613/5941 cut-off events. [2024-06-27 19:50:35,253 INFO L125 PetriNetUnfolderBase]: For 1313986/1314012 co-relation queries the response was YES. [2024-06-27 19:50:35,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60144 conditions, 5941 events. 3613/5941 cut-off events. For 1313986/1314012 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 37877 event pairs, 751 based on Foata normal form. 25/5930 useless extension candidates. Maximal degree in co-relation 59994. Up to 5327 conditions per place. [2024-06-27 19:50:35,341 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 348 selfloop transitions, 18 changer transitions 0/417 dead transitions. [2024-06-27 19:50:35,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 417 transitions, 5048 flow [2024-06-27 19:50:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:50:35,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:50:35,342 INFO L175 Difference]: Start difference. First operand has 320 places, 396 transitions, 4196 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:50:35,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 417 transitions, 5048 flow [2024-06-27 19:50:38,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 417 transitions, 4948 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:38,566 INFO L231 Difference]: Finished difference. Result has 322 places, 400 transitions, 4211 flow [2024-06-27 19:50:38,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4211, PETRI_PLACES=322, PETRI_TRANSITIONS=400} [2024-06-27 19:50:38,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-27 19:50:38,567 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 400 transitions, 4211 flow [2024-06-27 19:50:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:38,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:38,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:50:38,567 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:38,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1488525372, now seen corresponding path program 2 times [2024-06-27 19:50:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941499009] [2024-06-27 19:50:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:38,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941499009] [2024-06-27 19:50:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941499009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:39,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:39,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63853686] [2024-06-27 19:50:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:39,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:39,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 400 transitions, 4211 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:39,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:39,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:39,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:41,020 INFO L124 PetriNetUnfolderBase]: 3639/5991 cut-off events. [2024-06-27 19:50:41,020 INFO L125 PetriNetUnfolderBase]: For 1344485/1344511 co-relation queries the response was YES. [2024-06-27 19:50:41,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61738 conditions, 5991 events. 3639/5991 cut-off events. For 1344485/1344511 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38296 event pairs, 752 based on Foata normal form. 28/5983 useless extension candidates. Maximal degree in co-relation 61587. Up to 5336 conditions per place. [2024-06-27 19:50:41,108 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 339 selfloop transitions, 32 changer transitions 0/422 dead transitions. [2024-06-27 19:50:41,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 422 transitions, 5347 flow [2024-06-27 19:50:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:50:41,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:50:41,109 INFO L175 Difference]: Start difference. First operand has 322 places, 400 transitions, 4211 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:50:41,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 422 transitions, 5347 flow [2024-06-27 19:50:43,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 422 transitions, 5260 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:43,792 INFO L231 Difference]: Finished difference. Result has 325 places, 407 transitions, 4340 flow [2024-06-27 19:50:43,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4340, PETRI_PLACES=325, PETRI_TRANSITIONS=407} [2024-06-27 19:50:43,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 19:50:43,792 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 407 transitions, 4340 flow [2024-06-27 19:50:43,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:43,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:43,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:50:43,793 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:43,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1488531882, now seen corresponding path program 3 times [2024-06-27 19:50:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:43,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317565116] [2024-06-27 19:50:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:44,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317565116] [2024-06-27 19:50:44,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317565116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:44,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:44,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985376877] [2024-06-27 19:50:44,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:44,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:44,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:44,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 407 transitions, 4340 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:44,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:44,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:44,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:46,261 INFO L124 PetriNetUnfolderBase]: 3627/5965 cut-off events. [2024-06-27 19:50:46,261 INFO L125 PetriNetUnfolderBase]: For 1357591/1357612 co-relation queries the response was YES. [2024-06-27 19:50:46,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62369 conditions, 5965 events. 3627/5965 cut-off events. For 1357591/1357612 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38082 event pairs, 750 based on Foata normal form. 25/5954 useless extension candidates. Maximal degree in co-relation 62216. Up to 5338 conditions per place. [2024-06-27 19:50:46,350 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 348 selfloop transitions, 23 changer transitions 0/422 dead transitions. [2024-06-27 19:50:46,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 422 transitions, 5150 flow [2024-06-27 19:50:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:50:46,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:50:46,351 INFO L175 Difference]: Start difference. First operand has 325 places, 407 transitions, 4340 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:50:46,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 422 transitions, 5150 flow [2024-06-27 19:50:49,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 422 transitions, 5034 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:49,388 INFO L231 Difference]: Finished difference. Result has 329 places, 407 transitions, 4277 flow [2024-06-27 19:50:49,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4277, PETRI_PLACES=329, PETRI_TRANSITIONS=407} [2024-06-27 19:50:49,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 19:50:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 407 transitions, 4277 flow [2024-06-27 19:50:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:49,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:49,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:49,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:50:49,389 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:49,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash 732532638, now seen corresponding path program 4 times [2024-06-27 19:50:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757996913] [2024-06-27 19:50:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:49,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757996913] [2024-06-27 19:50:50,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757996913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:50,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316497484] [2024-06-27 19:50:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:50,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:50,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:50,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 407 transitions, 4277 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:50,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:50,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:50,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:52,055 INFO L124 PetriNetUnfolderBase]: 3656/6011 cut-off events. [2024-06-27 19:50:52,055 INFO L125 PetriNetUnfolderBase]: For 1394068/1394092 co-relation queries the response was YES. [2024-06-27 19:50:52,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63317 conditions, 6011 events. 3656/6011 cut-off events. For 1394068/1394092 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38378 event pairs, 752 based on Foata normal form. 26/5999 useless extension candidates. Maximal degree in co-relation 63162. Up to 5278 conditions per place. [2024-06-27 19:50:52,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 326 selfloop transitions, 52 changer transitions 0/429 dead transitions. [2024-06-27 19:50:52,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 429 transitions, 5479 flow [2024-06-27 19:50:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:50:52,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:50:52,149 INFO L175 Difference]: Start difference. First operand has 329 places, 407 transitions, 4277 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:50:52,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 429 transitions, 5479 flow [2024-06-27 19:50:55,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 429 transitions, 5410 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:50:55,104 INFO L231 Difference]: Finished difference. Result has 331 places, 414 transitions, 4508 flow [2024-06-27 19:50:55,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4508, PETRI_PLACES=331, PETRI_TRANSITIONS=414} [2024-06-27 19:50:55,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 19:50:55,104 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 414 transitions, 4508 flow [2024-06-27 19:50:55,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:55,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:55,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:55,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:50:55,104 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:55,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:55,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1316041992, now seen corresponding path program 5 times [2024-06-27 19:50:55,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:55,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618604971] [2024-06-27 19:50:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:56,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618604971] [2024-06-27 19:50:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618604971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:56,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:56,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:56,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096751834] [2024-06-27 19:50:56,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:56,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:56,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:56,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:50:56,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 414 transitions, 4508 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:56,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:56,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:50:56,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:57,663 INFO L124 PetriNetUnfolderBase]: 3653/6018 cut-off events. [2024-06-27 19:50:57,663 INFO L125 PetriNetUnfolderBase]: For 1419117/1419149 co-relation queries the response was YES. [2024-06-27 19:50:57,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64425 conditions, 6018 events. 3653/6018 cut-off events. For 1419117/1419149 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38560 event pairs, 761 based on Foata normal form. 27/6006 useless extension candidates. Maximal degree in co-relation 64268. Up to 5363 conditions per place. [2024-06-27 19:50:57,751 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 30 changer transitions 0/430 dead transitions. [2024-06-27 19:50:57,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 430 transitions, 5423 flow [2024-06-27 19:50:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:50:57,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:50:57,752 INFO L175 Difference]: Start difference. First operand has 331 places, 414 transitions, 4508 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:50:57,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 430 transitions, 5423 flow [2024-06-27 19:51:01,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 430 transitions, 5312 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:51:01,455 INFO L231 Difference]: Finished difference. Result has 335 places, 418 transitions, 4563 flow [2024-06-27 19:51:01,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4563, PETRI_PLACES=335, PETRI_TRANSITIONS=418} [2024-06-27 19:51:01,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 19:51:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 418 transitions, 4563 flow [2024-06-27 19:51:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:01,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:51:01,456 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:01,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1316035482, now seen corresponding path program 6 times [2024-06-27 19:51:01,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:01,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781354249] [2024-06-27 19:51:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:01,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:02,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781354249] [2024-06-27 19:51:02,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781354249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:02,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:02,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:02,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738822101] [2024-06-27 19:51:02,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:02,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:51:02,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 418 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:02,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:02,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:51:02,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:04,183 INFO L124 PetriNetUnfolderBase]: 3649/6012 cut-off events. [2024-06-27 19:51:04,183 INFO L125 PetriNetUnfolderBase]: For 1412550/1412582 co-relation queries the response was YES. [2024-06-27 19:51:04,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64402 conditions, 6012 events. 3649/6012 cut-off events. For 1412550/1412582 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38518 event pairs, 760 based on Foata normal form. 24/5998 useless extension candidates. Maximal degree in co-relation 64243. Up to 5352 conditions per place. [2024-06-27 19:51:04,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 35 changer transitions 0/436 dead transitions. [2024-06-27 19:51:04,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 436 transitions, 5490 flow [2024-06-27 19:51:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:51:04,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:51:04,268 INFO L175 Difference]: Start difference. First operand has 335 places, 418 transitions, 4563 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:51:04,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 436 transitions, 5490 flow [2024-06-27 19:51:07,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 436 transitions, 5367 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:07,556 INFO L231 Difference]: Finished difference. Result has 338 places, 424 transitions, 4630 flow [2024-06-27 19:51:07,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4444, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4630, PETRI_PLACES=338, PETRI_TRANSITIONS=424} [2024-06-27 19:51:07,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 19:51:07,556 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 424 transitions, 4630 flow [2024-06-27 19:51:07,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:07,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:07,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:07,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:51:07,557 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:07,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 732840468, now seen corresponding path program 1 times [2024-06-27 19:51:07,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:07,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299563137] [2024-06-27 19:51:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:07,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:08,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299563137] [2024-06-27 19:51:08,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299563137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:08,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:08,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:51:08,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224988548] [2024-06-27 19:51:08,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:08,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:51:08,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:51:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:51:09,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:51:09,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 424 transitions, 4630 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:09,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:09,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:51:09,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:10,603 INFO L124 PetriNetUnfolderBase]: 3390/5705 cut-off events. [2024-06-27 19:51:10,604 INFO L125 PetriNetUnfolderBase]: For 1423068/1423098 co-relation queries the response was YES. [2024-06-27 19:51:10,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62020 conditions, 5705 events. 3390/5705 cut-off events. For 1423068/1423098 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37526 event pairs, 745 based on Foata normal form. 18/5649 useless extension candidates. Maximal degree in co-relation 61859. Up to 4813 conditions per place. [2024-06-27 19:51:10,684 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 301 selfloop transitions, 19 changer transitions 0/441 dead transitions. [2024-06-27 19:51:10,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 441 transitions, 5414 flow [2024-06-27 19:51:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:51:10,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:51:10,686 INFO L175 Difference]: Start difference. First operand has 338 places, 424 transitions, 4630 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:51:10,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 441 transitions, 5414 flow [2024-06-27 19:51:13,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 441 transitions, 5324 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:51:13,326 INFO L231 Difference]: Finished difference. Result has 344 places, 429 transitions, 4707 flow [2024-06-27 19:51:13,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4707, PETRI_PLACES=344, PETRI_TRANSITIONS=429} [2024-06-27 19:51:13,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 19:51:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 429 transitions, 4707 flow [2024-06-27 19:51:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:13,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:13,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:13,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:51:13,327 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:13,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1631784314, now seen corresponding path program 1 times [2024-06-27 19:51:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628087272] [2024-06-27 19:51:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:13,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628087272] [2024-06-27 19:51:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628087272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:14,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:14,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279012283] [2024-06-27 19:51:14,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:14,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:14,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:14,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:14,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 429 transitions, 4707 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:14,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:14,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:14,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:15,696 INFO L124 PetriNetUnfolderBase]: 3970/6363 cut-off events. [2024-06-27 19:51:15,696 INFO L125 PetriNetUnfolderBase]: For 1432436/1432443 co-relation queries the response was YES. [2024-06-27 19:51:15,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66928 conditions, 6363 events. 3970/6363 cut-off events. For 1432436/1432443 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39222 event pairs, 804 based on Foata normal form. 7/6368 useless extension candidates. Maximal degree in co-relation 66764. Up to 5924 conditions per place. [2024-06-27 19:51:15,793 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 390 selfloop transitions, 62 changer transitions 0/457 dead transitions. [2024-06-27 19:51:15,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 457 transitions, 5787 flow [2024-06-27 19:51:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:51:15,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 19:51:15,794 INFO L175 Difference]: Start difference. First operand has 344 places, 429 transitions, 4707 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:51:15,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 457 transitions, 5787 flow [2024-06-27 19:51:19,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 457 transitions, 5662 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:19,309 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4816 flow [2024-06-27 19:51:19,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4582, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4816, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-27 19:51:19,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 19:51:19,309 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4816 flow [2024-06-27 19:51:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:19,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:19,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:19,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:51:19,310 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1625118074, now seen corresponding path program 2 times [2024-06-27 19:51:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622962573] [2024-06-27 19:51:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:20,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622962573] [2024-06-27 19:51:20,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622962573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:20,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:20,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:20,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702886306] [2024-06-27 19:51:20,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:20,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:20,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:20,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:20,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4816 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:21,711 INFO L124 PetriNetUnfolderBase]: 3983/6384 cut-off events. [2024-06-27 19:51:21,711 INFO L125 PetriNetUnfolderBase]: For 1462637/1462644 co-relation queries the response was YES. [2024-06-27 19:51:21,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67844 conditions, 6384 events. 3983/6384 cut-off events. For 1462637/1462644 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39456 event pairs, 808 based on Foata normal form. 7/6389 useless extension candidates. Maximal degree in co-relation 67679. Up to 5918 conditions per place. [2024-06-27 19:51:21,804 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 389 selfloop transitions, 68 changer transitions 0/462 dead transitions. [2024-06-27 19:51:21,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 462 transitions, 6247 flow [2024-06-27 19:51:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:51:21,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:51:21,806 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4816 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:51:21,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 462 transitions, 6247 flow [2024-06-27 19:51:24,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 462 transitions, 6039 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:24,456 INFO L231 Difference]: Finished difference. Result has 349 places, 440 transitions, 4995 flow [2024-06-27 19:51:24,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4995, PETRI_PLACES=349, PETRI_TRANSITIONS=440} [2024-06-27 19:51:24,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-27 19:51:24,457 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 440 transitions, 4995 flow [2024-06-27 19:51:24,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:24,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:24,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:24,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:51:24,457 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:24,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:24,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1381551823, now seen corresponding path program 1 times [2024-06-27 19:51:24,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:24,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701306081] [2024-06-27 19:51:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:24,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:25,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701306081] [2024-06-27 19:51:25,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701306081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:25,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:25,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:51:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219491823] [2024-06-27 19:51:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:51:25,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:51:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:51:25,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:25,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 440 transitions, 4995 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:25,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:25,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:25,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:27,769 INFO L124 PetriNetUnfolderBase]: 4147/6677 cut-off events. [2024-06-27 19:51:27,769 INFO L125 PetriNetUnfolderBase]: For 1556392/1556399 co-relation queries the response was YES. [2024-06-27 19:51:27,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70269 conditions, 6677 events. 4147/6677 cut-off events. For 1556392/1556399 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41929 event pairs, 775 based on Foata normal form. 16/6689 useless extension candidates. Maximal degree in co-relation 70102. Up to 5296 conditions per place. [2024-06-27 19:51:27,875 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 353 selfloop transitions, 142 changer transitions 0/500 dead transitions. [2024-06-27 19:51:27,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 500 transitions, 6441 flow [2024-06-27 19:51:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:51:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:51:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 19:51:27,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 19:51:27,876 INFO L175 Difference]: Start difference. First operand has 349 places, 440 transitions, 4995 flow. Second operand 11 states and 222 transitions. [2024-06-27 19:51:27,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 500 transitions, 6441 flow [2024-06-27 19:51:32,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 500 transitions, 6256 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 19:51:32,537 INFO L231 Difference]: Finished difference. Result has 358 places, 451 transitions, 5354 flow [2024-06-27 19:51:32,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5354, PETRI_PLACES=358, PETRI_TRANSITIONS=451} [2024-06-27 19:51:32,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-27 19:51:32,538 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 451 transitions, 5354 flow [2024-06-27 19:51:32,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:32,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:32,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:51:32,538 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:32,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1487893784, now seen corresponding path program 3 times [2024-06-27 19:51:32,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:32,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204831912] [2024-06-27 19:51:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:33,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:33,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204831912] [2024-06-27 19:51:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204831912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:33,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110782689] [2024-06-27 19:51:33,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:33,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:33,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:33,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 451 transitions, 5354 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:33,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:33,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:33,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:34,988 INFO L124 PetriNetUnfolderBase]: 4152/6704 cut-off events. [2024-06-27 19:51:34,988 INFO L125 PetriNetUnfolderBase]: For 1533621/1533624 co-relation queries the response was YES. [2024-06-27 19:51:35,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71511 conditions, 6704 events. 4152/6704 cut-off events. For 1533621/1533624 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 42262 event pairs, 828 based on Foata normal form. 3/6705 useless extension candidates. Maximal degree in co-relation 71340. Up to 6233 conditions per place. [2024-06-27 19:51:35,093 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 58 changer transitions 0/477 dead transitions. [2024-06-27 19:51:35,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 477 transitions, 6461 flow [2024-06-27 19:51:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:51:35,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:51:35,094 INFO L175 Difference]: Start difference. First operand has 358 places, 451 transitions, 5354 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:51:35,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 477 transitions, 6461 flow [2024-06-27 19:51:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 477 transitions, 6126 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:39,217 INFO L231 Difference]: Finished difference. Result has 360 places, 454 transitions, 5238 flow [2024-06-27 19:51:39,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5019, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5238, PETRI_PLACES=360, PETRI_TRANSITIONS=454} [2024-06-27 19:51:39,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-27 19:51:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 454 transitions, 5238 flow [2024-06-27 19:51:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:39,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:39,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:51:39,218 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:39,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1487685247, now seen corresponding path program 1 times [2024-06-27 19:51:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:39,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481195406] [2024-06-27 19:51:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:39,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481195406] [2024-06-27 19:51:39,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481195406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:39,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750348856] [2024-06-27 19:51:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:39,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:39,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:40,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:40,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 454 transitions, 5238 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:40,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:40,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:40,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:41,697 INFO L124 PetriNetUnfolderBase]: 4162/6721 cut-off events. [2024-06-27 19:51:41,697 INFO L125 PetriNetUnfolderBase]: For 1553893/1553900 co-relation queries the response was YES. [2024-06-27 19:51:41,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71048 conditions, 6721 events. 4162/6721 cut-off events. For 1553893/1553900 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42395 event pairs, 819 based on Foata normal form. 8/6726 useless extension candidates. Maximal degree in co-relation 70876. Up to 6298 conditions per place. [2024-06-27 19:51:41,797 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 439 selfloop transitions, 37 changer transitions 0/481 dead transitions. [2024-06-27 19:51:41,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 481 transitions, 6380 flow [2024-06-27 19:51:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:51:41,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:51:41,798 INFO L175 Difference]: Start difference. First operand has 360 places, 454 transitions, 5238 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:51:41,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 481 transitions, 6380 flow [2024-06-27 19:51:45,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 481 transitions, 6196 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:45,869 INFO L231 Difference]: Finished difference. Result has 362 places, 457 transitions, 5236 flow [2024-06-27 19:51:45,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5236, PETRI_PLACES=362, PETRI_TRANSITIONS=457} [2024-06-27 19:51:45,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 19:51:45,869 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 457 transitions, 5236 flow [2024-06-27 19:51:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:45,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:45,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:45,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:51:45,870 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:45,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash -873331230, now seen corresponding path program 1 times [2024-06-27 19:51:45,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:45,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106822856] [2024-06-27 19:51:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106822856] [2024-06-27 19:51:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106822856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:46,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:46,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491912961] [2024-06-27 19:51:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:46,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:46,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 457 transitions, 5236 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:46,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:46,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:46,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:48,591 INFO L124 PetriNetUnfolderBase]: 4167/6727 cut-off events. [2024-06-27 19:51:48,592 INFO L125 PetriNetUnfolderBase]: For 1572816/1572823 co-relation queries the response was YES. [2024-06-27 19:51:48,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71678 conditions, 6727 events. 4167/6727 cut-off events. For 1572816/1572823 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42470 event pairs, 824 based on Foata normal form. 7/6732 useless extension candidates. Maximal degree in co-relation 71505. Up to 6347 conditions per place. [2024-06-27 19:51:48,693 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 31 changer transitions 0/480 dead transitions. [2024-06-27 19:51:48,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 480 transitions, 6342 flow [2024-06-27 19:51:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 19:51:48,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 19:51:48,694 INFO L175 Difference]: Start difference. First operand has 362 places, 457 transitions, 5236 flow. Second operand 8 states and 146 transitions. [2024-06-27 19:51:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 480 transitions, 6342 flow [2024-06-27 19:51:53,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 480 transitions, 6205 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 19:51:53,577 INFO L231 Difference]: Finished difference. Result has 365 places, 460 transitions, 5265 flow [2024-06-27 19:51:53,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5099, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5265, PETRI_PLACES=365, PETRI_TRANSITIONS=460} [2024-06-27 19:51:53,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 19:51:53,578 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 460 transitions, 5265 flow [2024-06-27 19:51:53,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:53,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:53,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:51:53,578 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:53,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2083404487, now seen corresponding path program 2 times [2024-06-27 19:51:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:53,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384107353] [2024-06-27 19:51:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:53,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384107353] [2024-06-27 19:51:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384107353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858453567] [2024-06-27 19:51:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:54,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:54,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:51:54,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 460 transitions, 5265 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:54,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:54,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:51:54,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:56,354 INFO L124 PetriNetUnfolderBase]: 4177/6744 cut-off events. [2024-06-27 19:51:56,354 INFO L125 PetriNetUnfolderBase]: For 1605601/1605608 co-relation queries the response was YES. [2024-06-27 19:51:56,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72241 conditions, 6744 events. 4177/6744 cut-off events. For 1605601/1605608 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42601 event pairs, 818 based on Foata normal form. 8/6749 useless extension candidates. Maximal degree in co-relation 72067. Up to 6308 conditions per place. [2024-06-27 19:51:56,454 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 439 selfloop transitions, 41 changer transitions 0/485 dead transitions. [2024-06-27 19:51:56,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 485 transitions, 6433 flow [2024-06-27 19:51:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:51:56,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:51:56,456 INFO L175 Difference]: Start difference. First operand has 365 places, 460 transitions, 5265 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:51:56,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 485 transitions, 6433 flow [2024-06-27 19:52:00,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 485 transitions, 6289 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:00,807 INFO L231 Difference]: Finished difference. Result has 367 places, 463 transitions, 5319 flow [2024-06-27 19:52:00,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5121, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5319, PETRI_PLACES=367, PETRI_TRANSITIONS=463} [2024-06-27 19:52:00,807 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 19:52:00,807 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 463 transitions, 5319 flow [2024-06-27 19:52:00,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:00,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:00,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:00,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:52:00,808 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1487535734, now seen corresponding path program 4 times [2024-06-27 19:52:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:00,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511815002] [2024-06-27 19:52:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:00,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:01,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511815002] [2024-06-27 19:52:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511815002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:01,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:01,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892095497] [2024-06-27 19:52:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:01,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:01,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 463 transitions, 5319 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:01,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:01,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:01,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:03,341 INFO L124 PetriNetUnfolderBase]: 4182/6750 cut-off events. [2024-06-27 19:52:03,342 INFO L125 PetriNetUnfolderBase]: For 1626109/1626112 co-relation queries the response was YES. [2024-06-27 19:52:03,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72992 conditions, 6750 events. 4182/6750 cut-off events. For 1626109/1626112 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42675 event pairs, 826 based on Foata normal form. 3/6751 useless extension candidates. Maximal degree in co-relation 72817. Up to 6260 conditions per place. [2024-06-27 19:52:03,685 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 415 selfloop transitions, 65 changer transitions 0/485 dead transitions. [2024-06-27 19:52:03,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 485 transitions, 6451 flow [2024-06-27 19:52:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:52:03,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:52:03,686 INFO L175 Difference]: Start difference. First operand has 367 places, 463 transitions, 5319 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:52:03,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 485 transitions, 6451 flow [2024-06-27 19:52:08,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 485 transitions, 6279 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:08,118 INFO L231 Difference]: Finished difference. Result has 369 places, 466 transitions, 5403 flow [2024-06-27 19:52:08,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=369, PETRI_TRANSITIONS=466} [2024-06-27 19:52:08,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-27 19:52:08,119 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 466 transitions, 5403 flow [2024-06-27 19:52:08,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:08,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:08,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:08,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:52:08,119 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:08,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1280881860, now seen corresponding path program 2 times [2024-06-27 19:52:08,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:08,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028725046] [2024-06-27 19:52:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:09,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:09,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028725046] [2024-06-27 19:52:09,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028725046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:09,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:09,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689262332] [2024-06-27 19:52:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:09,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:09,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 466 transitions, 5403 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:09,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:09,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:09,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:10,751 INFO L124 PetriNetUnfolderBase]: 4187/6748 cut-off events. [2024-06-27 19:52:10,751 INFO L125 PetriNetUnfolderBase]: For 1651104/1651111 co-relation queries the response was YES. [2024-06-27 19:52:10,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73509 conditions, 6748 events. 4187/6748 cut-off events. For 1651104/1651111 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42466 event pairs, 818 based on Foata normal form. 7/6753 useless extension candidates. Maximal degree in co-relation 73333. Up to 6362 conditions per place. [2024-06-27 19:52:11,099 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 441 selfloop transitions, 39 changer transitions 0/485 dead transitions. [2024-06-27 19:52:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 485 transitions, 6513 flow [2024-06-27 19:52:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:52:11,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:52:11,100 INFO L175 Difference]: Start difference. First operand has 369 places, 466 transitions, 5403 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:52:11,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 485 transitions, 6513 flow [2024-06-27 19:52:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 485 transitions, 6279 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:16,005 INFO L231 Difference]: Finished difference. Result has 371 places, 469 transitions, 5361 flow [2024-06-27 19:52:16,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5169, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5361, PETRI_PLACES=371, PETRI_TRANSITIONS=469} [2024-06-27 19:52:16,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-27 19:52:16,006 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 469 transitions, 5361 flow [2024-06-27 19:52:16,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:16,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:16,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:52:16,006 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:16,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash -171328661, now seen corresponding path program 3 times [2024-06-27 19:52:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:16,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449545410] [2024-06-27 19:52:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:16,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:16,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449545410] [2024-06-27 19:52:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449545410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:16,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:16,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:16,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550131514] [2024-06-27 19:52:16,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:16,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:16,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:17,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:17,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 469 transitions, 5361 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:17,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:17,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:18,598 INFO L124 PetriNetUnfolderBase]: 4213/6789 cut-off events. [2024-06-27 19:52:18,598 INFO L125 PetriNetUnfolderBase]: For 1701142/1701149 co-relation queries the response was YES. [2024-06-27 19:52:18,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74652 conditions, 6789 events. 4213/6789 cut-off events. For 1701142/1701149 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42808 event pairs, 823 based on Foata normal form. 8/6794 useless extension candidates. Maximal degree in co-relation 74475. Up to 6326 conditions per place. [2024-06-27 19:52:18,710 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 436 selfloop transitions, 53 changer transitions 0/494 dead transitions. [2024-06-27 19:52:18,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 494 transitions, 6909 flow [2024-06-27 19:52:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:52:18,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 19:52:18,712 INFO L175 Difference]: Start difference. First operand has 371 places, 469 transitions, 5361 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:52:18,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 494 transitions, 6909 flow [2024-06-27 19:52:24,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 494 transitions, 6739 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:24,559 INFO L231 Difference]: Finished difference. Result has 373 places, 475 transitions, 5537 flow [2024-06-27 19:52:24,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5537, PETRI_PLACES=373, PETRI_TRANSITIONS=475} [2024-06-27 19:52:24,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-27 19:52:24,560 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 475 transitions, 5537 flow [2024-06-27 19:52:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:24,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:24,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:24,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:52:24,560 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:24,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -666678224, now seen corresponding path program 5 times [2024-06-27 19:52:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:24,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141669789] [2024-06-27 19:52:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:24,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:25,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:25,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141669789] [2024-06-27 19:52:25,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141669789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:25,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:25,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:25,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310665454] [2024-06-27 19:52:25,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:25,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:25,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:25,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:25,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:25,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:25,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 475 transitions, 5537 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:25,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:25,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:25,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:27,243 INFO L124 PetriNetUnfolderBase]: 4234/6829 cut-off events. [2024-06-27 19:52:27,243 INFO L125 PetriNetUnfolderBase]: For 1743631/1743634 co-relation queries the response was YES. [2024-06-27 19:52:27,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76090 conditions, 6829 events. 4234/6829 cut-off events. For 1743631/1743634 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43157 event pairs, 839 based on Foata normal form. 3/6830 useless extension candidates. Maximal degree in co-relation 75912. Up to 6287 conditions per place. [2024-06-27 19:52:27,361 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 411 selfloop transitions, 87 changer transitions 0/503 dead transitions. [2024-06-27 19:52:27,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 503 transitions, 7470 flow [2024-06-27 19:52:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:52:27,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:52:27,362 INFO L175 Difference]: Start difference. First operand has 373 places, 475 transitions, 5537 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:52:27,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 503 transitions, 7470 flow [2024-06-27 19:52:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 503 transitions, 7313 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:33,281 INFO L231 Difference]: Finished difference. Result has 378 places, 486 transitions, 5996 flow [2024-06-27 19:52:33,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5380, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5996, PETRI_PLACES=378, PETRI_TRANSITIONS=486} [2024-06-27 19:52:33,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-27 19:52:33,282 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 486 transitions, 5996 flow [2024-06-27 19:52:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:33,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:33,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:33,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:52:33,283 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:33,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash -666410880, now seen corresponding path program 3 times [2024-06-27 19:52:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273492666] [2024-06-27 19:52:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273492666] [2024-06-27 19:52:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273492666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:34,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:34,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439848724] [2024-06-27 19:52:34,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:34,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:34,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:34,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 486 transitions, 5996 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:34,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:34,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:34,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:36,066 INFO L124 PetriNetUnfolderBase]: 4247/6845 cut-off events. [2024-06-27 19:52:36,066 INFO L125 PetriNetUnfolderBase]: For 1781940/1781947 co-relation queries the response was YES. [2024-06-27 19:52:36,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77111 conditions, 6845 events. 4247/6845 cut-off events. For 1781940/1781947 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43277 event pairs, 817 based on Foata normal form. 7/6850 useless extension candidates. Maximal degree in co-relation 76930. Up to 6432 conditions per place. [2024-06-27 19:52:36,183 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 454 selfloop transitions, 50 changer transitions 0/509 dead transitions. [2024-06-27 19:52:36,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 509 transitions, 7534 flow [2024-06-27 19:52:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 19:52:36,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 19:52:36,184 INFO L175 Difference]: Start difference. First operand has 378 places, 486 transitions, 5996 flow. Second operand 8 states and 146 transitions. [2024-06-27 19:52:36,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 509 transitions, 7534 flow [2024-06-27 19:52:41,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 509 transitions, 7317 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-27 19:52:41,142 INFO L231 Difference]: Finished difference. Result has 383 places, 492 transitions, 6115 flow [2024-06-27 19:52:41,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6115, PETRI_PLACES=383, PETRI_TRANSITIONS=492} [2024-06-27 19:52:41,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-27 19:52:41,143 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 492 transitions, 6115 flow [2024-06-27 19:52:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:41,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:41,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:41,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:52:41,144 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:41,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1281032024, now seen corresponding path program 6 times [2024-06-27 19:52:41,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:41,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966070327] [2024-06-27 19:52:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:41,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:42,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:42,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966070327] [2024-06-27 19:52:42,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966070327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:42,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334439438] [2024-06-27 19:52:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:42,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:42,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:42,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:42,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 492 transitions, 6115 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:42,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:42,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:42,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:43,866 INFO L124 PetriNetUnfolderBase]: 4244/6833 cut-off events. [2024-06-27 19:52:43,866 INFO L125 PetriNetUnfolderBase]: For 1796368/1796371 co-relation queries the response was YES. [2024-06-27 19:52:43,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77076 conditions, 6833 events. 4244/6833 cut-off events. For 1796368/1796371 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43070 event pairs, 829 based on Foata normal form. 3/6834 useless extension candidates. Maximal degree in co-relation 76893. Up to 6302 conditions per place. [2024-06-27 19:52:43,975 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 416 selfloop transitions, 88 changer transitions 0/509 dead transitions. [2024-06-27 19:52:43,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 509 transitions, 7685 flow [2024-06-27 19:52:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:52:43,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:52:43,976 INFO L175 Difference]: Start difference. First operand has 383 places, 492 transitions, 6115 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:52:43,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 509 transitions, 7685 flow [2024-06-27 19:52:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 509 transitions, 7425 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:49,411 INFO L231 Difference]: Finished difference. Result has 387 places, 492 transitions, 6037 flow [2024-06-27 19:52:49,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5855, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6037, PETRI_PLACES=387, PETRI_TRANSITIONS=492} [2024-06-27 19:52:49,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-27 19:52:49,412 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 492 transitions, 6037 flow [2024-06-27 19:52:49,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:49,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:49,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:52:49,412 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:49,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash 478213623, now seen corresponding path program 2 times [2024-06-27 19:52:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:49,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238182784] [2024-06-27 19:52:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238182784] [2024-06-27 19:52:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238182784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:50,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:50,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482975504] [2024-06-27 19:52:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:50,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:50,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:50,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 492 transitions, 6037 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:50,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:50,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:50,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:53,047 INFO L124 PetriNetUnfolderBase]: 4354/7020 cut-off events. [2024-06-27 19:52:53,047 INFO L125 PetriNetUnfolderBase]: For 1891848/1891851 co-relation queries the response was YES. [2024-06-27 19:52:53,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78862 conditions, 7020 events. 4354/7020 cut-off events. For 1891848/1891851 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44685 event pairs, 803 based on Foata normal form. 12/7028 useless extension candidates. Maximal degree in co-relation 78677. Up to 5796 conditions per place. [2024-06-27 19:52:53,163 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 398 selfloop transitions, 147 changer transitions 0/550 dead transitions. [2024-06-27 19:52:53,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 550 transitions, 7562 flow [2024-06-27 19:52:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:52:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:52:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 19:52:53,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-27 19:52:53,164 INFO L175 Difference]: Start difference. First operand has 387 places, 492 transitions, 6037 flow. Second operand 11 states and 221 transitions. [2024-06-27 19:52:53,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 550 transitions, 7562 flow [2024-06-27 19:52:57,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 550 transitions, 7321 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:57,114 INFO L231 Difference]: Finished difference. Result has 393 places, 504 transitions, 6342 flow [2024-06-27 19:52:57,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6342, PETRI_PLACES=393, PETRI_TRANSITIONS=504} [2024-06-27 19:52:57,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 19:52:57,114 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 504 transitions, 6342 flow [2024-06-27 19:52:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:57,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:57,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:57,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:52:57,115 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:57,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1104295565, now seen corresponding path program 3 times [2024-06-27 19:52:57,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:57,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18204693] [2024-06-27 19:52:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18204693] [2024-06-27 19:52:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18204693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:58,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:58,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:58,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827113676] [2024-06-27 19:52:58,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:58,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:58,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:58,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:52:58,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 504 transitions, 6342 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:58,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:58,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:52:58,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:00,913 INFO L124 PetriNetUnfolderBase]: 4579/7457 cut-off events. [2024-06-27 19:53:00,913 INFO L125 PetriNetUnfolderBase]: For 2022230/2022233 co-relation queries the response was YES. [2024-06-27 19:53:01,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84335 conditions, 7457 events. 4579/7457 cut-off events. For 2022230/2022233 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 48730 event pairs, 881 based on Foata normal form. 12/7465 useless extension candidates. Maximal degree in co-relation 84148. Up to 5293 conditions per place. [2024-06-27 19:53:01,047 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 392 selfloop transitions, 161 changer transitions 0/558 dead transitions. [2024-06-27 19:53:01,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 558 transitions, 8359 flow [2024-06-27 19:53:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 19:53:01,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-27 19:53:01,048 INFO L175 Difference]: Start difference. First operand has 393 places, 504 transitions, 6342 flow. Second operand 11 states and 223 transitions. [2024-06-27 19:53:01,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 558 transitions, 8359 flow [2024-06-27 19:53:06,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 558 transitions, 8045 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 19:53:06,874 INFO L231 Difference]: Finished difference. Result has 400 places, 509 transitions, 6656 flow [2024-06-27 19:53:06,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6032, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6656, PETRI_PLACES=400, PETRI_TRANSITIONS=509} [2024-06-27 19:53:06,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 19:53:06,874 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 509 transitions, 6656 flow [2024-06-27 19:53:06,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:06,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:06,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:53:06,875 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:06,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1793987813, now seen corresponding path program 4 times [2024-06-27 19:53:06,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:06,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672740287] [2024-06-27 19:53:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:06,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:08,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:08,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672740287] [2024-06-27 19:53:08,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672740287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:08,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:08,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:08,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79559002] [2024-06-27 19:53:08,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:08,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:08,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:53:08,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 509 transitions, 6656 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:08,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:08,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:53:08,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:10,464 INFO L124 PetriNetUnfolderBase]: 4620/7538 cut-off events. [2024-06-27 19:53:10,465 INFO L125 PetriNetUnfolderBase]: For 2050652/2050655 co-relation queries the response was YES. [2024-06-27 19:53:10,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84863 conditions, 7538 events. 4620/7538 cut-off events. For 2050652/2050655 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 49528 event pairs, 907 based on Foata normal form. 12/7546 useless extension candidates. Maximal degree in co-relation 84674. Up to 6254 conditions per place. [2024-06-27 19:53:10,601 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 408 selfloop transitions, 144 changer transitions 0/557 dead transitions. [2024-06-27 19:53:10,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 557 transitions, 8102 flow [2024-06-27 19:53:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 19:53:10,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 19:53:10,602 INFO L175 Difference]: Start difference. First operand has 400 places, 509 transitions, 6656 flow. Second operand 11 states and 222 transitions. [2024-06-27 19:53:10,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 557 transitions, 8102 flow [2024-06-27 19:53:17,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 557 transitions, 7825 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:17,439 INFO L231 Difference]: Finished difference. Result has 405 places, 511 transitions, 6799 flow [2024-06-27 19:53:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6391, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6799, PETRI_PLACES=405, PETRI_TRANSITIONS=511} [2024-06-27 19:53:17,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 19:53:17,440 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 511 transitions, 6799 flow [2024-06-27 19:53:17,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:17,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:17,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:17,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:53:17,440 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:17,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash -842835759, now seen corresponding path program 5 times [2024-06-27 19:53:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:17,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040938721] [2024-06-27 19:53:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040938721] [2024-06-27 19:53:18,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040938721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:18,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:18,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523536218] [2024-06-27 19:53:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:18,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:18,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:53:18,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 511 transitions, 6799 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:18,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:18,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:53:18,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:21,138 INFO L124 PetriNetUnfolderBase]: 4600/7506 cut-off events. [2024-06-27 19:53:21,138 INFO L125 PetriNetUnfolderBase]: For 1993843/1993846 co-relation queries the response was YES. [2024-06-27 19:53:21,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83265 conditions, 7506 events. 4600/7506 cut-off events. For 1993843/1993846 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 49255 event pairs, 893 based on Foata normal form. 12/7514 useless extension candidates. Maximal degree in co-relation 83073. Up to 6130 conditions per place. [2024-06-27 19:53:21,274 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 413 selfloop transitions, 140 changer transitions 0/558 dead transitions. [2024-06-27 19:53:21,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 558 transitions, 8143 flow [2024-06-27 19:53:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 19:53:21,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-27 19:53:21,276 INFO L175 Difference]: Start difference. First operand has 405 places, 511 transitions, 6799 flow. Second operand 11 states and 223 transitions. [2024-06-27 19:53:21,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 558 transitions, 8143 flow [2024-06-27 19:53:25,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 558 transitions, 7756 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:25,479 INFO L231 Difference]: Finished difference. Result has 409 places, 511 transitions, 6698 flow [2024-06-27 19:53:25,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6412, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6698, PETRI_PLACES=409, PETRI_TRANSITIONS=511} [2024-06-27 19:53:25,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-27 19:53:25,480 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 511 transitions, 6698 flow [2024-06-27 19:53:25,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:25,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:25,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:53:25,480 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:25,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1010905076, now seen corresponding path program 1 times [2024-06-27 19:53:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429152958] [2024-06-27 19:53:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:26,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:26,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429152958] [2024-06-27 19:53:26,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429152958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:26,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:26,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:53:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082184741] [2024-06-27 19:53:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:26,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:53:26,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:53:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:53:26,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:53:26,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 511 transitions, 6698 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:26,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:26,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:53:26,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:28,560 INFO L124 PetriNetUnfolderBase]: 4210/7045 cut-off events. [2024-06-27 19:53:28,560 INFO L125 PetriNetUnfolderBase]: For 1976746/1976810 co-relation queries the response was YES. [2024-06-27 19:53:28,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79874 conditions, 7045 events. 4210/7045 cut-off events. For 1976746/1976810 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 47828 event pairs, 850 based on Foata normal form. 10/6959 useless extension candidates. Maximal degree in co-relation 79682. Up to 6075 conditions per place. [2024-06-27 19:53:28,690 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 403 selfloop transitions, 30 changer transitions 0/539 dead transitions. [2024-06-27 19:53:28,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 539 transitions, 7748 flow [2024-06-27 19:53:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:53:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:53:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:53:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:53:28,691 INFO L175 Difference]: Start difference. First operand has 409 places, 511 transitions, 6698 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:53:28,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 539 transitions, 7748 flow [2024-06-27 19:53:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 539 transitions, 7366 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 19:53:35,962 INFO L231 Difference]: Finished difference. Result has 408 places, 514 transitions, 6480 flow [2024-06-27 19:53:35,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6316, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6480, PETRI_PLACES=408, PETRI_TRANSITIONS=514} [2024-06-27 19:53:35,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-27 19:53:35,963 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 514 transitions, 6480 flow [2024-06-27 19:53:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:35,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:35,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:53:35,963 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:35,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -666415406, now seen corresponding path program 2 times [2024-06-27 19:53:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:35,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064355737] [2024-06-27 19:53:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:35,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064355737] [2024-06-27 19:53:37,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064355737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:37,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:37,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:53:37,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273496040] [2024-06-27 19:53:37,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:53:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:53:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:53:37,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:53:37,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 514 transitions, 6480 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:37,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:37,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:53:37,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:39,095 INFO L124 PetriNetUnfolderBase]: 4253/7103 cut-off events. [2024-06-27 19:53:39,095 INFO L125 PetriNetUnfolderBase]: For 2012691/2012803 co-relation queries the response was YES. [2024-06-27 19:53:39,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81090 conditions, 7103 events. 4253/7103 cut-off events. For 2012691/2012803 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48119 event pairs, 855 based on Foata normal form. 7/7013 useless extension candidates. Maximal degree in co-relation 80899. Up to 6079 conditions per place. [2024-06-27 19:53:39,229 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 391 selfloop transitions, 50 changer transitions 0/547 dead transitions. [2024-06-27 19:53:39,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 547 transitions, 8334 flow [2024-06-27 19:53:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:53:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:53:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:53:39,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:53:39,230 INFO L175 Difference]: Start difference. First operand has 408 places, 514 transitions, 6480 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:53:39,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 547 transitions, 8334 flow [2024-06-27 19:53:46,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 547 transitions, 8118 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:46,721 INFO L231 Difference]: Finished difference. Result has 411 places, 527 transitions, 6774 flow [2024-06-27 19:53:46,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6774, PETRI_PLACES=411, PETRI_TRANSITIONS=527} [2024-06-27 19:53:46,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-27 19:53:46,722 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 527 transitions, 6774 flow [2024-06-27 19:53:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:46,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:46,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:46,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:53:46,722 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:46,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1280605526, now seen corresponding path program 3 times [2024-06-27 19:53:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:46,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542722257] [2024-06-27 19:53:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:48,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:48,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542722257] [2024-06-27 19:53:48,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542722257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:48,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:48,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:53:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015152162] [2024-06-27 19:53:48,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:48,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:53:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:53:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:53:48,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:53:48,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 527 transitions, 6774 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:48,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:48,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:53:48,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:50,010 INFO L124 PetriNetUnfolderBase]: 4246/7101 cut-off events. [2024-06-27 19:53:50,010 INFO L125 PetriNetUnfolderBase]: For 2070891/2071033 co-relation queries the response was YES. [2024-06-27 19:53:50,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81469 conditions, 7101 events. 4246/7101 cut-off events. For 2070891/2071033 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 48261 event pairs, 856 based on Foata normal form. 17/7020 useless extension candidates. Maximal degree in co-relation 81276. Up to 6071 conditions per place. [2024-06-27 19:53:50,138 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 61 changer transitions 0/552 dead transitions. [2024-06-27 19:53:50,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 552 transitions, 8200 flow [2024-06-27 19:53:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:53:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:53:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:53:50,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:53:50,139 INFO L175 Difference]: Start difference. First operand has 411 places, 527 transitions, 6774 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:53:50,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 552 transitions, 8200 flow [2024-06-27 19:53:57,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 552 transitions, 7982 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-27 19:53:57,945 INFO L231 Difference]: Finished difference. Result has 416 places, 533 transitions, 6897 flow [2024-06-27 19:53:57,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6897, PETRI_PLACES=416, PETRI_TRANSITIONS=533} [2024-06-27 19:53:57,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-27 19:53:57,945 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 533 transitions, 6897 flow [2024-06-27 19:53:57,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:57,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:57,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:57,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:53:57,946 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:57,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1281023096, now seen corresponding path program 4 times [2024-06-27 19:53:57,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:57,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352308407] [2024-06-27 19:53:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352308407] [2024-06-27 19:53:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352308407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:59,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:53:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908402442] [2024-06-27 19:53:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:53:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:53:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:53:59,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:53:59,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 533 transitions, 6897 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:59,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:59,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:53:59,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:01,043 INFO L124 PetriNetUnfolderBase]: 4242/7094 cut-off events. [2024-06-27 19:54:01,043 INFO L125 PetriNetUnfolderBase]: For 2068077/2068193 co-relation queries the response was YES. [2024-06-27 19:54:01,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81721 conditions, 7094 events. 4242/7094 cut-off events. For 2068077/2068193 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 48186 event pairs, 855 based on Foata normal form. 7/7004 useless extension candidates. Maximal degree in co-relation 81526. Up to 6117 conditions per place. [2024-06-27 19:54:01,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 411 selfloop transitions, 35 changer transitions 0/552 dead transitions. [2024-06-27 19:54:01,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 552 transitions, 7856 flow [2024-06-27 19:54:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:54:01,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:54:01,168 INFO L175 Difference]: Start difference. First operand has 416 places, 533 transitions, 6897 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:54:01,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 552 transitions, 7856 flow [2024-06-27 19:54:08,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 552 transitions, 7622 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:08,245 INFO L231 Difference]: Finished difference. Result has 420 places, 534 transitions, 6752 flow [2024-06-27 19:54:08,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6669, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6752, PETRI_PLACES=420, PETRI_TRANSITIONS=534} [2024-06-27 19:54:08,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-27 19:54:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 534 transitions, 6752 flow [2024-06-27 19:54:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:08,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:08,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:54:08,246 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:08,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash -838932198, now seen corresponding path program 7 times [2024-06-27 19:54:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408019559] [2024-06-27 19:54:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:08,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:08,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408019559] [2024-06-27 19:54:08,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408019559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:08,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:08,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:08,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036527891] [2024-06-27 19:54:08,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:08,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:08,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:09,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:09,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 534 transitions, 6752 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:09,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:09,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:09,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:11,140 INFO L124 PetriNetUnfolderBase]: 4673/7622 cut-off events. [2024-06-27 19:54:11,141 INFO L125 PetriNetUnfolderBase]: For 2070927/2070930 co-relation queries the response was YES. [2024-06-27 19:54:11,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85308 conditions, 7622 events. 4673/7622 cut-off events. For 2070927/2070930 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 50131 event pairs, 937 based on Foata normal form. 3/7619 useless extension candidates. Maximal degree in co-relation 85111. Up to 7074 conditions per place. [2024-06-27 19:54:11,273 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 492 selfloop transitions, 58 changer transitions 0/555 dead transitions. [2024-06-27 19:54:11,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 555 transitions, 7949 flow [2024-06-27 19:54:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 19:54:11,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:54:11,274 INFO L175 Difference]: Start difference. First operand has 420 places, 534 transitions, 6752 flow. Second operand 8 states and 148 transitions. [2024-06-27 19:54:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 555 transitions, 7949 flow [2024-06-27 19:54:17,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 555 transitions, 7785 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:17,621 INFO L231 Difference]: Finished difference. Result has 421 places, 535 transitions, 6745 flow [2024-06-27 19:54:17,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6745, PETRI_PLACES=421, PETRI_TRANSITIONS=535} [2024-06-27 19:54:17,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-27 19:54:17,621 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 535 transitions, 6745 flow [2024-06-27 19:54:17,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:17,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:17,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:17,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:54:17,622 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:17,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash -462225023, now seen corresponding path program 4 times [2024-06-27 19:54:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:17,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870174822] [2024-06-27 19:54:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:17,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870174822] [2024-06-27 19:54:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870174822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:18,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:18,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116470296] [2024-06-27 19:54:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:18,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:18,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:18,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:18,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 535 transitions, 6745 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:18,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:18,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:18,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:21,069 INFO L124 PetriNetUnfolderBase]: 4683/7638 cut-off events. [2024-06-27 19:54:21,069 INFO L125 PetriNetUnfolderBase]: For 2109524/2109533 co-relation queries the response was YES. [2024-06-27 19:54:21,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85745 conditions, 7638 events. 4683/7638 cut-off events. For 2109524/2109533 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 50252 event pairs, 932 based on Foata normal form. 8/7643 useless extension candidates. Maximal degree in co-relation 85547. Up to 7139 conditions per place. [2024-06-27 19:54:21,196 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 519 selfloop transitions, 37 changer transitions 0/561 dead transitions. [2024-06-27 19:54:21,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 561 transitions, 8055 flow [2024-06-27 19:54:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:54:21,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:54:21,197 INFO L175 Difference]: Start difference. First operand has 421 places, 535 transitions, 6745 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:54:21,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 561 transitions, 8055 flow [2024-06-27 19:54:25,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 561 transitions, 7931 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:25,991 INFO L231 Difference]: Finished difference. Result has 423 places, 538 transitions, 6813 flow [2024-06-27 19:54:25,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6813, PETRI_PLACES=423, PETRI_TRANSITIONS=538} [2024-06-27 19:54:25,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-27 19:54:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 538 transitions, 6813 flow [2024-06-27 19:54:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:54:25,992 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:25,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -462075293, now seen corresponding path program 5 times [2024-06-27 19:54:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180211937] [2024-06-27 19:54:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:26,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:26,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180211937] [2024-06-27 19:54:26,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180211937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:26,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:26,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:26,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942400726] [2024-06-27 19:54:26,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:26,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:26,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:26,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:26,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 538 transitions, 6813 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:26,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:26,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:26,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:29,683 INFO L124 PetriNetUnfolderBase]: 4693/7664 cut-off events. [2024-06-27 19:54:29,683 INFO L125 PetriNetUnfolderBase]: For 2139742/2139751 co-relation queries the response was YES. [2024-06-27 19:54:29,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86138 conditions, 7664 events. 4693/7664 cut-off events. For 2139742/2139751 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50534 event pairs, 942 based on Foata normal form. 8/7669 useless extension candidates. Maximal degree in co-relation 85939. Up to 7133 conditions per place. [2024-06-27 19:54:29,813 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 514 selfloop transitions, 44 changer transitions 0/563 dead transitions. [2024-06-27 19:54:29,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 563 transitions, 8423 flow [2024-06-27 19:54:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:54:29,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:54:29,814 INFO L175 Difference]: Start difference. First operand has 423 places, 538 transitions, 6813 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:54:29,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 563 transitions, 8423 flow [2024-06-27 19:54:35,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 563 transitions, 8255 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:35,398 INFO L231 Difference]: Finished difference. Result has 425 places, 541 transitions, 6851 flow [2024-06-27 19:54:35,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6851, PETRI_PLACES=425, PETRI_TRANSITIONS=541} [2024-06-27 19:54:35,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-27 19:54:35,398 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 541 transitions, 6851 flow [2024-06-27 19:54:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:35,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:35,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:54:35,399 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:35,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash -462075510, now seen corresponding path program 8 times [2024-06-27 19:54:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:35,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405228961] [2024-06-27 19:54:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:36,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:36,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405228961] [2024-06-27 19:54:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405228961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:36,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2399645] [2024-06-27 19:54:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:36,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:36,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 541 transitions, 6851 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:36,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:36,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:36,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:38,836 INFO L124 PetriNetUnfolderBase]: 4690/7650 cut-off events. [2024-06-27 19:54:38,836 INFO L125 PetriNetUnfolderBase]: For 2146791/2146794 co-relation queries the response was YES. [2024-06-27 19:54:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86000 conditions, 7650 events. 4690/7650 cut-off events. For 2146791/2146794 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 50251 event pairs, 939 based on Foata normal form. 3/7647 useless extension candidates. Maximal degree in co-relation 85800. Up to 7090 conditions per place. [2024-06-27 19:54:39,120 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 492 selfloop transitions, 62 changer transitions 0/559 dead transitions. [2024-06-27 19:54:39,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 559 transitions, 8043 flow [2024-06-27 19:54:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:54:39,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:54:39,121 INFO L175 Difference]: Start difference. First operand has 425 places, 541 transitions, 6851 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:54:39,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 559 transitions, 8043 flow [2024-06-27 19:54:47,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 559 transitions, 7741 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:47,023 INFO L231 Difference]: Finished difference. Result has 427 places, 542 transitions, 6711 flow [2024-06-27 19:54:47,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6571, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6711, PETRI_PLACES=427, PETRI_TRANSITIONS=542} [2024-06-27 19:54:47,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-27 19:54:47,024 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 542 transitions, 6711 flow [2024-06-27 19:54:47,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:47,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:47,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:47,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:54:47,024 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:47,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash -462075076, now seen corresponding path program 4 times [2024-06-27 19:54:47,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:47,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754361769] [2024-06-27 19:54:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:47,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754361769] [2024-06-27 19:54:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754361769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249550873] [2024-06-27 19:54:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:48,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 542 transitions, 6711 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:48,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:48,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:48,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:50,515 INFO L124 PetriNetUnfolderBase]: 4687/7654 cut-off events. [2024-06-27 19:54:50,515 INFO L125 PetriNetUnfolderBase]: For 2162598/2162607 co-relation queries the response was YES. [2024-06-27 19:54:50,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85797 conditions, 7654 events. 4687/7654 cut-off events. For 2162598/2162607 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 50444 event pairs, 940 based on Foata normal form. 7/7658 useless extension candidates. Maximal degree in co-relation 85596. Up to 7187 conditions per place. [2024-06-27 19:54:50,643 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 524 selfloop transitions, 31 changer transitions 0/560 dead transitions. [2024-06-27 19:54:50,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 560 transitions, 7881 flow [2024-06-27 19:54:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:54:50,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 19:54:50,644 INFO L175 Difference]: Start difference. First operand has 427 places, 542 transitions, 6711 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:54:50,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 560 transitions, 7881 flow [2024-06-27 19:54:57,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 560 transitions, 7695 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:57,036 INFO L231 Difference]: Finished difference. Result has 429 places, 542 transitions, 6593 flow [2024-06-27 19:54:57,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6525, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6593, PETRI_PLACES=429, PETRI_TRANSITIONS=542} [2024-06-27 19:54:57,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-27 19:54:57,037 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 542 transitions, 6593 flow [2024-06-27 19:54:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:57,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:57,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:57,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:54:57,038 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:57,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -205724513, now seen corresponding path program 6 times [2024-06-27 19:54:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668859552] [2024-06-27 19:54:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:57,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:57,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668859552] [2024-06-27 19:54:57,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668859552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:57,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512338157] [2024-06-27 19:54:57,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:57,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:57,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:57,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:57,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 542 transitions, 6593 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:57,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:57,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:00,482 INFO L124 PetriNetUnfolderBase]: 4681/7645 cut-off events. [2024-06-27 19:55:00,482 INFO L125 PetriNetUnfolderBase]: For 2179732/2179741 co-relation queries the response was YES. [2024-06-27 19:55:00,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85431 conditions, 7645 events. 4681/7645 cut-off events. For 2179732/2179741 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 50399 event pairs, 939 based on Foata normal form. 8/7650 useless extension candidates. Maximal degree in co-relation 85229. Up to 7137 conditions per place. [2024-06-27 19:55:00,602 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 520 selfloop transitions, 39 changer transitions 0/564 dead transitions. [2024-06-27 19:55:00,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 564 transitions, 7797 flow [2024-06-27 19:55:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 19:55:00,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:55:00,603 INFO L175 Difference]: Start difference. First operand has 429 places, 542 transitions, 6593 flow. Second operand 8 states and 148 transitions. [2024-06-27 19:55:00,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 564 transitions, 7797 flow [2024-06-27 19:55:06,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 564 transitions, 7617 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:06,184 INFO L231 Difference]: Finished difference. Result has 430 places, 542 transitions, 6497 flow [2024-06-27 19:55:06,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6413, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6497, PETRI_PLACES=430, PETRI_TRANSITIONS=542} [2024-06-27 19:55:06,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-27 19:55:06,185 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 542 transitions, 6497 flow [2024-06-27 19:55:06,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:06,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:06,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:55:06,185 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:06,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash -192392033, now seen corresponding path program 7 times [2024-06-27 19:55:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923139657] [2024-06-27 19:55:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923139657] [2024-06-27 19:55:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923139657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:07,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:07,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:07,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13949069] [2024-06-27 19:55:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:07,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:07,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:07,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 542 transitions, 6497 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:07,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:07,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:07,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:09,611 INFO L124 PetriNetUnfolderBase]: 4691/7649 cut-off events. [2024-06-27 19:55:09,611 INFO L125 PetriNetUnfolderBase]: For 2208916/2208925 co-relation queries the response was YES. [2024-06-27 19:55:09,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85744 conditions, 7649 events. 4691/7649 cut-off events. For 2208916/2208925 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 50325 event pairs, 929 based on Foata normal form. 8/7654 useless extension candidates. Maximal degree in co-relation 85541. Up to 7125 conditions per place. [2024-06-27 19:55:09,742 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 510 selfloop transitions, 50 changer transitions 0/565 dead transitions. [2024-06-27 19:55:09,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 565 transitions, 7833 flow [2024-06-27 19:55:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:55:09,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:55:09,743 INFO L175 Difference]: Start difference. First operand has 430 places, 542 transitions, 6497 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:55:09,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 565 transitions, 7833 flow [2024-06-27 19:55:16,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 565 transitions, 7705 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:16,994 INFO L231 Difference]: Finished difference. Result has 429 places, 545 transitions, 6603 flow [2024-06-27 19:55:16,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6603, PETRI_PLACES=429, PETRI_TRANSITIONS=545} [2024-06-27 19:55:16,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-27 19:55:16,994 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 545 transitions, 6603 flow [2024-06-27 19:55:16,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:16,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:16,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:16,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:55:16,995 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:16,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash -48292966, now seen corresponding path program 5 times [2024-06-27 19:55:16,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:16,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061330377] [2024-06-27 19:55:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:16,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061330377] [2024-06-27 19:55:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061330377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612588167] [2024-06-27 19:55:17,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:18,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:18,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 545 transitions, 6603 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:18,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:18,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:18,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:20,473 INFO L124 PetriNetUnfolderBase]: 4704/7667 cut-off events. [2024-06-27 19:55:20,473 INFO L125 PetriNetUnfolderBase]: For 2243146/2243155 co-relation queries the response was YES. [2024-06-27 19:55:20,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86894 conditions, 7667 events. 4704/7667 cut-off events. For 2243146/2243155 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 50429 event pairs, 929 based on Foata normal form. 7/7671 useless extension candidates. Maximal degree in co-relation 86690. Up to 7187 conditions per place. [2024-06-27 19:55:20,604 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 515 selfloop transitions, 49 changer transitions 0/569 dead transitions. [2024-06-27 19:55:20,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 569 transitions, 8327 flow [2024-06-27 19:55:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:55:20,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 19:55:20,605 INFO L175 Difference]: Start difference. First operand has 429 places, 545 transitions, 6603 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:55:20,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 569 transitions, 8327 flow [2024-06-27 19:55:27,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 569 transitions, 8119 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:27,958 INFO L231 Difference]: Finished difference. Result has 432 places, 553 transitions, 6780 flow [2024-06-27 19:55:27,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6395, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6780, PETRI_PLACES=432, PETRI_TRANSITIONS=553} [2024-06-27 19:55:27,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-27 19:55:27,959 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 553 transitions, 6780 flow [2024-06-27 19:55:27,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:27,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:27,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:55:27,960 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:27,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1099870747, now seen corresponding path program 8 times [2024-06-27 19:55:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:27,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168383443] [2024-06-27 19:55:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168383443] [2024-06-27 19:55:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168383443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:29,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:29,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828737967] [2024-06-27 19:55:29,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:29,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:29,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 553 transitions, 6780 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:29,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:29,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:29,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:31,699 INFO L124 PetriNetUnfolderBase]: 4730/7705 cut-off events. [2024-06-27 19:55:31,699 INFO L125 PetriNetUnfolderBase]: For 2310546/2310555 co-relation queries the response was YES. [2024-06-27 19:55:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88152 conditions, 7705 events. 4730/7705 cut-off events. For 2310546/2310555 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 50733 event pairs, 927 based on Foata normal form. 8/7710 useless extension candidates. Maximal degree in co-relation 87946. Up to 7128 conditions per place. [2024-06-27 19:55:31,829 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 504 selfloop transitions, 69 changer transitions 0/578 dead transitions. [2024-06-27 19:55:31,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 578 transitions, 8582 flow [2024-06-27 19:55:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 19:55:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:55:31,830 INFO L175 Difference]: Start difference. First operand has 432 places, 553 transitions, 6780 flow. Second operand 8 states and 148 transitions. [2024-06-27 19:55:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 578 transitions, 8582 flow [2024-06-27 19:55:39,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 578 transitions, 8399 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:39,392 INFO L231 Difference]: Finished difference. Result has 436 places, 559 transitions, 7007 flow [2024-06-27 19:55:39,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7007, PETRI_PLACES=436, PETRI_TRANSITIONS=559} [2024-06-27 19:55:39,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-27 19:55:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 559 transitions, 7007 flow [2024-06-27 19:55:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:39,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:39,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:39,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:55:39,393 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:39,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1099870964, now seen corresponding path program 6 times [2024-06-27 19:55:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936885663] [2024-06-27 19:55:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:40,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:40,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936885663] [2024-06-27 19:55:40,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936885663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:40,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:40,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:40,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975061152] [2024-06-27 19:55:40,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:40,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:40,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:40,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:40,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:40,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:40,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 559 transitions, 7007 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:40,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:40,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:40,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:42,936 INFO L124 PetriNetUnfolderBase]: 4727/7701 cut-off events. [2024-06-27 19:55:42,936 INFO L125 PetriNetUnfolderBase]: For 2325105/2325114 co-relation queries the response was YES. [2024-06-27 19:55:43,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88715 conditions, 7701 events. 4727/7701 cut-off events. For 2325105/2325114 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50634 event pairs, 932 based on Foata normal form. 7/7705 useless extension candidates. Maximal degree in co-relation 88507. Up to 7232 conditions per place. [2024-06-27 19:55:43,062 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 531 selfloop transitions, 39 changer transitions 0/575 dead transitions. [2024-06-27 19:55:43,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 575 transitions, 8216 flow [2024-06-27 19:55:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 19:55:43,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 19:55:43,063 INFO L175 Difference]: Start difference. First operand has 436 places, 559 transitions, 7007 flow. Second operand 8 states and 141 transitions. [2024-06-27 19:55:43,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 575 transitions, 8216 flow [2024-06-27 19:55:50,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 575 transitions, 7923 flow, removed 112 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:50,632 INFO L231 Difference]: Finished difference. Result has 440 places, 560 transitions, 6821 flow [2024-06-27 19:55:50,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6821, PETRI_PLACES=440, PETRI_TRANSITIONS=560} [2024-06-27 19:55:50,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-27 19:55:50,632 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 560 transitions, 6821 flow [2024-06-27 19:55:50,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:50,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:50,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:50,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:55:50,633 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:50,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1099870530, now seen corresponding path program 9 times [2024-06-27 19:55:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527865107] [2024-06-27 19:55:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:50,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:51,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:51,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527865107] [2024-06-27 19:55:51,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527865107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:51,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:51,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:51,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398643379] [2024-06-27 19:55:51,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:51,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:51,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:51,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:51,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:51,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:51,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 560 transitions, 6821 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:51,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:51,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:51,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:54,206 INFO L124 PetriNetUnfolderBase]: 4732/7709 cut-off events. [2024-06-27 19:55:54,206 INFO L125 PetriNetUnfolderBase]: For 2351709/2351712 co-relation queries the response was YES. [2024-06-27 19:55:54,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88800 conditions, 7709 events. 4732/7709 cut-off events. For 2351709/2351712 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50702 event pairs, 939 based on Foata normal form. 3/7706 useless extension candidates. Maximal degree in co-relation 88590. Up to 7118 conditions per place. [2024-06-27 19:55:54,336 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 492 selfloop transitions, 80 changer transitions 0/577 dead transitions. [2024-06-27 19:55:54,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 577 transitions, 8139 flow [2024-06-27 19:55:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:55:54,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:55:54,337 INFO L175 Difference]: Start difference. First operand has 440 places, 560 transitions, 6821 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:55:54,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 577 transitions, 8139 flow [2024-06-27 19:56:02,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 577 transitions, 8049 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:02,086 INFO L231 Difference]: Finished difference. Result has 442 places, 563 transitions, 7035 flow [2024-06-27 19:56:02,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6731, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7035, PETRI_PLACES=442, PETRI_TRANSITIONS=563} [2024-06-27 19:56:02,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-27 19:56:02,086 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 563 transitions, 7035 flow [2024-06-27 19:56:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:02,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:02,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:02,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:56:02,087 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:02,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:02,087 INFO L85 PathProgramCache]: Analyzing trace with hash -48501503, now seen corresponding path program 9 times [2024-06-27 19:56:02,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530870099] [2024-06-27 19:56:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530870099] [2024-06-27 19:56:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530870099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:03,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:03,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:03,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842486509] [2024-06-27 19:56:03,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:03,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:03,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:03,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:03,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 563 transitions, 7035 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:03,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:03,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:03,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:05,687 INFO L124 PetriNetUnfolderBase]: 4726/7700 cut-off events. [2024-06-27 19:56:05,687 INFO L125 PetriNetUnfolderBase]: For 2371861/2371870 co-relation queries the response was YES. [2024-06-27 19:56:05,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89020 conditions, 7700 events. 4726/7700 cut-off events. For 2371861/2371870 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 50684 event pairs, 929 based on Foata normal form. 8/7705 useless extension candidates. Maximal degree in co-relation 88809. Up to 7126 conditions per place. [2024-06-27 19:56:05,814 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 506 selfloop transitions, 70 changer transitions 0/581 dead transitions. [2024-06-27 19:56:05,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 581 transitions, 8289 flow [2024-06-27 19:56:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:56:05,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:56:05,815 INFO L175 Difference]: Start difference. First operand has 442 places, 563 transitions, 7035 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:56:05,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 581 transitions, 8289 flow [2024-06-27 19:56:13,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 581 transitions, 7927 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:13,248 INFO L231 Difference]: Finished difference. Result has 444 places, 563 transitions, 6819 flow [2024-06-27 19:56:13,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6673, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6819, PETRI_PLACES=444, PETRI_TRANSITIONS=563} [2024-06-27 19:56:13,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-27 19:56:13,249 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 563 transitions, 6819 flow [2024-06-27 19:56:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:13,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:56:13,250 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1177144549, now seen corresponding path program 6 times [2024-06-27 19:56:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164248790] [2024-06-27 19:56:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:14,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:14,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164248790] [2024-06-27 19:56:14,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164248790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:14,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:56:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581018251] [2024-06-27 19:56:14,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:14,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:56:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:56:14,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:56:14,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:14,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 563 transitions, 6819 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:14,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:14,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:14,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:17,676 INFO L124 PetriNetUnfolderBase]: 4836/7899 cut-off events. [2024-06-27 19:56:17,676 INFO L125 PetriNetUnfolderBase]: For 2476451/2476451 co-relation queries the response was YES. [2024-06-27 19:56:17,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90636 conditions, 7899 events. 4836/7899 cut-off events. For 2476451/2476451 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 52373 event pairs, 939 based on Foata normal form. 12/7904 useless extension candidates. Maximal degree in co-relation 90424. Up to 6580 conditions per place. [2024-06-27 19:56:17,817 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 468 selfloop transitions, 142 changer transitions 0/615 dead transitions. [2024-06-27 19:56:17,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 615 transitions, 8466 flow [2024-06-27 19:56:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 19:56:17,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-27 19:56:17,818 INFO L175 Difference]: Start difference. First operand has 444 places, 563 transitions, 6819 flow. Second operand 11 states and 221 transitions. [2024-06-27 19:56:17,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 615 transitions, 8466 flow [2024-06-27 19:56:26,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 615 transitions, 8302 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:26,172 INFO L231 Difference]: Finished difference. Result has 450 places, 569 transitions, 7128 flow [2024-06-27 19:56:26,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7128, PETRI_PLACES=450, PETRI_TRANSITIONS=569} [2024-06-27 19:56:26,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-27 19:56:26,172 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 569 transitions, 7128 flow [2024-06-27 19:56:26,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:26,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:26,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:26,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:56:26,173 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:26,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash -540009865, now seen corresponding path program 7 times [2024-06-27 19:56:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:26,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800210371] [2024-06-27 19:56:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:27,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800210371] [2024-06-27 19:56:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800210371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:27,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:27,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:56:27,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621269627] [2024-06-27 19:56:27,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:27,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:56:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:56:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:56:27,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:27,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 569 transitions, 7128 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:27,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:27,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:27,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:30,620 INFO L124 PetriNetUnfolderBase]: 4959/8132 cut-off events. [2024-06-27 19:56:30,620 INFO L125 PetriNetUnfolderBase]: For 2530201/2530201 co-relation queries the response was YES. [2024-06-27 19:56:30,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93340 conditions, 8132 events. 4959/8132 cut-off events. For 2530201/2530201 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 54493 event pairs, 977 based on Foata normal form. 12/8137 useless extension candidates. Maximal degree in co-relation 93125. Up to 6701 conditions per place. [2024-06-27 19:56:30,758 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 468 selfloop transitions, 150 changer transitions 0/623 dead transitions. [2024-06-27 19:56:30,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 623 transitions, 8822 flow [2024-06-27 19:56:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 19:56:30,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-27 19:56:30,759 INFO L175 Difference]: Start difference. First operand has 450 places, 569 transitions, 7128 flow. Second operand 11 states and 218 transitions. [2024-06-27 19:56:30,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 623 transitions, 8822 flow