./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix010.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix010.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix010.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:53:50,403 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:53:50,466 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:53:50,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:53:50,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:53:50,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:53:50,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:53:50,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:53:50,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:53:50,504 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:53:50,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:53:50,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:53:50,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:53:50,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:53:50,507 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:53:50,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:53:50,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:53:50,507 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:53:50,507 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:53:50,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:53:50,508 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:53:50,508 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:53:50,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:53:50,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:53:50,509 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:53:50,509 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:53:50,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:53:50,509 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:53:50,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:53:50,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:53:50,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:53:50,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:53:50,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:53:50,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:53:50,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:53:50,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:53:50,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:53:50,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:53:50,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:53:50,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:53:50,512 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:53:50,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:53:50,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:53:50,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:53:50,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:53:50,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:53:50,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:53:50,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:53:50,738 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:53:50,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.oepc.i [2024-06-27 19:53:51,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:53:51,922 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:53:51,922 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.oepc.i [2024-06-27 19:53:51,939 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/936f0717f/31f8c55316b045338718d201a1fb5564/FLAG68e1ade8f [2024-06-27 19:53:51,951 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/936f0717f/31f8c55316b045338718d201a1fb5564 [2024-06-27 19:53:51,953 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:53:51,954 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:53:51,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix010.oepc.yml/witness.yml [2024-06-27 19:53:52,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:53:52,136 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:53:52,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:53:52,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:53:52,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:53:52,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:53:51" (1/2) ... [2024-06-27 19:53:52,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3f0077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:53:52, skipping insertion in model container [2024-06-27 19:53:52,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:53:51" (1/2) ... [2024-06-27 19:53:52,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35707c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:53:52, skipping insertion in model container [2024-06-27 19:53:52,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:53:52" (2/2) ... [2024-06-27 19:53:52,147 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3f0077 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52, skipping insertion in model container [2024-06-27 19:53:52,147 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:53:52" (2/2) ... [2024-06-27 19:53:52,147 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:53:52,218 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:53:52,219 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:53:52,219 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:53:52,220 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:53:52,220 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:53:52,220 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-27 19:53:52,259 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:53:52,537 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:53:52,547 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:53:52,635 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:53:52,663 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:53:52,663 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52 WrapperNode [2024-06-27 19:53:52,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:53:52,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:53:52,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:53:52,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:53:52,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,733 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 129 [2024-06-27 19:53:52,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:53:52,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:53:52,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:53:52,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:53:52,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,760 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,778 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 19:53:52,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,784 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:53:52,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:53:52,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:53:52,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:53:52,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (1/1) ... [2024-06-27 19:53:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:53:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:53:52,854 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 19:53:52,862 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 19:53:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:53:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:53:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:53:52,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:53:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:53:52,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:53:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:53:52,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:53:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:53:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:53:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:53:52,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:53:52,883 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 19:53:52,992 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:53:52,993 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:53:53,343 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:53:53,344 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:53:53,485 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:53:53,485 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:53:53,485 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:53:53 BoogieIcfgContainer [2024-06-27 19:53:53,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:53:53,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:53:53,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:53:53,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:53:53,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:53:51" (1/4) ... [2024-06-27 19:53:53,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b21ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:53:53, skipping insertion in model container [2024-06-27 19:53:53,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:53:52" (2/4) ... [2024-06-27 19:53:53,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b21ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:53:53, skipping insertion in model container [2024-06-27 19:53:53,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:53:52" (3/4) ... [2024-06-27 19:53:53,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b21ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:53:53, skipping insertion in model container [2024-06-27 19:53:53,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:53:53" (4/4) ... [2024-06-27 19:53:53,491 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.oepc.i [2024-06-27 19:53:53,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:53:53,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:53:53,504 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:53:53,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:53:53,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:53:53,577 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 19:53:53,577 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:53:53,579 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 4. Compared 71 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 19:53:53,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:53:53,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 19:53:53,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:53:53,592 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;@42e47724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:53:53,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:53:53,595 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:53:53,595 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 19:53:53,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:53:53,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:53,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:53:53,596 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 19:53:53,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 382731927, now seen corresponding path program 1 times [2024-06-27 19:53:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:53,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121218545] [2024-06-27 19:53:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:53,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:54,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121218545] [2024-06-27 19:53:54,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121218545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:54,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:54,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:53:54,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22615473] [2024-06-27 19:53:54,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:53:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:53:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:53:54,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:53:54,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:54,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:54,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:53:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:54,992 INFO L124 PetriNetUnfolderBase]: 1359/2139 cut-off events. [2024-06-27 19:53:54,993 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 19:53:54,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 2139 events. 1359/2139 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10850 event pairs, 941 based on Foata normal form. 1/2097 useless extension candidates. Maximal degree in co-relation 4241. Up to 2029 conditions per place. [2024-06-27 19:53:55,008 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 19:53:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 19:53:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:53:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:53:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 19:53:55,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 19:53:55,027 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 19:53:55,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 19:53:55,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:53:55,032 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 19:53:55,034 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 19:53:55,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 19:53:55,037 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 19:53:55,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:55,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:55,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:55,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:53:55,038 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 19:53:55,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1561535066, now seen corresponding path program 1 times [2024-06-27 19:53:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805620124] [2024-06-27 19:53:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:55,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:55,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805620124] [2024-06-27 19:53:55,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805620124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:55,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:55,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:53:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500364691] [2024-06-27 19:53:55,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:55,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:53:55,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:55,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:53:55,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:53:55,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:53:55,909 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 19:53:55,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:55,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:53:55,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:56,177 INFO L124 PetriNetUnfolderBase]: 1353/2136 cut-off events. [2024-06-27 19:53:56,177 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2024-06-27 19:53:56,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4792 conditions, 2136 events. 1353/2136 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10853 event pairs, 795 based on Foata normal form. 3/2132 useless extension candidates. Maximal degree in co-relation 4780. Up to 2005 conditions per place. [2024-06-27 19:53:56,186 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 19:53:56,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-27 19:53:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:53:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:53:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:53:56,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-27 19:53:56,188 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:53:56,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-27 19:53:56,190 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 19:53:56,191 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 19:53:56,191 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 19:53:56,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 19:53:56,192 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 19:53:56,192 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 19:53:56,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:56,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:56,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:53:56,193 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 19:53:56,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:56,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1691570235, now seen corresponding path program 1 times [2024-06-27 19:53:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:56,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271035182] [2024-06-27 19:53:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:56,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:57,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271035182] [2024-06-27 19:53:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271035182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:57,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:57,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:53:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347835346] [2024-06-27 19:53:57,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:53:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:53:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:53:57,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:53:57,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:57,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:57,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:53:57,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:58,162 INFO L124 PetriNetUnfolderBase]: 1641/2562 cut-off events. [2024-06-27 19:53:58,162 INFO L125 PetriNetUnfolderBase]: For 1353/1353 co-relation queries the response was YES. [2024-06-27 19:53:58,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 2562 events. 1641/2562 cut-off events. For 1353/1353 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12927 event pairs, 746 based on Foata normal form. 3/2555 useless extension candidates. Maximal degree in co-relation 6331. Up to 2393 conditions per place. [2024-06-27 19:53:58,191 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-27 19:53:58,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 376 flow [2024-06-27 19:53:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:53:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:53:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:53:58,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-27 19:53:58,194 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:53:58,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 376 flow [2024-06-27 19:53:58,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:53:58,197 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 19:53:58,197 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=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 19:53:58,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-27 19:53:58,198 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 19:53:58,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:58,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:58,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:53:58,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:58,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash 819869989, now seen corresponding path program 1 times [2024-06-27 19:53:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:58,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322339143] [2024-06-27 19:53:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:58,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:59,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:59,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322339143] [2024-06-27 19:53:59,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322339143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:59,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:59,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:53:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165487163] [2024-06-27 19:53:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:53:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:53:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:53:59,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:53:59,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 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 19:53:59,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:59,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:53:59,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:00,364 INFO L124 PetriNetUnfolderBase]: 1632/2543 cut-off events. [2024-06-27 19:54:00,364 INFO L125 PetriNetUnfolderBase]: For 2668/2668 co-relation queries the response was YES. [2024-06-27 19:54:00,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7020 conditions, 2543 events. 1632/2543 cut-off events. For 2668/2668 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12833 event pairs, 582 based on Foata normal form. 6/2537 useless extension candidates. Maximal degree in co-relation 7004. Up to 2348 conditions per place. [2024-06-27 19:54:00,376 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-27 19:54:00,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 436 flow [2024-06-27 19:54:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:54:00,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548172757475083 [2024-06-27 19:54:00,378 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:54:00,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 436 flow [2024-06-27 19:54:00,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:00,382 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-27 19:54:00,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 19:54:00,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-27 19:54:00,383 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-27 19:54:00,383 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 19:54:00,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:00,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:54:00,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:00,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 40153126, now seen corresponding path program 1 times [2024-06-27 19:54:00,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:00,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080669696] [2024-06-27 19:54:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:00,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:00,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080669696] [2024-06-27 19:54:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080669696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:00,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:00,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:54:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752497818] [2024-06-27 19:54:00,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:00,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:54:00,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:54:00,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:54:00,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:00,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:00,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:00,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:00,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:01,326 INFO L124 PetriNetUnfolderBase]: 1627/2536 cut-off events. [2024-06-27 19:54:01,327 INFO L125 PetriNetUnfolderBase]: For 4003/4003 co-relation queries the response was YES. [2024-06-27 19:54:01,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7444 conditions, 2536 events. 1627/2536 cut-off events. For 4003/4003 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12762 event pairs, 689 based on Foata normal form. 2/2526 useless extension candidates. Maximal degree in co-relation 7426. Up to 2407 conditions per place. [2024-06-27 19:54:01,341 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 19:54:01,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 373 flow [2024-06-27 19:54:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:54:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:54:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 19:54:01,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 19:54:01,343 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 101 transitions. [2024-06-27 19:54:01,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 373 flow [2024-06-27 19:54:01,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 334 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:01,346 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-27 19:54:01,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 19:54:01,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-27 19:54:01,347 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-27 19:54:01,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:01,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:01,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:01,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:54:01,348 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 19:54:01,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1244748280, now seen corresponding path program 1 times [2024-06-27 19:54:01,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:01,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799410932] [2024-06-27 19:54:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:01,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:01,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:01,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799410932] [2024-06-27 19:54:01,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799410932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:01,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:01,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:54:01,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950523606] [2024-06-27 19:54:01,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:01,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:54:01,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:54:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:54:02,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:02,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 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 19:54:02,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:02,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:02,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:02,556 INFO L124 PetriNetUnfolderBase]: 1918/2984 cut-off events. [2024-06-27 19:54:02,557 INFO L125 PetriNetUnfolderBase]: For 6278/6278 co-relation queries the response was YES. [2024-06-27 19:54:02,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 2984 events. 1918/2984 cut-off events. For 6278/6278 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14898 event pairs, 825 based on Foata normal form. 2/2986 useless extension candidates. Maximal degree in co-relation 9197. Up to 2819 conditions per place. [2024-06-27 19:54:02,580 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-27 19:54:02,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 410 flow [2024-06-27 19:54:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:54:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:54:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 19:54:02,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:54:02,581 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 114 transitions. [2024-06-27 19:54:02,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 410 flow [2024-06-27 19:54:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 388 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:02,586 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-27 19:54:02,587 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 19:54:02,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 19:54:02,589 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-27 19:54:02,589 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 19:54:02,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:02,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:54:02,590 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 19:54:02,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash -34881571, now seen corresponding path program 1 times [2024-06-27 19:54:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:02,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575257661] [2024-06-27 19:54:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:02,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:03,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:03,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575257661] [2024-06-27 19:54:03,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575257661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:03,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:03,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:54:03,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609211046] [2024-06-27 19:54:03,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:03,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:54:03,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:03,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:54:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:54:03,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:03,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:03,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:03,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:03,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:03,819 INFO L124 PetriNetUnfolderBase]: 1814/2880 cut-off events. [2024-06-27 19:54:03,820 INFO L125 PetriNetUnfolderBase]: For 8574/8578 co-relation queries the response was YES. [2024-06-27 19:54:03,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9536 conditions, 2880 events. 1814/2880 cut-off events. For 8574/8578 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14820 event pairs, 746 based on Foata normal form. 6/2886 useless extension candidates. Maximal degree in co-relation 9515. Up to 2635 conditions per place. [2024-06-27 19:54:03,833 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-27 19:54:03,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 522 flow [2024-06-27 19:54:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:54:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:54:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 19:54:03,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:54:03,835 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 126 transitions. [2024-06-27 19:54:03,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 522 flow [2024-06-27 19:54:03,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 490 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:54:03,839 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-27 19:54:03,839 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 19:54:03,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 19:54:03,841 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-27 19:54:03,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:03,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:03,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:54:03,841 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 19:54:03,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash 5889629, now seen corresponding path program 2 times [2024-06-27 19:54:03,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:03,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606003327] [2024-06-27 19:54:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:04,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:04,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606003327] [2024-06-27 19:54:04,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606003327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:04,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:04,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:54:04,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317774658] [2024-06-27 19:54:04,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:54:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:54:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:54:04,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:04,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:04,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:04,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:04,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:05,002 INFO L124 PetriNetUnfolderBase]: 1809/2872 cut-off events. [2024-06-27 19:54:05,002 INFO L125 PetriNetUnfolderBase]: For 11074/11074 co-relation queries the response was YES. [2024-06-27 19:54:05,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10147 conditions, 2872 events. 1809/2872 cut-off events. For 11074/11074 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14786 event pairs, 742 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 10125. Up to 2654 conditions per place. [2024-06-27 19:54:05,013 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 19:54:05,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 490 flow [2024-06-27 19:54:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:54:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:54:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:54:05,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:54:05,015 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:54:05,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 490 flow [2024-06-27 19:54:05,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 452 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 19:54:05,021 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 310 flow [2024-06-27 19:54:05,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 19:54:05,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-27 19:54:05,022 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 310 flow [2024-06-27 19:54:05,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:05,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:05,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:05,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:54:05,023 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 19:54:05,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1151540141, now seen corresponding path program 1 times [2024-06-27 19:54:05,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:05,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600813249] [2024-06-27 19:54:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:05,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:05,675 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 19:54:05,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:05,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600813249] [2024-06-27 19:54:05,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600813249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:05,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:05,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501825897] [2024-06-27 19:54:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 310 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 19:54:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:06,306 INFO L124 PetriNetUnfolderBase]: 1914/2959 cut-off events. [2024-06-27 19:54:06,306 INFO L125 PetriNetUnfolderBase]: For 12932/12932 co-relation queries the response was YES. [2024-06-27 19:54:06,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10591 conditions, 2959 events. 1914/2959 cut-off events. For 12932/12932 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14712 event pairs, 771 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 10567. Up to 2796 conditions per place. [2024-06-27 19:54:06,321 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-06-27 19:54:06,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 540 flow [2024-06-27 19:54:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:54:06,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 19:54:06,322 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 310 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:54:06,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 540 flow [2024-06-27 19:54:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 506 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:06,329 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-27 19:54:06,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 19:54:06,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-27 19:54:06,330 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-27 19:54:06,330 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 19:54:06,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:06,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:06,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:54:06,330 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 19:54:06,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:06,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1910825921, now seen corresponding path program 1 times [2024-06-27 19:54:06,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:06,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179524042] [2024-06-27 19:54:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:06,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:07,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179524042] [2024-06-27 19:54:07,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179524042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:07,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:07,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678791167] [2024-06-27 19:54:07,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:07,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:07,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:07,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:07,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:07,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:07,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:07,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:07,869 INFO L124 PetriNetUnfolderBase]: 1810/2859 cut-off events. [2024-06-27 19:54:07,869 INFO L125 PetriNetUnfolderBase]: For 15856/15856 co-relation queries the response was YES. [2024-06-27 19:54:07,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 2859 events. 1810/2859 cut-off events. For 15856/15856 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14686 event pairs, 703 based on Foata normal form. 2/2861 useless extension candidates. Maximal degree in co-relation 10861. Up to 2635 conditions per place. [2024-06-27 19:54:07,921 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-27 19:54:07,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 602 flow [2024-06-27 19:54:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:54:07,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 19:54:07,923 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:54:07,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 602 flow [2024-06-27 19:54:07,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 558 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:07,929 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 370 flow [2024-06-27 19:54:07,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 19:54:07,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-27 19:54:07,932 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 370 flow [2024-06-27 19:54:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:07,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:07,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:07,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:54:07,933 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 19:54:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:07,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1910821271, now seen corresponding path program 2 times [2024-06-27 19:54:07,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:07,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38001733] [2024-06-27 19:54:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38001733] [2024-06-27 19:54:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38001733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:08,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959389723] [2024-06-27 19:54:08,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:08,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:08,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:08,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 370 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:08,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:08,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:08,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:09,285 INFO L124 PetriNetUnfolderBase]: 1821/2876 cut-off events. [2024-06-27 19:54:09,286 INFO L125 PetriNetUnfolderBase]: For 19311/19315 co-relation queries the response was YES. [2024-06-27 19:54:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11547 conditions, 2876 events. 1821/2876 cut-off events. For 19311/19315 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14736 event pairs, 707 based on Foata normal form. 6/2882 useless extension candidates. Maximal degree in co-relation 11522. Up to 2604 conditions per place. [2024-06-27 19:54:09,300 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-27 19:54:09,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 714 flow [2024-06-27 19:54:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 19:54:09,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-27 19:54:09,302 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 370 flow. Second operand 7 states and 146 transitions. [2024-06-27 19:54:09,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 714 flow [2024-06-27 19:54:09,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 668 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:09,310 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 458 flow [2024-06-27 19:54:09,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=458, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-27 19:54:09,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-27 19:54:09,310 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 458 flow [2024-06-27 19:54:09,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:09,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:09,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:09,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:54:09,311 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 19:54:09,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1081327327, now seen corresponding path program 1 times [2024-06-27 19:54:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:09,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417808384] [2024-06-27 19:54:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:09,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417808384] [2024-06-27 19:54:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417808384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:10,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:10,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396578454] [2024-06-27 19:54:10,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:10,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:10,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 458 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 19:54:10,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:10,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:10,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:10,624 INFO L124 PetriNetUnfolderBase]: 1947/3037 cut-off events. [2024-06-27 19:54:10,624 INFO L125 PetriNetUnfolderBase]: For 23072/23076 co-relation queries the response was YES. [2024-06-27 19:54:10,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12680 conditions, 3037 events. 1947/3037 cut-off events. For 23072/23076 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15251 event pairs, 758 based on Foata normal form. 6/3043 useless extension candidates. Maximal degree in co-relation 12654. Up to 2804 conditions per place. [2024-06-27 19:54:10,638 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-06-27 19:54:10,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 814 flow [2024-06-27 19:54:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:54:10,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:54:10,640 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 458 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:54:10,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 814 flow [2024-06-27 19:54:10,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 770 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:10,652 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 534 flow [2024-06-27 19:54:10,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-27 19:54:10,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-27 19:54:10,653 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 534 flow [2024-06-27 19:54:10,653 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 19:54:10,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:10,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:54:10,654 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 19:54:10,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1710215435, now seen corresponding path program 2 times [2024-06-27 19:54:10,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:10,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567367535] [2024-06-27 19:54:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:10,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:11,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:11,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567367535] [2024-06-27 19:54:11,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567367535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:11,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:11,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852631347] [2024-06-27 19:54:11,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:11,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:11,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:11,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:11,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 534 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 19:54:11,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:11,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:11,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:11,974 INFO L124 PetriNetUnfolderBase]: 1958/3051 cut-off events. [2024-06-27 19:54:11,975 INFO L125 PetriNetUnfolderBase]: For 27017/27017 co-relation queries the response was YES. [2024-06-27 19:54:11,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13417 conditions, 3051 events. 1958/3051 cut-off events. For 27017/27017 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15283 event pairs, 750 based on Foata normal form. 2/3053 useless extension candidates. Maximal degree in co-relation 13389. Up to 2869 conditions per place. [2024-06-27 19:54:11,989 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-27 19:54:11,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 806 flow [2024-06-27 19:54:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:54:11,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 19:54:11,990 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 534 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:54:11,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 806 flow [2024-06-27 19:54:12,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 768 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:12,007 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 574 flow [2024-06-27 19:54:12,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-27 19:54:12,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-27 19:54:12,008 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 574 flow [2024-06-27 19:54:12,008 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 19:54:12,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:12,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:12,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:54:12,008 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 19:54:12,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2092979777, now seen corresponding path program 3 times [2024-06-27 19:54:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:12,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044708837] [2024-06-27 19:54:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044708837] [2024-06-27 19:54:12,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044708837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:12,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:12,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152409156] [2024-06-27 19:54:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:12,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:12,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 574 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:12,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:12,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:12,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:13,341 INFO L124 PetriNetUnfolderBase]: 1844/2935 cut-off events. [2024-06-27 19:54:13,341 INFO L125 PetriNetUnfolderBase]: For 30193/30193 co-relation queries the response was YES. [2024-06-27 19:54:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13212 conditions, 2935 events. 1844/2935 cut-off events. For 30193/30193 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15134 event pairs, 697 based on Foata normal form. 2/2937 useless extension candidates. Maximal degree in co-relation 13182. Up to 2683 conditions per place. [2024-06-27 19:54:13,355 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 75 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-27 19:54:13,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 800 flow [2024-06-27 19:54:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:54:13,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:54:13,356 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 574 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:54:13,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 800 flow [2024-06-27 19:54:13,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 732 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:13,375 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 542 flow [2024-06-27 19:54:13,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-27 19:54:13,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-27 19:54:13,375 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 542 flow [2024-06-27 19:54:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:13,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:13,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:13,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:54:13,376 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 19:54:13,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1337761361, now seen corresponding path program 3 times [2024-06-27 19:54:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:13,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055394683] [2024-06-27 19:54:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:13,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:14,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:14,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055394683] [2024-06-27 19:54:14,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055394683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:14,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:14,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:54:14,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524013950] [2024-06-27 19:54:14,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:14,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:54:14,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:14,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:54:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:54:14,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:14,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 542 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 19:54:14,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:14,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:14,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:14,585 INFO L124 PetriNetUnfolderBase]: 1948/3037 cut-off events. [2024-06-27 19:54:14,585 INFO L125 PetriNetUnfolderBase]: For 33301/33301 co-relation queries the response was YES. [2024-06-27 19:54:14,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13835 conditions, 3037 events. 1948/3037 cut-off events. For 33301/33301 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15231 event pairs, 750 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 13804. Up to 2837 conditions per place. [2024-06-27 19:54:14,600 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 75 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-27 19:54:14,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 778 flow [2024-06-27 19:54:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:54:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:54:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:54:14,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:54:14,601 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 542 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:54:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 778 flow [2024-06-27 19:54:14,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 718 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:14,622 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 528 flow [2024-06-27 19:54:14,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-27 19:54:14,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-27 19:54:14,622 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 528 flow [2024-06-27 19:54:14,623 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 19:54:14,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:14,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:54:14,623 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 19:54:14,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1358766179, now seen corresponding path program 1 times [2024-06-27 19:54:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371213426] [2024-06-27 19:54:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:15,111 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 19:54:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371213426] [2024-06-27 19:54:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371213426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:15,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:54:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22406286] [2024-06-27 19:54:15,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:15,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:54:15,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:54:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:54:15,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:15,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:15,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:15,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:15,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:15,621 INFO L124 PetriNetUnfolderBase]: 2285/3504 cut-off events. [2024-06-27 19:54:15,621 INFO L125 PetriNetUnfolderBase]: For 48038/48038 co-relation queries the response was YES. [2024-06-27 19:54:15,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16635 conditions, 3504 events. 2285/3504 cut-off events. For 48038/48038 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17473 event pairs, 997 based on Foata normal form. 1/3505 useless extension candidates. Maximal degree in co-relation 16603. Up to 3360 conditions per place. [2024-06-27 19:54:15,641 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 68 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-27 19:54:15,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 722 flow [2024-06-27 19:54:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:54:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:54:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 19:54:15,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 19:54:15,649 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 528 flow. Second operand 5 states and 93 transitions. [2024-06-27 19:54:15,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 722 flow [2024-06-27 19:54:15,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 660 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:15,677 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 516 flow [2024-06-27 19:54:15,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=516, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-27 19:54:15,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-27 19:54:15,678 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 516 flow [2024-06-27 19:54:15,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:15,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:15,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:15,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:54:15,678 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 19:54:15,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 834777404, now seen corresponding path program 1 times [2024-06-27 19:54:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606417134] [2024-06-27 19:54:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:15,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606417134] [2024-06-27 19:54:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606417134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:16,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:16,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:16,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213712815] [2024-06-27 19:54:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:16,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:16,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:16,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 516 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:16,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:16,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:16,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:17,557 INFO L124 PetriNetUnfolderBase]: 1960/3073 cut-off events. [2024-06-27 19:54:17,557 INFO L125 PetriNetUnfolderBase]: For 47797/47797 co-relation queries the response was YES. [2024-06-27 19:54:17,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15427 conditions, 3073 events. 1960/3073 cut-off events. For 47797/47797 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15792 event pairs, 722 based on Foata normal form. 2/3075 useless extension candidates. Maximal degree in co-relation 15394. Up to 2762 conditions per place. [2024-06-27 19:54:17,572 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-27 19:54:17,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 982 flow [2024-06-27 19:54:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:54:17,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 19:54:17,574 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 516 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:54:17,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 982 flow [2024-06-27 19:54:17,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 954 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:17,595 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 624 flow [2024-06-27 19:54:17,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=624, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-27 19:54:17,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-27 19:54:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 624 flow [2024-06-27 19:54:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:17,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:17,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:54:17,597 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 19:54:17,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash 834867769, now seen corresponding path program 1 times [2024-06-27 19:54:17,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:17,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997442303] [2024-06-27 19:54:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997442303] [2024-06-27 19:54:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997442303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:18,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122627841] [2024-06-27 19:54:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:18,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 624 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 19:54:18,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:18,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:18,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:19,332 INFO L124 PetriNetUnfolderBase]: 2082/3200 cut-off events. [2024-06-27 19:54:19,332 INFO L125 PetriNetUnfolderBase]: For 54322/54322 co-relation queries the response was YES. [2024-06-27 19:54:19,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16720 conditions, 3200 events. 2082/3200 cut-off events. For 54322/54322 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15971 event pairs, 757 based on Foata normal form. 2/3202 useless extension candidates. Maximal degree in co-relation 16686. Up to 2985 conditions per place. [2024-06-27 19:54:19,348 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 98 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-06-27 19:54:19,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 968 flow [2024-06-27 19:54:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:54:19,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:54:19,349 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 624 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:54:19,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 968 flow [2024-06-27 19:54:19,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 908 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:19,379 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 652 flow [2024-06-27 19:54:19,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-06-27 19:54:19,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 19:54:19,380 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 652 flow [2024-06-27 19:54:19,380 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 19:54:19,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:19,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:19,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:54:19,380 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 19:54:19,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash 834867614, now seen corresponding path program 2 times [2024-06-27 19:54:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968154470] [2024-06-27 19:54:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:20,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968154470] [2024-06-27 19:54:20,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968154470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:20,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:20,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954680021] [2024-06-27 19:54:20,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:20,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:20,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:20,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:20,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:20,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:20,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:21,437 INFO L124 PetriNetUnfolderBase]: 1974/3090 cut-off events. [2024-06-27 19:54:21,437 INFO L125 PetriNetUnfolderBase]: For 60289/60289 co-relation queries the response was YES. [2024-06-27 19:54:21,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16794 conditions, 3090 events. 1974/3090 cut-off events. For 60289/60289 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15847 event pairs, 716 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 16758. Up to 2798 conditions per place. [2024-06-27 19:54:21,454 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 92 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-06-27 19:54:21,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 121 transitions, 944 flow [2024-06-27 19:54:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:54:21,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:54:21,455 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 652 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:54:21,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 121 transitions, 944 flow [2024-06-27 19:54:21,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 121 transitions, 862 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:21,488 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 612 flow [2024-06-27 19:54:21,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=612, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-27 19:54:21,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-27 19:54:21,488 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 612 flow [2024-06-27 19:54:21,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:21,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:21,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:21,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:54:21,489 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 19:54:21,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:21,489 INFO L85 PathProgramCache]: Analyzing trace with hash 838592636, now seen corresponding path program 1 times [2024-06-27 19:54:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:21,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886589960] [2024-06-27 19:54:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:21,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886589960] [2024-06-27 19:54:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886589960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:22,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:22,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276495913] [2024-06-27 19:54:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:22,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:22,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:22,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 612 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 19:54:22,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:22,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:22,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:22,934 INFO L124 PetriNetUnfolderBase]: 2119/3258 cut-off events. [2024-06-27 19:54:22,935 INFO L125 PetriNetUnfolderBase]: For 67175/67179 co-relation queries the response was YES. [2024-06-27 19:54:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17869 conditions, 3258 events. 2119/3258 cut-off events. For 67175/67179 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16245 event pairs, 719 based on Foata normal form. 5/3262 useless extension candidates. Maximal degree in co-relation 17832. Up to 2946 conditions per place. [2024-06-27 19:54:22,952 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 93 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-27 19:54:22,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 131 transitions, 1096 flow [2024-06-27 19:54:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:54:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:54:22,963 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 612 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:54:22,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 131 transitions, 1096 flow [2024-06-27 19:54:22,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 131 transitions, 1054 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:22,996 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 750 flow [2024-06-27 19:54:22,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=750, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-27 19:54:22,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-27 19:54:22,996 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 750 flow [2024-06-27 19:54:22,997 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 19:54:22,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:22,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:22,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:54:22,997 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 19:54:22,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash 838592419, now seen corresponding path program 2 times [2024-06-27 19:54:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:22,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436510592] [2024-06-27 19:54:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:22,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:23,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436510592] [2024-06-27 19:54:23,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436510592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:23,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241961533] [2024-06-27 19:54:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:23,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:23,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:24,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:24,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 750 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 19:54:24,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:24,485 INFO L124 PetriNetUnfolderBase]: 2146/3298 cut-off events. [2024-06-27 19:54:24,485 INFO L125 PetriNetUnfolderBase]: For 75005/75007 co-relation queries the response was YES. [2024-06-27 19:54:24,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19052 conditions, 3298 events. 2146/3298 cut-off events. For 75005/75007 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16484 event pairs, 731 based on Foata normal form. 4/3302 useless extension candidates. Maximal degree in co-relation 19013. Up to 2954 conditions per place. [2024-06-27 19:54:24,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-06-27 19:54:24,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 140 transitions, 1392 flow [2024-06-27 19:54:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:54:24,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 19:54:24,504 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 750 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:54:24,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 140 transitions, 1392 flow [2024-06-27 19:54:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 1350 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:24,538 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 954 flow [2024-06-27 19:54:24,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=954, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2024-06-27 19:54:24,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-27 19:54:24,539 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 954 flow [2024-06-27 19:54:24,539 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 19:54:24,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:24,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:24,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:54:24,539 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 19:54:24,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1653972097, now seen corresponding path program 3 times [2024-06-27 19:54:24,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:24,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172657421] [2024-06-27 19:54:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:24,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172657421] [2024-06-27 19:54:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172657421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:25,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:25,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:25,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463671920] [2024-06-27 19:54:25,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:25,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:25,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:25,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 954 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 19:54:25,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:25,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:25,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:25,986 INFO L124 PetriNetUnfolderBase]: 2141/3286 cut-off events. [2024-06-27 19:54:25,986 INFO L125 PetriNetUnfolderBase]: For 82708/82710 co-relation queries the response was YES. [2024-06-27 19:54:25,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19706 conditions, 3286 events. 2141/3286 cut-off events. For 82708/82710 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16387 event pairs, 731 based on Foata normal form. 4/3290 useless extension candidates. Maximal degree in co-relation 19664. Up to 2949 conditions per place. [2024-06-27 19:54:26,006 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 89 selfloop transitions, 43 changer transitions 0/138 dead transitions. [2024-06-27 19:54:26,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1370 flow [2024-06-27 19:54:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:54:26,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:54:26,008 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 954 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:54:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1370 flow [2024-06-27 19:54:26,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 138 transitions, 1278 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:26,062 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 956 flow [2024-06-27 19:54:26,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-27 19:54:26,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:54:26,063 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 956 flow [2024-06-27 19:54:26,063 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 19:54:26,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:26,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:54:26,065 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 19:54:26,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1653972252, now seen corresponding path program 3 times [2024-06-27 19:54:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239489407] [2024-06-27 19:54:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:26,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239489407] [2024-06-27 19:54:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239489407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:27,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:27,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715489674] [2024-06-27 19:54:27,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:27,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:27,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:27,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 956 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:27,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:27,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:27,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:27,721 INFO L124 PetriNetUnfolderBase]: 2045/3199 cut-off events. [2024-06-27 19:54:27,721 INFO L125 PetriNetUnfolderBase]: For 89010/89012 co-relation queries the response was YES. [2024-06-27 19:54:27,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19583 conditions, 3199 events. 2045/3199 cut-off events. For 89010/89012 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16413 event pairs, 686 based on Foata normal form. 4/3203 useless extension candidates. Maximal degree in co-relation 19539. Up to 2846 conditions per place. [2024-06-27 19:54:27,741 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-06-27 19:54:27,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 1320 flow [2024-06-27 19:54:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:54:27,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 19:54:27,743 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 956 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:54:27,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 1320 flow [2024-06-27 19:54:27,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1232 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:27,797 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 990 flow [2024-06-27 19:54:27,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-06-27 19:54:27,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-27 19:54:27,798 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 990 flow [2024-06-27 19:54:27,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:27,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:27,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:27,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:54:27,798 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 19:54:27,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1484426975, now seen corresponding path program 4 times [2024-06-27 19:54:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:27,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617348326] [2024-06-27 19:54:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:27,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:28,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:28,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617348326] [2024-06-27 19:54:28,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617348326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:28,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3124638] [2024-06-27 19:54:28,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:28,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:28,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 990 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 19:54:28,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:28,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:28,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:29,299 INFO L124 PetriNetUnfolderBase]: 2163/3321 cut-off events. [2024-06-27 19:54:29,299 INFO L125 PetriNetUnfolderBase]: For 97784/97784 co-relation queries the response was YES. [2024-06-27 19:54:29,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20894 conditions, 3321 events. 2163/3321 cut-off events. For 97784/97784 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16630 event pairs, 723 based on Foata normal form. 2/3323 useless extension candidates. Maximal degree in co-relation 20849. Up to 3070 conditions per place. [2024-06-27 19:54:29,316 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 108 selfloop transitions, 27 changer transitions 0/141 dead transitions. [2024-06-27 19:54:29,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 141 transitions, 1469 flow [2024-06-27 19:54:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:54:29,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 19:54:29,317 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 990 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:54:29,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 141 transitions, 1469 flow [2024-06-27 19:54:29,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1371 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:29,372 INFO L231 Difference]: Finished difference. Result has 106 places, 116 transitions, 1011 flow [2024-06-27 19:54:29,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=106, PETRI_TRANSITIONS=116} [2024-06-27 19:54:29,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 19:54:29,372 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 116 transitions, 1011 flow [2024-06-27 19:54:29,372 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 19:54:29,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:29,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:29,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:54:29,373 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 19:54:29,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:29,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1479075316, now seen corresponding path program 4 times [2024-06-27 19:54:29,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:29,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320592217] [2024-06-27 19:54:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:29,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:30,305 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 19:54:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:30,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320592217] [2024-06-27 19:54:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320592217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:30,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:30,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881142583] [2024-06-27 19:54:30,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:30,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:30,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:30,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 116 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:30,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:30,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:30,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:30,942 INFO L124 PetriNetUnfolderBase]: 2055/3206 cut-off events. [2024-06-27 19:54:30,942 INFO L125 PetriNetUnfolderBase]: For 103715/103715 co-relation queries the response was YES. [2024-06-27 19:54:30,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20452 conditions, 3206 events. 2055/3206 cut-off events. For 103715/103715 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16412 event pairs, 682 based on Foata normal form. 2/3208 useless extension candidates. Maximal degree in co-relation 20406. Up to 2911 conditions per place. [2024-06-27 19:54:30,963 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 17 changer transitions 0/142 dead transitions. [2024-06-27 19:54:30,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 142 transitions, 1377 flow [2024-06-27 19:54:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:54:30,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 19:54:30,964 INFO L175 Difference]: Start difference. First operand has 106 places, 116 transitions, 1011 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:54:30,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 142 transitions, 1377 flow [2024-06-27 19:54:31,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1242 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:31,011 INFO L231 Difference]: Finished difference. Result has 107 places, 119 transitions, 980 flow [2024-06-27 19:54:31,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=107, PETRI_TRANSITIONS=119} [2024-06-27 19:54:31,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 19:54:31,012 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 119 transitions, 980 flow [2024-06-27 19:54:31,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:31,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:31,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:31,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:54:31,013 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 19:54:31,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1471450804, now seen corresponding path program 2 times [2024-06-27 19:54:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796199747] [2024-06-27 19:54:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:31,691 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 19:54:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796199747] [2024-06-27 19:54:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796199747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:31,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:31,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726779620] [2024-06-27 19:54:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:31,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:31,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:31,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 119 transitions, 980 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 19:54:31,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:31,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:31,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:32,406 INFO L124 PetriNetUnfolderBase]: 2180/3346 cut-off events. [2024-06-27 19:54:32,406 INFO L125 PetriNetUnfolderBase]: For 113310/113310 co-relation queries the response was YES. [2024-06-27 19:54:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21736 conditions, 3346 events. 2180/3346 cut-off events. For 113310/113310 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16750 event pairs, 723 based on Foata normal form. 4/3350 useless extension candidates. Maximal degree in co-relation 21689. Up to 3129 conditions per place. [2024-06-27 19:54:32,425 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 123 selfloop transitions, 17 changer transitions 0/146 dead transitions. [2024-06-27 19:54:32,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 146 transitions, 1366 flow [2024-06-27 19:54:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:54:32,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:54:32,426 INFO L175 Difference]: Start difference. First operand has 107 places, 119 transitions, 980 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:54:32,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 146 transitions, 1366 flow [2024-06-27 19:54:32,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 146 transitions, 1286 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:32,481 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 992 flow [2024-06-27 19:54:32,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-27 19:54:32,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-27 19:54:32,481 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 992 flow [2024-06-27 19:54:32,482 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 19:54:32,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:32,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:32,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:54:32,482 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 19:54:32,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1479069364, now seen corresponding path program 3 times [2024-06-27 19:54:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:32,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422400926] [2024-06-27 19:54:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:32,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:33,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422400926] [2024-06-27 19:54:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422400926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:33,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258713453] [2024-06-27 19:54:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:33,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:33,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:33,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 992 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 19:54:33,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:33,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:33,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:33,937 INFO L124 PetriNetUnfolderBase]: 2202/3383 cut-off events. [2024-06-27 19:54:33,937 INFO L125 PetriNetUnfolderBase]: For 121503/121503 co-relation queries the response was YES. [2024-06-27 19:54:33,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22220 conditions, 3383 events. 2202/3383 cut-off events. For 121503/121503 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17007 event pairs, 723 based on Foata normal form. 4/3387 useless extension candidates. Maximal degree in co-relation 22172. Up to 3092 conditions per place. [2024-06-27 19:54:33,959 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 29 changer transitions 0/152 dead transitions. [2024-06-27 19:54:33,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 152 transitions, 1506 flow [2024-06-27 19:54:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:54:33,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:54:33,960 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 992 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:54:33,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 152 transitions, 1506 flow [2024-06-27 19:54:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 152 transitions, 1438 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:34,018 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1040 flow [2024-06-27 19:54:34,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1040, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-27 19:54:34,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-27 19:54:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1040 flow [2024-06-27 19:54:34,019 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 19:54:34,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:34,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:34,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:54:34,020 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:34,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1471717931, now seen corresponding path program 5 times [2024-06-27 19:54:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:34,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385136663] [2024-06-27 19:54:34,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:34,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:34,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385136663] [2024-06-27 19:54:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385136663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:34,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:34,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678845454] [2024-06-27 19:54:34,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:34,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:34,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1040 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 19:54:34,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:34,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:34,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:35,472 INFO L124 PetriNetUnfolderBase]: 2213/3399 cut-off events. [2024-06-27 19:54:35,472 INFO L125 PetriNetUnfolderBase]: For 128767/128767 co-relation queries the response was YES. [2024-06-27 19:54:35,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22644 conditions, 3399 events. 2213/3399 cut-off events. For 128767/128767 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17016 event pairs, 723 based on Foata normal form. 2/3401 useless extension candidates. Maximal degree in co-relation 22596. Up to 3186 conditions per place. [2024-06-27 19:54:35,494 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2024-06-27 19:54:35,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 151 transitions, 1432 flow [2024-06-27 19:54:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 19:54:35,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:54:35,497 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1040 flow. Second operand 8 states and 148 transitions. [2024-06-27 19:54:35,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 151 transitions, 1432 flow [2024-06-27 19:54:35,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 151 transitions, 1330 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:35,558 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1030 flow [2024-06-27 19:54:35,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1030, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-27 19:54:35,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:54:35,558 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1030 flow [2024-06-27 19:54:35,559 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 19:54:35,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:35,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:35,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:54:35,559 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 19:54:35,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1471717714, now seen corresponding path program 4 times [2024-06-27 19:54:35,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:35,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284124161] [2024-06-27 19:54:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:36,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284124161] [2024-06-27 19:54:36,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284124161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:36,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:36,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505335953] [2024-06-27 19:54:36,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:36,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:36,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:36,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1030 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 19:54:36,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:36,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:36,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:36,955 INFO L124 PetriNetUnfolderBase]: 2203/3385 cut-off events. [2024-06-27 19:54:36,955 INFO L125 PetriNetUnfolderBase]: For 135474/135474 co-relation queries the response was YES. [2024-06-27 19:54:36,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22614 conditions, 3385 events. 2203/3385 cut-off events. For 135474/135474 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16977 event pairs, 721 based on Foata normal form. 4/3389 useless extension candidates. Maximal degree in co-relation 22565. Up to 3136 conditions per place. [2024-06-27 19:54:36,979 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 125 selfloop transitions, 22 changer transitions 0/153 dead transitions. [2024-06-27 19:54:36,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1390 flow [2024-06-27 19:54:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:54:36,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:54:36,980 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1030 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:54:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1390 flow [2024-06-27 19:54:37,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 153 transitions, 1308 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:37,064 INFO L231 Difference]: Finished difference. Result has 115 places, 128 transitions, 1000 flow [2024-06-27 19:54:37,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1000, PETRI_PLACES=115, PETRI_TRANSITIONS=128} [2024-06-27 19:54:37,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-27 19:54:37,065 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 128 transitions, 1000 flow [2024-06-27 19:54:37,065 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 19:54:37,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:37,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:37,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:54:37,065 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 19:54:37,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1479069581, now seen corresponding path program 6 times [2024-06-27 19:54:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:37,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661338451] [2024-06-27 19:54:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:37,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661338451] [2024-06-27 19:54:37,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661338451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:37,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:37,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651553826] [2024-06-27 19:54:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:38,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:38,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 128 transitions, 1000 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 19:54:38,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:38,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:38,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:38,588 INFO L124 PetriNetUnfolderBase]: 2198/3378 cut-off events. [2024-06-27 19:54:38,588 INFO L125 PetriNetUnfolderBase]: For 142009/142009 co-relation queries the response was YES. [2024-06-27 19:54:38,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22783 conditions, 3378 events. 2198/3378 cut-off events. For 142009/142009 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16921 event pairs, 721 based on Foata normal form. 2/3380 useless extension candidates. Maximal degree in co-relation 22733. Up to 3120 conditions per place. [2024-06-27 19:54:38,610 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 116 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-27 19:54:38,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 151 transitions, 1348 flow [2024-06-27 19:54:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:54:38,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:54:38,611 INFO L175 Difference]: Start difference. First operand has 115 places, 128 transitions, 1000 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:54:38,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 151 transitions, 1348 flow [2024-06-27 19:54:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1250 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:38,689 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 968 flow [2024-06-27 19:54:38,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=968, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-27 19:54:38,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-27 19:54:38,690 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 968 flow [2024-06-27 19:54:38,690 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 19:54:38,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:38,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:38,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:54:38,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:38,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash -813620679, now seen corresponding path program 1 times [2024-06-27 19:54:38,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:38,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863063307] [2024-06-27 19:54:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:39,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:39,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863063307] [2024-06-27 19:54:39,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863063307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:39,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:39,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:54:39,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230096869] [2024-06-27 19:54:39,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:39,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:54:39,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:39,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:54:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:54:39,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 968 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:39,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:39,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:39,925 INFO L124 PetriNetUnfolderBase]: 2419/3717 cut-off events. [2024-06-27 19:54:39,925 INFO L125 PetriNetUnfolderBase]: For 169410/169410 co-relation queries the response was YES. [2024-06-27 19:54:39,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25095 conditions, 3717 events. 2419/3717 cut-off events. For 169410/169410 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 18467 event pairs, 927 based on Foata normal form. 3/3720 useless extension candidates. Maximal degree in co-relation 25044. Up to 3515 conditions per place. [2024-06-27 19:54:39,948 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 106 selfloop transitions, 11 changer transitions 0/142 dead transitions. [2024-06-27 19:54:39,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 142 transitions, 1254 flow [2024-06-27 19:54:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:54:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:54:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 19:54:39,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-27 19:54:39,949 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 968 flow. Second operand 6 states and 109 transitions. [2024-06-27 19:54:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 142 transitions, 1254 flow [2024-06-27 19:54:40,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 142 transitions, 1178 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:40,058 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 952 flow [2024-06-27 19:54:40,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=952, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2024-06-27 19:54:40,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-27 19:54:40,058 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 952 flow [2024-06-27 19:54:40,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:40,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:40,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:40,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:54:40,058 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 19:54:40,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash 221797918, now seen corresponding path program 1 times [2024-06-27 19:54:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:40,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930936437] [2024-06-27 19:54:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:41,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930936437] [2024-06-27 19:54:41,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930936437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:41,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:41,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024846319] [2024-06-27 19:54:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:41,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:41,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 952 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:41,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:41,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:41,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:42,176 INFO L124 PetriNetUnfolderBase]: 2126/3327 cut-off events. [2024-06-27 19:54:42,176 INFO L125 PetriNetUnfolderBase]: For 160433/160433 co-relation queries the response was YES. [2024-06-27 19:54:42,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23401 conditions, 3327 events. 2126/3327 cut-off events. For 160433/160433 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17157 event pairs, 502 based on Foata normal form. 4/3331 useless extension candidates. Maximal degree in co-relation 23349. Up to 2898 conditions per place. [2024-06-27 19:54:42,204 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 28 changer transitions 0/179 dead transitions. [2024-06-27 19:54:42,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 179 transitions, 1610 flow [2024-06-27 19:54:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:54:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:54:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:54:42,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 19:54:42,206 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 952 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:54:42,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 179 transitions, 1610 flow [2024-06-27 19:54:42,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 179 transitions, 1572 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:54:42,317 INFO L231 Difference]: Finished difference. Result has 121 places, 135 transitions, 1085 flow [2024-06-27 19:54:42,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1085, PETRI_PLACES=121, PETRI_TRANSITIONS=135} [2024-06-27 19:54:42,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-27 19:54:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 135 transitions, 1085 flow [2024-06-27 19:54:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:42,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:42,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:54:42,319 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 19:54:42,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 108297122, now seen corresponding path program 1 times [2024-06-27 19:54:42,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:42,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860009393] [2024-06-27 19:54:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:43,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:43,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860009393] [2024-06-27 19:54:43,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860009393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:43,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:43,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6059642] [2024-06-27 19:54:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:43,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:43,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:43,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:43,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 135 transitions, 1085 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 19:54:43,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:43,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:43,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:44,369 INFO L124 PetriNetUnfolderBase]: 2263/3476 cut-off events. [2024-06-27 19:54:44,369 INFO L125 PetriNetUnfolderBase]: For 172352/172352 co-relation queries the response was YES. [2024-06-27 19:54:44,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24910 conditions, 3476 events. 2263/3476 cut-off events. For 172352/172352 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17481 event pairs, 667 based on Foata normal form. 2/3478 useless extension candidates. Maximal degree in co-relation 24857. Up to 3193 conditions per place. [2024-06-27 19:54:44,392 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 147 selfloop transitions, 30 changer transitions 0/183 dead transitions. [2024-06-27 19:54:44,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 1785 flow [2024-06-27 19:54:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:54:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:54:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:54:44,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:54:44,393 INFO L175 Difference]: Start difference. First operand has 121 places, 135 transitions, 1085 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:54:44,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 1785 flow [2024-06-27 19:54:44,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 183 transitions, 1691 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:44,501 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1181 flow [2024-06-27 19:54:44,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1181, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-06-27 19:54:44,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-27 19:54:44,501 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1181 flow [2024-06-27 19:54:44,501 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 19:54:44,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:44,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:44,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:54:44,502 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 19:54:44,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 108296998, now seen corresponding path program 2 times [2024-06-27 19:54:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:44,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782294803] [2024-06-27 19:54:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:45,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782294803] [2024-06-27 19:54:45,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782294803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:45,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:45,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:45,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330745440] [2024-06-27 19:54:45,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:45,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:54:45,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:45,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:45,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:54:45,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:46,679 INFO L124 PetriNetUnfolderBase]: 2154/3363 cut-off events. [2024-06-27 19:54:46,679 INFO L125 PetriNetUnfolderBase]: For 182910/182910 co-relation queries the response was YES. [2024-06-27 19:54:46,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24596 conditions, 3363 events. 2154/3363 cut-off events. For 182910/182910 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17272 event pairs, 636 based on Foata normal form. 4/3367 useless extension candidates. Maximal degree in co-relation 24541. Up to 2978 conditions per place. [2024-06-27 19:54:46,704 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 138 selfloop transitions, 25 changer transitions 0/182 dead transitions. [2024-06-27 19:54:46,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 1611 flow [2024-06-27 19:54:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:54:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:54:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 19:54:46,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:54:46,705 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1181 flow. Second operand 10 states and 200 transitions. [2024-06-27 19:54:46,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 1611 flow [2024-06-27 19:54:46,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 182 transitions, 1493 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:46,802 INFO L231 Difference]: Finished difference. Result has 129 places, 141 transitions, 1121 flow [2024-06-27 19:54:46,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1121, PETRI_PLACES=129, PETRI_TRANSITIONS=141} [2024-06-27 19:54:46,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 19:54:46,802 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 141 transitions, 1121 flow [2024-06-27 19:54:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:46,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:46,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:46,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:54:46,803 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:46,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -494550010, now seen corresponding path program 2 times [2024-06-27 19:54:46,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:46,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40021269] [2024-06-27 19:54:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:46,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:48,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:48,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40021269] [2024-06-27 19:54:48,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40021269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:48,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421002174] [2024-06-27 19:54:48,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:48,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:48,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 141 transitions, 1121 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 19:54:48,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:48,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:48,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:49,031 INFO L124 PetriNetUnfolderBase]: 2266/3480 cut-off events. [2024-06-27 19:54:49,031 INFO L125 PetriNetUnfolderBase]: For 192141/192141 co-relation queries the response was YES. [2024-06-27 19:54:49,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25566 conditions, 3480 events. 2266/3480 cut-off events. For 192141/192141 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17458 event pairs, 665 based on Foata normal form. 2/3482 useless extension candidates. Maximal degree in co-relation 25509. Up to 3226 conditions per place. [2024-06-27 19:54:49,057 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 148 selfloop transitions, 25 changer transitions 0/179 dead transitions. [2024-06-27 19:54:49,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 179 transitions, 1737 flow [2024-06-27 19:54:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:54:49,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 19:54:49,058 INFO L175 Difference]: Start difference. First operand has 129 places, 141 transitions, 1121 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:54:49,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 179 transitions, 1737 flow [2024-06-27 19:54:49,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 179 transitions, 1682 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:54:49,182 INFO L231 Difference]: Finished difference. Result has 129 places, 144 transitions, 1174 flow [2024-06-27 19:54:49,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1174, PETRI_PLACES=129, PETRI_TRANSITIONS=144} [2024-06-27 19:54:49,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 19:54:49,182 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 144 transitions, 1174 flow [2024-06-27 19:54:49,182 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 19:54:49,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:49,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:54:49,183 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 19:54:49,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash -494545174, now seen corresponding path program 1 times [2024-06-27 19:54:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:49,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163818312] [2024-06-27 19:54:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:50,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163818312] [2024-06-27 19:54:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163818312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:50,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:50,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843510724] [2024-06-27 19:54:50,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:50,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:50,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:50,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 1174 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 19:54:50,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:50,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:50,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:50,927 INFO L124 PetriNetUnfolderBase]: 2293/3516 cut-off events. [2024-06-27 19:54:50,927 INFO L125 PetriNetUnfolderBase]: For 204792/204792 co-relation queries the response was YES. [2024-06-27 19:54:50,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26092 conditions, 3516 events. 2293/3516 cut-off events. For 204792/204792 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17645 event pairs, 655 based on Foata normal form. 4/3517 useless extension candidates. Maximal degree in co-relation 26034. Up to 3276 conditions per place. [2024-06-27 19:54:50,999 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 155 selfloop transitions, 20 changer transitions 0/181 dead transitions. [2024-06-27 19:54:50,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 1670 flow [2024-06-27 19:54:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:54:51,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:54:51,000 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 1174 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:54:51,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 1670 flow [2024-06-27 19:54:51,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 1580 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:51,112 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1196 flow [2024-06-27 19:54:51,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1196, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-27 19:54:51,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 19:54:51,113 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1196 flow [2024-06-27 19:54:51,113 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 19:54:51,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:51,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:51,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:54:51,113 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 19:54:51,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash 151182594, now seen corresponding path program 3 times [2024-06-27 19:54:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:51,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454311043] [2024-06-27 19:54:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:51,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:52,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:52,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454311043] [2024-06-27 19:54:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454311043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628037433] [2024-06-27 19:54:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:52,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:52,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:52,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1196 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 19:54:52,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:52,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:52,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:53,457 INFO L124 PetriNetUnfolderBase]: 2288/3511 cut-off events. [2024-06-27 19:54:53,458 INFO L125 PetriNetUnfolderBase]: For 213315/213315 co-relation queries the response was YES. [2024-06-27 19:54:53,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26581 conditions, 3511 events. 2288/3511 cut-off events. For 213315/213315 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17657 event pairs, 656 based on Foata normal form. 2/3511 useless extension candidates. Maximal degree in co-relation 26522. Up to 3278 conditions per place. [2024-06-27 19:54:53,482 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 154 selfloop transitions, 20 changer transitions 0/180 dead transitions. [2024-06-27 19:54:53,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 180 transitions, 1628 flow [2024-06-27 19:54:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 19:54:53,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:54:53,483 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1196 flow. Second operand 9 states and 171 transitions. [2024-06-27 19:54:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 180 transitions, 1628 flow [2024-06-27 19:54:53,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1508 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:53,602 INFO L231 Difference]: Finished difference. Result has 133 places, 147 transitions, 1124 flow [2024-06-27 19:54:53,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1124, PETRI_PLACES=133, PETRI_TRANSITIONS=147} [2024-06-27 19:54:53,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 19:54:53,603 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 147 transitions, 1124 flow [2024-06-27 19:54:53,603 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 19:54:53,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:53,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:53,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:54:53,603 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 19:54:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash -489903544, now seen corresponding path program 2 times [2024-06-27 19:54:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:53,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330544890] [2024-06-27 19:54:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:54,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:54,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330544890] [2024-06-27 19:54:54,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330544890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:54,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:54,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118515649] [2024-06-27 19:54:54,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:54,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:54,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 147 transitions, 1124 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 19:54:54,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:54,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:54,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:55,293 INFO L124 PetriNetUnfolderBase]: 2390/3669 cut-off events. [2024-06-27 19:54:55,294 INFO L125 PetriNetUnfolderBase]: For 235332/235334 co-relation queries the response was YES. [2024-06-27 19:54:55,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28135 conditions, 3669 events. 2390/3669 cut-off events. For 235332/235334 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18610 event pairs, 640 based on Foata normal form. 4/3670 useless extension candidates. Maximal degree in co-relation 28075. Up to 3074 conditions per place. [2024-06-27 19:54:55,322 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 125 selfloop transitions, 68 changer transitions 0/199 dead transitions. [2024-06-27 19:54:55,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2302 flow [2024-06-27 19:54:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:54:55,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:54:55,323 INFO L175 Difference]: Start difference. First operand has 133 places, 147 transitions, 1124 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:54:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2302 flow [2024-06-27 19:54:55,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 199 transitions, 2252 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:54:55,481 INFO L231 Difference]: Finished difference. Result has 134 places, 159 transitions, 1480 flow [2024-06-27 19:54:55,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1480, PETRI_PLACES=134, PETRI_TRANSITIONS=159} [2024-06-27 19:54:55,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-27 19:54:55,481 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 159 transitions, 1480 flow [2024-06-27 19:54:55,482 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 19:54:55,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:55,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:55,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:54:55,482 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 19:54:55,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash -489903730, now seen corresponding path program 4 times [2024-06-27 19:54:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398338756] [2024-06-27 19:54:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:56,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398338756] [2024-06-27 19:54:56,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398338756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:56,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:56,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:56,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649690419] [2024-06-27 19:54:56,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:56,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:56,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:56,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:57,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:57,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 159 transitions, 1480 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 19:54:57,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:57,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:57,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:57,739 INFO L124 PetriNetUnfolderBase]: 2401/3686 cut-off events. [2024-06-27 19:54:57,739 INFO L125 PetriNetUnfolderBase]: For 248632/248634 co-relation queries the response was YES. [2024-06-27 19:54:57,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29154 conditions, 3686 events. 2401/3686 cut-off events. For 248632/248634 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18704 event pairs, 675 based on Foata normal form. 4/3688 useless extension candidates. Maximal degree in co-relation 29093. Up to 3315 conditions per place. [2024-06-27 19:54:57,767 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 133 selfloop transitions, 53 changer transitions 0/192 dead transitions. [2024-06-27 19:54:57,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 192 transitions, 1996 flow [2024-06-27 19:54:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:54:57,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 19:54:57,769 INFO L175 Difference]: Start difference. First operand has 134 places, 159 transitions, 1480 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:54:57,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 192 transitions, 1996 flow [2024-06-27 19:54:57,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 192 transitions, 1888 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:57,953 INFO L231 Difference]: Finished difference. Result has 140 places, 162 transitions, 1560 flow [2024-06-27 19:54:57,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1560, PETRI_PLACES=140, PETRI_TRANSITIONS=162} [2024-06-27 19:54:57,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-27 19:54:57,953 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 162 transitions, 1560 flow [2024-06-27 19:54:57,954 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 19:54:57,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:57,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:57,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:54:57,954 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:57,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 266653440, now seen corresponding path program 3 times [2024-06-27 19:54:57,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:57,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798406954] [2024-06-27 19:54:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:57,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:58,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:58,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798406954] [2024-06-27 19:54:58,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798406954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:58,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:58,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:58,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166922292] [2024-06-27 19:54:58,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:58,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:59,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:54:59,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 162 transitions, 1560 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 19:54:59,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:59,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:54:59,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:59,677 INFO L124 PetriNetUnfolderBase]: 2391/3671 cut-off events. [2024-06-27 19:54:59,677 INFO L125 PetriNetUnfolderBase]: For 258601/258603 co-relation queries the response was YES. [2024-06-27 19:54:59,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29505 conditions, 3671 events. 2391/3671 cut-off events. For 258601/258603 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18583 event pairs, 640 based on Foata normal form. 4/3672 useless extension candidates. Maximal degree in co-relation 29442. Up to 3082 conditions per place. [2024-06-27 19:54:59,706 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 123 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-27 19:54:59,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 199 transitions, 2346 flow [2024-06-27 19:54:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:54:59,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 19:54:59,707 INFO L175 Difference]: Start difference. First operand has 140 places, 162 transitions, 1560 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:54:59,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 199 transitions, 2346 flow [2024-06-27 19:54:59,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 199 transitions, 2146 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:59,938 INFO L231 Difference]: Finished difference. Result has 142 places, 162 transitions, 1508 flow [2024-06-27 19:54:59,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1508, PETRI_PLACES=142, PETRI_TRANSITIONS=162} [2024-06-27 19:54:59,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 19:54:59,938 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 162 transitions, 1508 flow [2024-06-27 19:54:59,939 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 19:54:59,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:59,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:59,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:54:59,940 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:59,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash 266469114, now seen corresponding path program 5 times [2024-06-27 19:54:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:59,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307843866] [2024-06-27 19:54:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:01,064 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 19:55:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:01,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307843866] [2024-06-27 19:55:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307843866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:01,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:01,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:01,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792406390] [2024-06-27 19:55:01,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:01,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:01,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:01,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 162 transitions, 1508 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 19:55:01,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:01,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:01,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:01,798 INFO L124 PetriNetUnfolderBase]: 2418/3711 cut-off events. [2024-06-27 19:55:01,798 INFO L125 PetriNetUnfolderBase]: For 271353/271355 co-relation queries the response was YES. [2024-06-27 19:55:01,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30183 conditions, 3711 events. 2418/3711 cut-off events. For 271353/271355 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18807 event pairs, 673 based on Foata normal form. 4/3713 useless extension candidates. Maximal degree in co-relation 30119. Up to 3311 conditions per place. [2024-06-27 19:55:01,827 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 134 selfloop transitions, 60 changer transitions 0/200 dead transitions. [2024-06-27 19:55:01,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 200 transitions, 2280 flow [2024-06-27 19:55:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:55:01,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 19:55:01,828 INFO L175 Difference]: Start difference. First operand has 142 places, 162 transitions, 1508 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:55:01,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 200 transitions, 2280 flow [2024-06-27 19:55:02,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 2140 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:02,006 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1650 flow [2024-06-27 19:55:02,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1650, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-27 19:55:02,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 19:55:02,007 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1650 flow [2024-06-27 19:55:02,007 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 19:55:02,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:02,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:02,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:55:02,007 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:02,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash 266468990, now seen corresponding path program 3 times [2024-06-27 19:55:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:02,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848677968] [2024-06-27 19:55:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:03,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:03,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848677968] [2024-06-27 19:55:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848677968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:03,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813950674] [2024-06-27 19:55:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:03,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:03,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:03,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1650 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:03,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:03,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:03,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:04,196 INFO L124 PetriNetUnfolderBase]: 2322/3624 cut-off events. [2024-06-27 19:55:04,196 INFO L125 PetriNetUnfolderBase]: For 287747/287749 co-relation queries the response was YES. [2024-06-27 19:55:04,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30115 conditions, 3624 events. 2322/3624 cut-off events. For 287747/287749 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18848 event pairs, 640 based on Foata normal form. 6/3628 useless extension candidates. Maximal degree in co-relation 30050. Up to 3193 conditions per place. [2024-06-27 19:55:04,222 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 147 selfloop transitions, 31 changer transitions 0/201 dead transitions. [2024-06-27 19:55:04,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 201 transitions, 2150 flow [2024-06-27 19:55:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 19:55:04,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:55:04,223 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1650 flow. Second operand 9 states and 180 transitions. [2024-06-27 19:55:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 201 transitions, 2150 flow [2024-06-27 19:55:04,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 201 transitions, 1998 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:04,427 INFO L231 Difference]: Finished difference. Result has 148 places, 170 transitions, 1637 flow [2024-06-27 19:55:04,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1637, PETRI_PLACES=148, PETRI_TRANSITIONS=170} [2024-06-27 19:55:04,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 19:55:04,427 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 170 transitions, 1637 flow [2024-06-27 19:55:04,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:04,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:04,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:04,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:55:04,428 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 19:55:04,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash 266473950, now seen corresponding path program 4 times [2024-06-27 19:55:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785436641] [2024-06-27 19:55:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:05,419 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 19:55:05,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785436641] [2024-06-27 19:55:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785436641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:05,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:05,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127431776] [2024-06-27 19:55:05,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:05,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:05,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 170 transitions, 1637 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 19:55:05,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:05,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:05,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:06,154 INFO L124 PetriNetUnfolderBase]: 2425/3723 cut-off events. [2024-06-27 19:55:06,155 INFO L125 PetriNetUnfolderBase]: For 298512/298514 co-relation queries the response was YES. [2024-06-27 19:55:06,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31124 conditions, 3723 events. 2425/3723 cut-off events. For 298512/298514 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18895 event pairs, 638 based on Foata normal form. 4/3724 useless extension candidates. Maximal degree in co-relation 31057. Up to 3140 conditions per place. [2024-06-27 19:55:06,184 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 133 selfloop transitions, 67 changer transitions 0/206 dead transitions. [2024-06-27 19:55:06,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 206 transitions, 2297 flow [2024-06-27 19:55:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 19:55:06,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 19:55:06,185 INFO L175 Difference]: Start difference. First operand has 148 places, 170 transitions, 1637 flow. Second operand 9 states and 186 transitions. [2024-06-27 19:55:06,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 206 transitions, 2297 flow [2024-06-27 19:55:06,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 206 transitions, 2146 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:06,389 INFO L231 Difference]: Finished difference. Result has 150 places, 170 transitions, 1628 flow [2024-06-27 19:55:06,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1628, PETRI_PLACES=150, PETRI_TRANSITIONS=170} [2024-06-27 19:55:06,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 19:55:06,390 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 170 transitions, 1628 flow [2024-06-27 19:55:06,390 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 19:55:06,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:06,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:55:06,390 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 19:55:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 226389452, now seen corresponding path program 6 times [2024-06-27 19:55:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772205636] [2024-06-27 19:55:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:07,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772205636] [2024-06-27 19:55:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772205636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:07,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:07,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130265357] [2024-06-27 19:55:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:07,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:07,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 170 transitions, 1628 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 19:55:07,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:07,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:07,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:08,500 INFO L124 PetriNetUnfolderBase]: 2420/3717 cut-off events. [2024-06-27 19:55:08,500 INFO L125 PetriNetUnfolderBase]: For 306325/306327 co-relation queries the response was YES. [2024-06-27 19:55:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31248 conditions, 3717 events. 2420/3717 cut-off events. For 306325/306327 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18904 event pairs, 671 based on Foata normal form. 4/3719 useless extension candidates. Maximal degree in co-relation 31180. Up to 3346 conditions per place. [2024-06-27 19:55:08,531 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 142 selfloop transitions, 52 changer transitions 0/200 dead transitions. [2024-06-27 19:55:08,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2092 flow [2024-06-27 19:55:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 19:55:08,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 19:55:08,532 INFO L175 Difference]: Start difference. First operand has 150 places, 170 transitions, 1628 flow. Second operand 9 states and 176 transitions. [2024-06-27 19:55:08,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2092 flow [2024-06-27 19:55:08,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 200 transitions, 1888 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:08,761 INFO L231 Difference]: Finished difference. Result has 150 places, 170 transitions, 1536 flow [2024-06-27 19:55:08,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1536, PETRI_PLACES=150, PETRI_TRANSITIONS=170} [2024-06-27 19:55:08,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 19:55:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 170 transitions, 1536 flow [2024-06-27 19:55:08,761 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 19:55:08,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:08,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:55:08,762 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:08,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash 20623302, now seen corresponding path program 1 times [2024-06-27 19:55:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272700999] [2024-06-27 19:55:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:09,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:09,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272700999] [2024-06-27 19:55:09,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272700999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:09,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:09,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:09,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771995043] [2024-06-27 19:55:09,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:09,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:09,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:09,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:09,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 170 transitions, 1536 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:09,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:09,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:09,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:10,101 INFO L124 PetriNetUnfolderBase]: 2673/4089 cut-off events. [2024-06-27 19:55:10,101 INFO L125 PetriNetUnfolderBase]: For 359152/359158 co-relation queries the response was YES. [2024-06-27 19:55:10,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34364 conditions, 4089 events. 2673/4089 cut-off events. For 359152/359158 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20661 event pairs, 867 based on Foata normal form. 4/4083 useless extension candidates. Maximal degree in co-relation 34295. Up to 3830 conditions per place. [2024-06-27 19:55:10,136 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 143 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2024-06-27 19:55:10,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 192 transitions, 2054 flow [2024-06-27 19:55:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 19:55:10,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:55:10,137 INFO L175 Difference]: Start difference. First operand has 150 places, 170 transitions, 1536 flow. Second operand 6 states and 116 transitions. [2024-06-27 19:55:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 192 transitions, 2054 flow [2024-06-27 19:55:10,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 192 transitions, 1932 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:55:10,404 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1531 flow [2024-06-27 19:55:10,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-27 19:55:10,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 19:55:10,404 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1531 flow [2024-06-27 19:55:10,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:10,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:10,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:55:10,405 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:10,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -622755212, now seen corresponding path program 7 times [2024-06-27 19:55:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:10,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528198502] [2024-06-27 19:55:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:10,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:11,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528198502] [2024-06-27 19:55:11,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528198502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:11,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:11,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263685806] [2024-06-27 19:55:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:11,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:11,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1531 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 19:55:11,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:11,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:11,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:12,408 INFO L124 PetriNetUnfolderBase]: 2455/3759 cut-off events. [2024-06-27 19:55:12,409 INFO L125 PetriNetUnfolderBase]: For 331367/331367 co-relation queries the response was YES. [2024-06-27 19:55:12,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32179 conditions, 3759 events. 2455/3759 cut-off events. For 331367/331367 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 19025 event pairs, 664 based on Foata normal form. 2/3755 useless extension candidates. Maximal degree in co-relation 32109. Up to 3524 conditions per place. [2024-06-27 19:55:12,437 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 178 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2024-06-27 19:55:12,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 206 transitions, 2077 flow [2024-06-27 19:55:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 19:55:12,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 19:55:12,438 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1531 flow. Second operand 9 states and 165 transitions. [2024-06-27 19:55:12,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 206 transitions, 2077 flow [2024-06-27 19:55:12,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 206 transitions, 2041 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:55:12,634 INFO L231 Difference]: Finished difference. Result has 155 places, 179 transitions, 1631 flow [2024-06-27 19:55:12,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1631, PETRI_PLACES=155, PETRI_TRANSITIONS=179} [2024-06-27 19:55:12,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 19:55:12,635 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 179 transitions, 1631 flow [2024-06-27 19:55:12,635 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 19:55:12,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:12,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:12,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:55:12,635 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 19:55:12,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 438542174, now seen corresponding path program 5 times [2024-06-27 19:55:12,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:12,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744725583] [2024-06-27 19:55:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744725583] [2024-06-27 19:55:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744725583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:13,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:13,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093422035] [2024-06-27 19:55:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:13,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:13,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:13,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 179 transitions, 1631 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 19:55:13,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:13,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:13,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:14,322 INFO L124 PetriNetUnfolderBase]: 2509/3837 cut-off events. [2024-06-27 19:55:14,322 INFO L125 PetriNetUnfolderBase]: For 354921/354921 co-relation queries the response was YES. [2024-06-27 19:55:14,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33641 conditions, 3837 events. 2509/3837 cut-off events. For 354921/354921 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19446 event pairs, 669 based on Foata normal form. 4/3835 useless extension candidates. Maximal degree in co-relation 33569. Up to 3509 conditions per place. [2024-06-27 19:55:14,359 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 179 selfloop transitions, 30 changer transitions 0/217 dead transitions. [2024-06-27 19:55:14,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 217 transitions, 2451 flow [2024-06-27 19:55:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:55:14,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:55:14,360 INFO L175 Difference]: Start difference. First operand has 155 places, 179 transitions, 1631 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:55:14,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 217 transitions, 2451 flow [2024-06-27 19:55:14,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 217 transitions, 2339 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:14,738 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 1733 flow [2024-06-27 19:55:14,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1733, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-06-27 19:55:14,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-27 19:55:14,739 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 1733 flow [2024-06-27 19:55:14,739 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 19:55:14,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:14,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:55:14,739 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 19:55:14,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1393491160, now seen corresponding path program 6 times [2024-06-27 19:55:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950384517] [2024-06-27 19:55:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:15,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:15,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950384517] [2024-06-27 19:55:15,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950384517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:15,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:15,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:15,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334050353] [2024-06-27 19:55:15,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:15,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:15,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:15,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 1733 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 19:55:15,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:15,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:15,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:16,427 INFO L124 PetriNetUnfolderBase]: 2531/3874 cut-off events. [2024-06-27 19:55:16,427 INFO L125 PetriNetUnfolderBase]: For 370489/370489 co-relation queries the response was YES. [2024-06-27 19:55:16,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34226 conditions, 3874 events. 2531/3874 cut-off events. For 370489/370489 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19691 event pairs, 671 based on Foata normal form. 4/3872 useless extension candidates. Maximal degree in co-relation 34153. Up to 3426 conditions per place. [2024-06-27 19:55:16,465 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 167 selfloop transitions, 47 changer transitions 0/222 dead transitions. [2024-06-27 19:55:16,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 222 transitions, 2689 flow [2024-06-27 19:55:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:55:16,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 19:55:16,466 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 1733 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:55:16,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 222 transitions, 2689 flow [2024-06-27 19:55:16,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 222 transitions, 2587 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:16,815 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 1809 flow [2024-06-27 19:55:16,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1809, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-27 19:55:16,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-27 19:55:16,815 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 1809 flow [2024-06-27 19:55:16,815 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 19:55:16,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:16,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:16,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:55:16,816 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:16,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1308654190, now seen corresponding path program 7 times [2024-06-27 19:55:16,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:16,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280473306] [2024-06-27 19:55:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:16,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280473306] [2024-06-27 19:55:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280473306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:17,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:17,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330548426] [2024-06-27 19:55:17,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:17,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:17,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:17,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 1809 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 19:55:17,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:17,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:17,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:18,649 INFO L124 PetriNetUnfolderBase]: 2553/3911 cut-off events. [2024-06-27 19:55:18,649 INFO L125 PetriNetUnfolderBase]: For 384998/384998 co-relation queries the response was YES. [2024-06-27 19:55:18,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34834 conditions, 3911 events. 2553/3911 cut-off events. For 384998/384998 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19938 event pairs, 671 based on Foata normal form. 4/3909 useless extension candidates. Maximal degree in co-relation 34759. Up to 3445 conditions per place. [2024-06-27 19:55:18,684 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 169 selfloop transitions, 49 changer transitions 0/226 dead transitions. [2024-06-27 19:55:18,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 226 transitions, 2791 flow [2024-06-27 19:55:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:55:18,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 19:55:18,685 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 1809 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:55:18,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 226 transitions, 2791 flow [2024-06-27 19:55:19,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 226 transitions, 2533 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 19:55:19,106 INFO L231 Difference]: Finished difference. Result has 162 places, 191 transitions, 1739 flow [2024-06-27 19:55:19,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1739, PETRI_PLACES=162, PETRI_TRANSITIONS=191} [2024-06-27 19:55:19,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-27 19:55:19,106 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 191 transitions, 1739 flow [2024-06-27 19:55:19,106 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 19:55:19,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:19,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:19,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:55:19,106 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:19,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1621392310, now seen corresponding path program 8 times [2024-06-27 19:55:19,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:19,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879514512] [2024-06-27 19:55:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:19,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:19,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879514512] [2024-06-27 19:55:19,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879514512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:19,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:19,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:19,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709664850] [2024-06-27 19:55:19,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:19,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:19,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:20,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:20,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 191 transitions, 1739 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 19:55:20,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:20,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:20,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:20,827 INFO L124 PetriNetUnfolderBase]: 2575/3943 cut-off events. [2024-06-27 19:55:20,827 INFO L125 PetriNetUnfolderBase]: For 397064/397064 co-relation queries the response was YES. [2024-06-27 19:55:20,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34942 conditions, 3943 events. 2575/3943 cut-off events. For 397064/397064 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20134 event pairs, 676 based on Foata normal form. 4/3941 useless extension candidates. Maximal degree in co-relation 34867. Up to 3592 conditions per place. [2024-06-27 19:55:20,863 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 186 selfloop transitions, 32 changer transitions 0/226 dead transitions. [2024-06-27 19:55:20,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 226 transitions, 2507 flow [2024-06-27 19:55:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:55:20,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:55:20,866 INFO L175 Difference]: Start difference. First operand has 162 places, 191 transitions, 1739 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:55:20,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 226 transitions, 2507 flow [2024-06-27 19:55:21,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 226 transitions, 2379 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:21,222 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 1741 flow [2024-06-27 19:55:21,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1741, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-27 19:55:21,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-27 19:55:21,223 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 1741 flow [2024-06-27 19:55:21,223 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 19:55:21,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:21,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:21,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:55:21,223 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 19:55:21,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1072472320, now seen corresponding path program 9 times [2024-06-27 19:55:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467548649] [2024-06-27 19:55:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:22,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467548649] [2024-06-27 19:55:22,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467548649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:22,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:22,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620239921] [2024-06-27 19:55:22,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:22,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:22,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 1741 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 19:55:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:22,951 INFO L124 PetriNetUnfolderBase]: 2565/3929 cut-off events. [2024-06-27 19:55:22,951 INFO L125 PetriNetUnfolderBase]: For 406509/406509 co-relation queries the response was YES. [2024-06-27 19:55:22,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34782 conditions, 3929 events. 2565/3929 cut-off events. For 406509/406509 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20062 event pairs, 674 based on Foata normal form. 4/3927 useless extension candidates. Maximal degree in co-relation 34706. Up to 3661 conditions per place. [2024-06-27 19:55:22,985 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 195 selfloop transitions, 20 changer transitions 0/223 dead transitions. [2024-06-27 19:55:22,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 223 transitions, 2247 flow [2024-06-27 19:55:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:55:22,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 19:55:22,987 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 1741 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:55:22,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 223 transitions, 2247 flow [2024-06-27 19:55:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 223 transitions, 2123 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:23,329 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 1665 flow [2024-06-27 19:55:23,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1665, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-06-27 19:55:23,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-27 19:55:23,330 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 1665 flow [2024-06-27 19:55:23,330 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 19:55:23,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:23,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:23,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:55:23,330 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 19:55:23,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1308654376, now seen corresponding path program 8 times [2024-06-27 19:55:23,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:23,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163150830] [2024-06-27 19:55:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:24,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163150830] [2024-06-27 19:55:24,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163150830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:24,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:24,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:24,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360141443] [2024-06-27 19:55:24,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:24,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:24,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:24,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:24,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 1665 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 19:55:24,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:24,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:24,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:25,204 INFO L124 PetriNetUnfolderBase]: 2576/3945 cut-off events. [2024-06-27 19:55:25,204 INFO L125 PetriNetUnfolderBase]: For 419047/419047 co-relation queries the response was YES. [2024-06-27 19:55:25,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35017 conditions, 3945 events. 2576/3945 cut-off events. For 419047/419047 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20200 event pairs, 679 based on Foata normal form. 2/3941 useless extension candidates. Maximal degree in co-relation 34940. Up to 3655 conditions per place. [2024-06-27 19:55:25,236 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 32 changer transitions 0/224 dead transitions. [2024-06-27 19:55:25,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 224 transitions, 2253 flow [2024-06-27 19:55:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:55:25,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 19:55:25,237 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 1665 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:55:25,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 224 transitions, 2253 flow [2024-06-27 19:55:25,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 224 transitions, 2189 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:25,547 INFO L231 Difference]: Finished difference. Result has 168 places, 197 transitions, 1767 flow [2024-06-27 19:55:25,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1767, PETRI_PLACES=168, PETRI_TRANSITIONS=197} [2024-06-27 19:55:25,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-27 19:55:25,548 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 197 transitions, 1767 flow [2024-06-27 19:55:25,548 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 19:55:25,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:25,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:25,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:55:25,549 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 19:55:25,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1393306834, now seen corresponding path program 9 times [2024-06-27 19:55:25,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:25,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706257617] [2024-06-27 19:55:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:26,675 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 19:55:26,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:26,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706257617] [2024-06-27 19:55:26,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706257617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:26,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:26,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:26,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162453219] [2024-06-27 19:55:26,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:26,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:26,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:26,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:26,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 197 transitions, 1767 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 19:55:26,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:26,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:26,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:27,669 INFO L124 PetriNetUnfolderBase]: 2571/3938 cut-off events. [2024-06-27 19:55:27,669 INFO L125 PetriNetUnfolderBase]: For 433751/433751 co-relation queries the response was YES. [2024-06-27 19:55:27,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35480 conditions, 3938 events. 2571/3938 cut-off events. For 433751/433751 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20125 event pairs, 679 based on Foata normal form. 2/3934 useless extension candidates. Maximal degree in co-relation 35402. Up to 3616 conditions per place. [2024-06-27 19:55:27,703 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 42 changer transitions 0/231 dead transitions. [2024-06-27 19:55:27,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 231 transitions, 2385 flow [2024-06-27 19:55:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:55:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:55:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 19:55:27,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 19:55:27,704 INFO L175 Difference]: Start difference. First operand has 168 places, 197 transitions, 1767 flow. Second operand 10 states and 186 transitions. [2024-06-27 19:55:27,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 231 transitions, 2385 flow [2024-06-27 19:55:28,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 231 transitions, 2243 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:28,019 INFO L231 Difference]: Finished difference. Result has 171 places, 200 transitions, 1818 flow [2024-06-27 19:55:28,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1818, PETRI_PLACES=171, PETRI_TRANSITIONS=200} [2024-06-27 19:55:28,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-27 19:55:28,020 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 200 transitions, 1818 flow [2024-06-27 19:55:28,020 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 19:55:28,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:28,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:28,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:55:28,020 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 19:55:28,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1308832130, now seen corresponding path program 4 times [2024-06-27 19:55:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:28,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527297412] [2024-06-27 19:55:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527297412] [2024-06-27 19:55:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527297412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019552339] [2024-06-27 19:55:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:29,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:29,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 200 transitions, 1818 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:29,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:29,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:29,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:29,985 INFO L124 PetriNetUnfolderBase]: 2442/3805 cut-off events. [2024-06-27 19:55:29,985 INFO L125 PetriNetUnfolderBase]: For 444925/444925 co-relation queries the response was YES. [2024-06-27 19:55:30,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34658 conditions, 3805 events. 2442/3805 cut-off events. For 444925/444925 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19878 event pairs, 648 based on Foata normal form. 4/3803 useless extension candidates. Maximal degree in co-relation 34579. Up to 3412 conditions per place. [2024-06-27 19:55:30,020 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 19 changer transitions 0/230 dead transitions. [2024-06-27 19:55:30,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 230 transitions, 2368 flow [2024-06-27 19:55:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:55:30,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:55:30,022 INFO L175 Difference]: Start difference. First operand has 171 places, 200 transitions, 1818 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:55:30,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 230 transitions, 2368 flow [2024-06-27 19:55:30,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 230 transitions, 2201 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:55:30,459 INFO L231 Difference]: Finished difference. Result has 172 places, 202 transitions, 1776 flow [2024-06-27 19:55:30,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1776, PETRI_PLACES=172, PETRI_TRANSITIONS=202} [2024-06-27 19:55:30,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 19:55:30,460 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 202 transitions, 1776 flow [2024-06-27 19:55:30,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:30,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:30,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:30,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:55:30,460 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 19:55:30,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1308827170, now seen corresponding path program 10 times [2024-06-27 19:55:30,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:30,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604581175] [2024-06-27 19:55:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:30,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604581175] [2024-06-27 19:55:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604581175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888229624] [2024-06-27 19:55:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:31,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:31,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 202 transitions, 1776 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 19:55:31,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:31,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:31,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:32,218 INFO L124 PetriNetUnfolderBase]: 2553/3912 cut-off events. [2024-06-27 19:55:32,218 INFO L125 PetriNetUnfolderBase]: For 458171/458171 co-relation queries the response was YES. [2024-06-27 19:55:32,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35666 conditions, 3912 events. 2553/3912 cut-off events. For 458171/458171 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19965 event pairs, 660 based on Foata normal form. 4/3910 useless extension candidates. Maximal degree in co-relation 35586. Up to 3445 conditions per place. [2024-06-27 19:55:32,250 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 169 selfloop transitions, 55 changer transitions 0/232 dead transitions. [2024-06-27 19:55:32,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 232 transitions, 2304 flow [2024-06-27 19:55:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:55:32,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 19:55:32,251 INFO L175 Difference]: Start difference. First operand has 172 places, 202 transitions, 1776 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:55:32,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 232 transitions, 2304 flow [2024-06-27 19:55:32,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 232 transitions, 2161 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:32,586 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 1751 flow [2024-06-27 19:55:32,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1751, PETRI_PLACES=174, PETRI_TRANSITIONS=202} [2024-06-27 19:55:32,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-27 19:55:32,586 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 1751 flow [2024-06-27 19:55:32,586 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 19:55:32,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:32,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:32,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:55:32,587 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 19:55:32,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash 35310792, now seen corresponding path program 2 times [2024-06-27 19:55:32,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:32,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026684475] [2024-06-27 19:55:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:32,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026684475] [2024-06-27 19:55:33,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026684475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:33,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:33,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:33,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441368582] [2024-06-27 19:55:33,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:33,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:33,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 202 transitions, 1751 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:33,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:33,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:33,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:33,994 INFO L124 PetriNetUnfolderBase]: 2780/4238 cut-off events. [2024-06-27 19:55:33,994 INFO L125 PetriNetUnfolderBase]: For 529396/529408 co-relation queries the response was YES. [2024-06-27 19:55:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38904 conditions, 4238 events. 2780/4238 cut-off events. For 529396/529408 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21334 event pairs, 860 based on Foata normal form. 9/4216 useless extension candidates. Maximal degree in co-relation 38823. Up to 3998 conditions per place. [2024-06-27 19:55:34,038 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 166 selfloop transitions, 11 changer transitions 0/211 dead transitions. [2024-06-27 19:55:34,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 211 transitions, 2127 flow [2024-06-27 19:55:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 19:55:34,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 19:55:34,039 INFO L175 Difference]: Start difference. First operand has 174 places, 202 transitions, 1751 flow. Second operand 6 states and 107 transitions. [2024-06-27 19:55:34,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 211 transitions, 2127 flow [2024-06-27 19:55:34,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 211 transitions, 1975 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:34,649 INFO L231 Difference]: Finished difference. Result has 171 places, 202 transitions, 1627 flow [2024-06-27 19:55:34,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1627, PETRI_PLACES=171, PETRI_TRANSITIONS=202} [2024-06-27 19:55:34,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-27 19:55:34,649 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 202 transitions, 1627 flow [2024-06-27 19:55:34,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:34,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:34,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:34,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:55:34,650 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 19:55:34,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash 547286980, now seen corresponding path program 1 times [2024-06-27 19:55:34,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:34,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613363469] [2024-06-27 19:55:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:35,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:35,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613363469] [2024-06-27 19:55:35,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613363469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:35,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:35,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:35,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043760615] [2024-06-27 19:55:35,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:35,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:35,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:55:35,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 202 transitions, 1627 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:35,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:35,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:55:35,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:36,084 INFO L124 PetriNetUnfolderBase]: 3045/4547 cut-off events. [2024-06-27 19:55:36,085 INFO L125 PetriNetUnfolderBase]: For 543232/543232 co-relation queries the response was YES. [2024-06-27 19:55:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40331 conditions, 4547 events. 3045/4547 cut-off events. For 543232/543232 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 22180 event pairs, 902 based on Foata normal form. 1/4548 useless extension candidates. Maximal degree in co-relation 40249. Up to 4377 conditions per place. [2024-06-27 19:55:36,123 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 182 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-27 19:55:36,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 221 transitions, 2251 flow [2024-06-27 19:55:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 19:55:36,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:55:36,124 INFO L175 Difference]: Start difference. First operand has 171 places, 202 transitions, 1627 flow. Second operand 6 states and 108 transitions. [2024-06-27 19:55:36,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 221 transitions, 2251 flow [2024-06-27 19:55:36,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 221 transitions, 2213 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:36,533 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 1717 flow [2024-06-27 19:55:36,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1717, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-27 19:55:36,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 19:55:36,534 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 1717 flow [2024-06-27 19:55:36,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:36,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:36,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:55:36,534 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:36,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1072164490, now seen corresponding path program 1 times [2024-06-27 19:55:36,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:36,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017652148] [2024-06-27 19:55:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:37,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017652148] [2024-06-27 19:55:37,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017652148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:37,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:37,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:37,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113584850] [2024-06-27 19:55:37,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:37,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:55:37,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 1717 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:37,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:37,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:55:37,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:38,888 INFO L124 PetriNetUnfolderBase]: 2986/4480 cut-off events. [2024-06-27 19:55:38,888 INFO L125 PetriNetUnfolderBase]: For 566361/566373 co-relation queries the response was YES. [2024-06-27 19:55:38,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40899 conditions, 4480 events. 2986/4480 cut-off events. For 566361/566373 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22011 event pairs, 806 based on Foata normal form. 4/4475 useless extension candidates. Maximal degree in co-relation 40816. Up to 4265 conditions per place. [2024-06-27 19:55:38,930 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 21 changer transitions 0/241 dead transitions. [2024-06-27 19:55:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 241 transitions, 2343 flow [2024-06-27 19:55:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 19:55:38,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 19:55:38,931 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 1717 flow. Second operand 9 states and 158 transitions. [2024-06-27 19:55:38,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 241 transitions, 2343 flow [2024-06-27 19:55:39,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 241 transitions, 2293 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 19:55:39,420 INFO L231 Difference]: Finished difference. Result has 180 places, 213 transitions, 1818 flow [2024-06-27 19:55:39,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1818, PETRI_PLACES=180, PETRI_TRANSITIONS=213} [2024-06-27 19:55:39,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 19:55:39,421 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 213 transitions, 1818 flow [2024-06-27 19:55:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:39,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:39,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:55:39,421 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 19:55:39,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:39,421 INFO L85 PathProgramCache]: Analyzing trace with hash 349494252, now seen corresponding path program 2 times [2024-06-27 19:55:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917300717] [2024-06-27 19:55:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:39,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:39,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:39,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917300717] [2024-06-27 19:55:39,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917300717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:39,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:39,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:39,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82999661] [2024-06-27 19:55:39,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:39,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:39,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:40,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:55:40,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 213 transitions, 1818 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:40,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:40,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:55:40,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:40,877 INFO L124 PetriNetUnfolderBase]: 3034/4532 cut-off events. [2024-06-27 19:55:40,877 INFO L125 PetriNetUnfolderBase]: For 574011/574013 co-relation queries the response was YES. [2024-06-27 19:55:40,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41404 conditions, 4532 events. 3034/4532 cut-off events. For 574011/574013 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22058 event pairs, 878 based on Foata normal form. 3/4535 useless extension candidates. Maximal degree in co-relation 41318. Up to 4362 conditions per place. [2024-06-27 19:55:40,921 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 183 selfloop transitions, 16 changer transitions 0/222 dead transitions. [2024-06-27 19:55:40,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 222 transitions, 2238 flow [2024-06-27 19:55:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 19:55:40,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 19:55:40,922 INFO L175 Difference]: Start difference. First operand has 180 places, 213 transitions, 1818 flow. Second operand 6 states and 104 transitions. [2024-06-27 19:55:40,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 222 transitions, 2238 flow [2024-06-27 19:55:41,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 222 transitions, 2109 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:41,486 INFO L231 Difference]: Finished difference. Result has 180 places, 213 transitions, 1727 flow [2024-06-27 19:55:41,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1727, PETRI_PLACES=180, PETRI_TRANSITIONS=213} [2024-06-27 19:55:41,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 19:55:41,487 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 213 transitions, 1727 flow [2024-06-27 19:55:41,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:41,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:41,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:41,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:55:41,487 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:41,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash -939632934, now seen corresponding path program 1 times [2024-06-27 19:55:41,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:41,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5403543] [2024-06-27 19:55:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:41,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5403543] [2024-06-27 19:55:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5403543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686528541] [2024-06-27 19:55:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:42,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:42,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:42,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:42,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 213 transitions, 1727 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 19:55:42,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:42,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:42,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:43,882 INFO L124 PetriNetUnfolderBase]: 2815/4300 cut-off events. [2024-06-27 19:55:43,882 INFO L125 PetriNetUnfolderBase]: For 599189/599217 co-relation queries the response was YES. [2024-06-27 19:55:43,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41050 conditions, 4300 events. 2815/4300 cut-off events. For 599189/599217 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22094 event pairs, 593 based on Foata normal form. 4/4289 useless extension candidates. Maximal degree in co-relation 40963. Up to 3831 conditions per place. [2024-06-27 19:55:43,923 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 215 selfloop transitions, 40 changer transitions 0/266 dead transitions. [2024-06-27 19:55:43,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 266 transitions, 2747 flow [2024-06-27 19:55:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 19:55:43,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:55:43,924 INFO L175 Difference]: Start difference. First operand has 180 places, 213 transitions, 1727 flow. Second operand 11 states and 215 transitions. [2024-06-27 19:55:43,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 266 transitions, 2747 flow [2024-06-27 19:55:44,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 266 transitions, 2703 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:44,352 INFO L231 Difference]: Finished difference. Result has 186 places, 217 transitions, 1938 flow [2024-06-27 19:55:44,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1938, PETRI_PLACES=186, PETRI_TRANSITIONS=217} [2024-06-27 19:55:44,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-27 19:55:44,352 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 217 transitions, 1938 flow [2024-06-27 19:55:44,352 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 19:55:44,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:44,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:44,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:55:44,353 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:44,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash 304858563, now seen corresponding path program 1 times [2024-06-27 19:55:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860500416] [2024-06-27 19:55:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:45,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:45,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860500416] [2024-06-27 19:55:45,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860500416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:45,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889033938] [2024-06-27 19:55:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:45,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:45,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:45,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 217 transitions, 1938 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 19:55:45,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:45,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:45,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:46,910 INFO L124 PetriNetUnfolderBase]: 2854/4352 cut-off events. [2024-06-27 19:55:46,910 INFO L125 PetriNetUnfolderBase]: For 630111/630127 co-relation queries the response was YES. [2024-06-27 19:55:46,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42289 conditions, 4352 events. 2854/4352 cut-off events. For 630111/630127 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22376 event pairs, 729 based on Foata normal form. 4/4337 useless extension candidates. Maximal degree in co-relation 42201. Up to 3973 conditions per place. [2024-06-27 19:55:46,953 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 222 selfloop transitions, 41 changer transitions 0/274 dead transitions. [2024-06-27 19:55:46,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 274 transitions, 2698 flow [2024-06-27 19:55:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:55:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:55:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 244 transitions. [2024-06-27 19:55:46,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364937388193202 [2024-06-27 19:55:46,954 INFO L175 Difference]: Start difference. First operand has 186 places, 217 transitions, 1938 flow. Second operand 13 states and 244 transitions. [2024-06-27 19:55:46,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 274 transitions, 2698 flow [2024-06-27 19:55:47,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 274 transitions, 2553 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:47,517 INFO L231 Difference]: Finished difference. Result has 192 places, 220 transitions, 1986 flow [2024-06-27 19:55:47,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1986, PETRI_PLACES=192, PETRI_TRANSITIONS=220} [2024-06-27 19:55:47,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 19:55:47,518 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 220 transitions, 1986 flow [2024-06-27 19:55:47,518 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 19:55:47,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:47,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:47,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:55:47,518 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:47,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash 304858408, now seen corresponding path program 2 times [2024-06-27 19:55:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563288798] [2024-06-27 19:55:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:47,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:48,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563288798] [2024-06-27 19:55:48,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563288798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:48,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:48,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:48,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471211894] [2024-06-27 19:55:48,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:48,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:49,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:49,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 220 transitions, 1986 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 19:55:49,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:49,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:49,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:50,226 INFO L124 PetriNetUnfolderBase]: 2868/4378 cut-off events. [2024-06-27 19:55:50,226 INFO L125 PetriNetUnfolderBase]: For 650619/650657 co-relation queries the response was YES. [2024-06-27 19:55:50,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42939 conditions, 4378 events. 2868/4378 cut-off events. For 650619/650657 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22529 event pairs, 738 based on Foata normal form. 4/4363 useless extension candidates. Maximal degree in co-relation 42849. Up to 4033 conditions per place. [2024-06-27 19:55:50,272 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 221 selfloop transitions, 35 changer transitions 0/267 dead transitions. [2024-06-27 19:55:50,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 267 transitions, 2672 flow [2024-06-27 19:55:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 19:55:50,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-27 19:55:50,273 INFO L175 Difference]: Start difference. First operand has 192 places, 220 transitions, 1986 flow. Second operand 11 states and 211 transitions. [2024-06-27 19:55:50,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 267 transitions, 2672 flow [2024-06-27 19:55:50,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 267 transitions, 2509 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-06-27 19:55:50,798 INFO L231 Difference]: Finished difference. Result has 192 places, 222 transitions, 1964 flow [2024-06-27 19:55:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1964, PETRI_PLACES=192, PETRI_TRANSITIONS=222} [2024-06-27 19:55:50,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 19:55:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 222 transitions, 1964 flow [2024-06-27 19:55:50,799 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 19:55:50,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:50,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:50,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:55:50,799 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 304854688, now seen corresponding path program 3 times [2024-06-27 19:55:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014421920] [2024-06-27 19:55:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:52,064 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 19:55:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:52,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014421920] [2024-06-27 19:55:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014421920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:52,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666927977] [2024-06-27 19:55:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:52,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:52,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:52,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:52,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 222 transitions, 1964 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 19:55:52,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:52,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:52,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:53,233 INFO L124 PetriNetUnfolderBase]: 2902/4432 cut-off events. [2024-06-27 19:55:53,233 INFO L125 PetriNetUnfolderBase]: For 672406/672444 co-relation queries the response was YES. [2024-06-27 19:55:53,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43368 conditions, 4432 events. 2902/4432 cut-off events. For 672406/672444 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 22943 event pairs, 733 based on Foata normal form. 4/4417 useless extension candidates. Maximal degree in co-relation 43277. Up to 4046 conditions per place. [2024-06-27 19:55:53,280 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 223 selfloop transitions, 38 changer transitions 0/272 dead transitions. [2024-06-27 19:55:53,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 272 transitions, 2678 flow [2024-06-27 19:55:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 19:55:53,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 19:55:53,281 INFO L175 Difference]: Start difference. First operand has 192 places, 222 transitions, 1964 flow. Second operand 11 states and 213 transitions. [2024-06-27 19:55:53,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 272 transitions, 2678 flow [2024-06-27 19:55:53,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 272 transitions, 2559 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:53,922 INFO L231 Difference]: Finished difference. Result has 195 places, 226 transitions, 2018 flow [2024-06-27 19:55:53,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2018, PETRI_PLACES=195, PETRI_TRANSITIONS=226} [2024-06-27 19:55:53,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 19:55:53,922 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 226 transitions, 2018 flow [2024-06-27 19:55:53,922 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 19:55:53,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:53,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:55:53,923 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:53,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:53,923 INFO L85 PathProgramCache]: Analyzing trace with hash 391550218, now seen corresponding path program 4 times [2024-06-27 19:55:53,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:53,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341513776] [2024-06-27 19:55:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:53,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:55,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:55,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341513776] [2024-06-27 19:55:55,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341513776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:55,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:55,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491529871] [2024-06-27 19:55:55,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:55,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:55,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:55,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:55,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:55,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:55,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 226 transitions, 2018 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 19:55:55,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:55,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:55,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:56,538 INFO L124 PetriNetUnfolderBase]: 2919/4459 cut-off events. [2024-06-27 19:55:56,538 INFO L125 PetriNetUnfolderBase]: For 693437/693475 co-relation queries the response was YES. [2024-06-27 19:55:56,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43901 conditions, 4459 events. 2919/4459 cut-off events. For 693437/693475 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23118 event pairs, 738 based on Foata normal form. 4/4444 useless extension candidates. Maximal degree in co-relation 43808. Up to 4147 conditions per place. [2024-06-27 19:55:56,584 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 228 selfloop transitions, 27 changer transitions 0/266 dead transitions. [2024-06-27 19:55:56,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 266 transitions, 2692 flow [2024-06-27 19:55:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:55:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:55:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:55:56,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:55:56,585 INFO L175 Difference]: Start difference. First operand has 195 places, 226 transitions, 2018 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:55:56,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 266 transitions, 2692 flow [2024-06-27 19:55:57,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 266 transitions, 2569 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 19:55:57,455 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 2028 flow [2024-06-27 19:55:57,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2028, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2024-06-27 19:55:57,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-27 19:55:57,455 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 2028 flow [2024-06-27 19:55:57,455 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 19:55:57,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:57,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:57,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:55:57,456 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 19:55:57,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash -312961142, now seen corresponding path program 5 times [2024-06-27 19:55:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324186956] [2024-06-27 19:55:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:58,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:58,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324186956] [2024-06-27 19:55:58,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324186956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:58,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:58,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:55:58,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029810751] [2024-06-27 19:55:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:55:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:55:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:55:58,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:58,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 2028 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 19:55:58,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:58,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:58,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:59,861 INFO L124 PetriNetUnfolderBase]: 2936/4486 cut-off events. [2024-06-27 19:55:59,861 INFO L125 PetriNetUnfolderBase]: For 714601/714639 co-relation queries the response was YES. [2024-06-27 19:55:59,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44326 conditions, 4486 events. 2936/4486 cut-off events. For 714601/714639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23248 event pairs, 743 based on Foata normal form. 4/4471 useless extension candidates. Maximal degree in co-relation 44232. Up to 4192 conditions per place. [2024-06-27 19:55:59,909 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 22 changer transitions 0/268 dead transitions. [2024-06-27 19:55:59,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 268 transitions, 2710 flow [2024-06-27 19:55:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:55:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:55:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 19:55:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 19:55:59,910 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 2028 flow. Second operand 10 states and 188 transitions. [2024-06-27 19:55:59,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 268 transitions, 2710 flow [2024-06-27 19:56:00,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 268 transitions, 2599 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:00,667 INFO L231 Difference]: Finished difference. Result has 199 places, 230 transitions, 2044 flow [2024-06-27 19:56:00,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2044, PETRI_PLACES=199, PETRI_TRANSITIONS=230} [2024-06-27 19:56:00,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-27 19:56:00,668 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 230 transitions, 2044 flow [2024-06-27 19:56:00,668 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 19:56:00,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:00,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:00,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:56:00,668 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 19:56:00,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 391546498, now seen corresponding path program 6 times [2024-06-27 19:56:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:00,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989551393] [2024-06-27 19:56:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:00,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:02,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:02,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989551393] [2024-06-27 19:56:02,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989551393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:02,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:02,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753674529] [2024-06-27 19:56:02,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:02,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:02,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 230 transitions, 2044 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 19:56:02,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:02,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:02,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:03,400 INFO L124 PetriNetUnfolderBase]: 2928/4474 cut-off events. [2024-06-27 19:56:03,400 INFO L125 PetriNetUnfolderBase]: For 726632/726670 co-relation queries the response was YES. [2024-06-27 19:56:03,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44140 conditions, 4474 events. 2928/4474 cut-off events. For 726632/726670 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23233 event pairs, 736 based on Foata normal form. 4/4459 useless extension candidates. Maximal degree in co-relation 44045. Up to 4103 conditions per place. [2024-06-27 19:56:03,443 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 226 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-27 19:56:03,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 269 transitions, 2658 flow [2024-06-27 19:56:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 19:56:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 19:56:03,444 INFO L175 Difference]: Start difference. First operand has 199 places, 230 transitions, 2044 flow. Second operand 10 states and 191 transitions. [2024-06-27 19:56:03,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 269 transitions, 2658 flow [2024-06-27 19:56:04,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 269 transitions, 2505 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:04,129 INFO L231 Difference]: Finished difference. Result has 201 places, 230 transitions, 1962 flow [2024-06-27 19:56:04,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1962, PETRI_PLACES=201, PETRI_TRANSITIONS=230} [2024-06-27 19:56:04,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 19:56:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 230 transitions, 1962 flow [2024-06-27 19:56:04,129 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 19:56:04,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:04,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:04,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:56:04,129 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 19:56:04,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash -323884278, now seen corresponding path program 7 times [2024-06-27 19:56:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:04,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704786599] [2024-06-27 19:56:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:05,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704786599] [2024-06-27 19:56:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704786599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:05,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:05,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:05,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970657000] [2024-06-27 19:56:05,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:05,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:05,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:05,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:05,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:05,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 230 transitions, 1962 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 19:56:05,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:05,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:05,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:06,693 INFO L124 PetriNetUnfolderBase]: 2945/4503 cut-off events. [2024-06-27 19:56:06,693 INFO L125 PetriNetUnfolderBase]: For 747239/747279 co-relation queries the response was YES. [2024-06-27 19:56:06,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44519 conditions, 4503 events. 2945/4503 cut-off events. For 747239/747279 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23443 event pairs, 749 based on Foata normal form. 6/4490 useless extension candidates. Maximal degree in co-relation 44423. Up to 4081 conditions per place. [2024-06-27 19:56:06,739 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 201 selfloop transitions, 55 changer transitions 0/267 dead transitions. [2024-06-27 19:56:06,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 2650 flow [2024-06-27 19:56:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:56:06,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 19:56:06,740 INFO L175 Difference]: Start difference. First operand has 201 places, 230 transitions, 1962 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:56:06,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 2650 flow [2024-06-27 19:56:07,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 267 transitions, 2548 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:07,445 INFO L231 Difference]: Finished difference. Result has 202 places, 232 transitions, 2069 flow [2024-06-27 19:56:07,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2069, PETRI_PLACES=202, PETRI_TRANSITIONS=232} [2024-06-27 19:56:07,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-27 19:56:07,446 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 232 transitions, 2069 flow [2024-06-27 19:56:07,446 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 19:56:07,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:07,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:07,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:56:07,446 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 19:56:07,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1566497795, now seen corresponding path program 2 times [2024-06-27 19:56:07,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:07,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819722213] [2024-06-27 19:56:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:07,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:08,726 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 19:56:08,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:08,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819722213] [2024-06-27 19:56:08,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819722213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:08,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:08,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:08,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386117905] [2024-06-27 19:56:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:08,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:08,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:08,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:08,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 232 transitions, 2069 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 19:56:08,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:08,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:08,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:09,833 INFO L124 PetriNetUnfolderBase]: 2989/4574 cut-off events. [2024-06-27 19:56:09,834 INFO L125 PetriNetUnfolderBase]: For 777147/777167 co-relation queries the response was YES. [2024-06-27 19:56:09,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45875 conditions, 4574 events. 2989/4574 cut-off events. For 777147/777167 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23948 event pairs, 696 based on Foata normal form. 4/4568 useless extension candidates. Maximal degree in co-relation 45779. Up to 3787 conditions per place. [2024-06-27 19:56:09,882 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 176 selfloop transitions, 98 changer transitions 0/285 dead transitions. [2024-06-27 19:56:09,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 285 transitions, 3551 flow [2024-06-27 19:56:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 19:56:09,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-27 19:56:09,883 INFO L175 Difference]: Start difference. First operand has 202 places, 232 transitions, 2069 flow. Second operand 10 states and 207 transitions. [2024-06-27 19:56:09,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 285 transitions, 3551 flow [2024-06-27 19:56:10,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 285 transitions, 3360 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:10,694 INFO L231 Difference]: Finished difference. Result has 205 places, 241 transitions, 2439 flow [2024-06-27 19:56:10,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2439, PETRI_PLACES=205, PETRI_TRANSITIONS=241} [2024-06-27 19:56:10,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-27 19:56:10,695 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 241 transitions, 2439 flow [2024-06-27 19:56:10,695 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 19:56:10,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:10,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:10,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:56:10,695 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 19:56:10,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash 221422011, now seen corresponding path program 3 times [2024-06-27 19:56:10,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:10,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147761796] [2024-06-27 19:56:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:10,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:12,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:12,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147761796] [2024-06-27 19:56:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147761796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385970483] [2024-06-27 19:56:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:12,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:12,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 241 transitions, 2439 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 19:56:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:13,082 INFO L124 PetriNetUnfolderBase]: 3011/4611 cut-off events. [2024-06-27 19:56:13,082 INFO L125 PetriNetUnfolderBase]: For 804293/804313 co-relation queries the response was YES. [2024-06-27 19:56:13,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47330 conditions, 4611 events. 3011/4611 cut-off events. For 804293/804313 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24220 event pairs, 698 based on Foata normal form. 4/4605 useless extension candidates. Maximal degree in co-relation 47232. Up to 3862 conditions per place. [2024-06-27 19:56:13,132 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 183 selfloop transitions, 92 changer transitions 0/286 dead transitions. [2024-06-27 19:56:13,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 286 transitions, 3475 flow [2024-06-27 19:56:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:56:13,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:56:13,133 INFO L175 Difference]: Start difference. First operand has 205 places, 241 transitions, 2439 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:56:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 286 transitions, 3475 flow [2024-06-27 19:56:14,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 286 transitions, 3297 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:14,028 INFO L231 Difference]: Finished difference. Result has 210 places, 244 transitions, 2567 flow [2024-06-27 19:56:14,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2567, PETRI_PLACES=210, PETRI_TRANSITIONS=244} [2024-06-27 19:56:14,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-27 19:56:14,028 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 244 transitions, 2567 flow [2024-06-27 19:56:14,028 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 19:56:14,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:14,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:56:14,029 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 19:56:14,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1566492215, now seen corresponding path program 4 times [2024-06-27 19:56:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:14,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217421935] [2024-06-27 19:56:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:15,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:15,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217421935] [2024-06-27 19:56:15,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217421935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:15,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:15,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392779935] [2024-06-27 19:56:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:15,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:15,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 244 transitions, 2567 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 19:56:15,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:15,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:15,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:16,395 INFO L124 PetriNetUnfolderBase]: 3033/4643 cut-off events. [2024-06-27 19:56:16,395 INFO L125 PetriNetUnfolderBase]: For 826386/826408 co-relation queries the response was YES. [2024-06-27 19:56:16,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48326 conditions, 4643 events. 3033/4643 cut-off events. For 826386/826408 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24430 event pairs, 698 based on Foata normal form. 4/4637 useless extension candidates. Maximal degree in co-relation 48226. Up to 3894 conditions per place. [2024-06-27 19:56:16,445 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 185 selfloop transitions, 93 changer transitions 0/289 dead transitions. [2024-06-27 19:56:16,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 289 transitions, 3585 flow [2024-06-27 19:56:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:56:16,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 19:56:16,446 INFO L175 Difference]: Start difference. First operand has 210 places, 244 transitions, 2567 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:56:16,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 289 transitions, 3585 flow [2024-06-27 19:56:17,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3352 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:17,584 INFO L231 Difference]: Finished difference. Result has 213 places, 247 transitions, 2614 flow [2024-06-27 19:56:17,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2614, PETRI_PLACES=213, PETRI_TRANSITIONS=247} [2024-06-27 19:56:17,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-27 19:56:17,585 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 247 transitions, 2614 flow [2024-06-27 19:56:17,585 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 19:56:17,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:17,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:17,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:56:17,585 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 19:56:17,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash -323676733, now seen corresponding path program 5 times [2024-06-27 19:56:17,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:17,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164121782] [2024-06-27 19:56:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:19,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164121782] [2024-06-27 19:56:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164121782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:19,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:19,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290133487] [2024-06-27 19:56:19,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:19,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:19,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 247 transitions, 2614 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 19:56:19,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:19,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:19,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:20,162 INFO L124 PetriNetUnfolderBase]: 3023/4629 cut-off events. [2024-06-27 19:56:20,162 INFO L125 PetriNetUnfolderBase]: For 838328/838350 co-relation queries the response was YES. [2024-06-27 19:56:20,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48064 conditions, 4629 events. 3023/4629 cut-off events. For 838328/838350 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24359 event pairs, 694 based on Foata normal form. 4/4623 useless extension candidates. Maximal degree in co-relation 47963. Up to 3913 conditions per place. [2024-06-27 19:56:20,209 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 184 selfloop transitions, 90 changer transitions 0/285 dead transitions. [2024-06-27 19:56:20,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 285 transitions, 3264 flow [2024-06-27 19:56:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 19:56:20,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 19:56:20,210 INFO L175 Difference]: Start difference. First operand has 213 places, 247 transitions, 2614 flow. Second operand 10 states and 199 transitions. [2024-06-27 19:56:20,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 285 transitions, 3264 flow [2024-06-27 19:56:21,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 285 transitions, 2954 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:21,262 INFO L231 Difference]: Finished difference. Result has 215 places, 247 transitions, 2492 flow [2024-06-27 19:56:21,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2492, PETRI_PLACES=215, PETRI_TRANSITIONS=247} [2024-06-27 19:56:21,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-27 19:56:21,263 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 247 transitions, 2492 flow [2024-06-27 19:56:21,263 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 19:56:21,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:21,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:21,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:56:21,263 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 19:56:21,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -329390653, now seen corresponding path program 6 times [2024-06-27 19:56:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:21,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298918031] [2024-06-27 19:56:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:22,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298918031] [2024-06-27 19:56:22,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298918031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:22,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:22,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:22,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007851205] [2024-06-27 19:56:22,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:22,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:22,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:22,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:22,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 247 transitions, 2492 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 19:56:22,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:22,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:22,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:23,756 INFO L124 PetriNetUnfolderBase]: 3045/4661 cut-off events. [2024-06-27 19:56:23,756 INFO L125 PetriNetUnfolderBase]: For 860470/860492 co-relation queries the response was YES. [2024-06-27 19:56:23,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48407 conditions, 4661 events. 3045/4661 cut-off events. For 860470/860492 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24541 event pairs, 692 based on Foata normal form. 4/4655 useless extension candidates. Maximal degree in co-relation 48305. Up to 3822 conditions per place. [2024-06-27 19:56:23,806 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 177 selfloop transitions, 110 changer transitions 0/298 dead transitions. [2024-06-27 19:56:23,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 3310 flow [2024-06-27 19:56:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:56:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:56:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-27 19:56:23,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2024-06-27 19:56:23,807 INFO L175 Difference]: Start difference. First operand has 215 places, 247 transitions, 2492 flow. Second operand 12 states and 239 transitions. [2024-06-27 19:56:23,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 3310 flow [2024-06-27 19:56:24,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 3108 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:24,936 INFO L231 Difference]: Finished difference. Result has 218 places, 250 transitions, 2643 flow [2024-06-27 19:56:24,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2643, PETRI_PLACES=218, PETRI_TRANSITIONS=250} [2024-06-27 19:56:24,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 19:56:24,937 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 250 transitions, 2643 flow [2024-06-27 19:56:24,937 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 19:56:24,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:24,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:24,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:56:24,938 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 19:56:24,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1571860330, now seen corresponding path program 8 times [2024-06-27 19:56:24,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:24,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206889186] [2024-06-27 19:56:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:26,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206889186] [2024-06-27 19:56:26,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206889186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:26,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:26,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218501585] [2024-06-27 19:56:26,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:26,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:26,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 250 transitions, 2643 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 19:56:26,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:26,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:26,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:27,358 INFO L124 PetriNetUnfolderBase]: 3062/4694 cut-off events. [2024-06-27 19:56:27,358 INFO L125 PetriNetUnfolderBase]: For 889206/889230 co-relation queries the response was YES. [2024-06-27 19:56:27,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49463 conditions, 4694 events. 3062/4694 cut-off events. For 889206/889230 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24786 event pairs, 747 based on Foata normal form. 6/4693 useless extension candidates. Maximal degree in co-relation 49360. Up to 4254 conditions per place. [2024-06-27 19:56:27,411 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 222 selfloop transitions, 54 changer transitions 0/287 dead transitions. [2024-06-27 19:56:27,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 287 transitions, 3381 flow [2024-06-27 19:56:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:56:27,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 19:56:27,412 INFO L175 Difference]: Start difference. First operand has 218 places, 250 transitions, 2643 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:56:27,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 287 transitions, 3381 flow [2024-06-27 19:56:28,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 287 transitions, 3056 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-06-27 19:56:28,566 INFO L231 Difference]: Finished difference. Result has 218 places, 252 transitions, 2535 flow [2024-06-27 19:56:28,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2535, PETRI_PLACES=218, PETRI_TRANSITIONS=252} [2024-06-27 19:56:28,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 19:56:28,566 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 252 transitions, 2535 flow [2024-06-27 19:56:28,566 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 19:56:28,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:28,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:56:28,567 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 19:56:28,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1572008200, now seen corresponding path program 9 times [2024-06-27 19:56:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:28,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144659316] [2024-06-27 19:56:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:28,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:30,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:30,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144659316] [2024-06-27 19:56:30,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144659316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:30,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:30,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:30,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167599396] [2024-06-27 19:56:30,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:30,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:30,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:30,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:30,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 252 transitions, 2535 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 19:56:30,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:30,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:30,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:31,246 INFO L124 PetriNetUnfolderBase]: 3133/4802 cut-off events. [2024-06-27 19:56:31,246 INFO L125 PetriNetUnfolderBase]: For 906643/906663 co-relation queries the response was YES. [2024-06-27 19:56:31,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50351 conditions, 4802 events. 3133/4802 cut-off events. For 906643/906663 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25416 event pairs, 705 based on Foata normal form. 6/4804 useless extension candidates. Maximal degree in co-relation 50247. Up to 4255 conditions per place. [2024-06-27 19:56:31,301 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 214 selfloop transitions, 69 changer transitions 0/294 dead transitions. [2024-06-27 19:56:31,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 294 transitions, 3671 flow [2024-06-27 19:56:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 19:56:31,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 19:56:31,302 INFO L175 Difference]: Start difference. First operand has 218 places, 252 transitions, 2535 flow. Second operand 10 states and 197 transitions. [2024-06-27 19:56:31,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 294 transitions, 3671 flow [2024-06-27 19:56:32,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 294 transitions, 3474 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:32,487 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2687 flow [2024-06-27 19:56:32,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2687, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-27 19:56:32,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-27 19:56:32,487 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2687 flow [2024-06-27 19:56:32,487 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 19:56:32,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:32,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:32,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:56:32,488 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 19:56:32,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash -329390808, now seen corresponding path program 10 times [2024-06-27 19:56:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422549738] [2024-06-27 19:56:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422549738] [2024-06-27 19:56:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422549738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:33,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:33,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965010690] [2024-06-27 19:56:33,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:33,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:33,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:34,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:34,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2687 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 19:56:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:35,083 INFO L124 PetriNetUnfolderBase]: 3126/4789 cut-off events. [2024-06-27 19:56:35,084 INFO L125 PetriNetUnfolderBase]: For 913276/913278 co-relation queries the response was YES. [2024-06-27 19:56:35,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49896 conditions, 4789 events. 3126/4789 cut-off events. For 913276/913278 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25281 event pairs, 718 based on Foata normal form. 6/4795 useless extension candidates. Maximal degree in co-relation 49791. Up to 4320 conditions per place. [2024-06-27 19:56:35,136 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 62 changer transitions 0/291 dead transitions. [2024-06-27 19:56:35,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 291 transitions, 3335 flow [2024-06-27 19:56:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 19:56:35,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 19:56:35,137 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2687 flow. Second operand 10 states and 194 transitions. [2024-06-27 19:56:35,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 291 transitions, 3335 flow [2024-06-27 19:56:36,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 291 transitions, 3083 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:36,348 INFO L231 Difference]: Finished difference. Result has 224 places, 256 transitions, 2566 flow [2024-06-27 19:56:36,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2566, PETRI_PLACES=224, PETRI_TRANSITIONS=256} [2024-06-27 19:56:36,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-27 19:56:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 256 transitions, 2566 flow [2024-06-27 19:56:36,349 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 19:56:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:56:36,349 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 19:56:36,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1476279526, now seen corresponding path program 1 times [2024-06-27 19:56:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99106680] [2024-06-27 19:56:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:37,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99106680] [2024-06-27 19:56:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99106680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:37,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:37,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394151977] [2024-06-27 19:56:37,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:37,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:37,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:37,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:37,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:37,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 256 transitions, 2566 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 19:56:37,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:37,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:38,047 INFO L124 PetriNetUnfolderBase]: 3147/4820 cut-off events. [2024-06-27 19:56:38,047 INFO L125 PetriNetUnfolderBase]: For 952712/952724 co-relation queries the response was YES. [2024-06-27 19:56:38,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49982 conditions, 4820 events. 3147/4820 cut-off events. For 952712/952724 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25190 event pairs, 834 based on Foata normal form. 14/4810 useless extension candidates. Maximal degree in co-relation 49875. Up to 4442 conditions per place. [2024-06-27 19:56:38,102 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 25 changer transitions 0/286 dead transitions. [2024-06-27 19:56:38,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 3338 flow [2024-06-27 19:56:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:56:38,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:56:38,103 INFO L175 Difference]: Start difference. First operand has 224 places, 256 transitions, 2566 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:56:38,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 3338 flow [2024-06-27 19:56:38,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 286 transitions, 3195 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:38,929 INFO L231 Difference]: Finished difference. Result has 223 places, 265 transitions, 2589 flow [2024-06-27 19:56:38,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2589, PETRI_PLACES=223, PETRI_TRANSITIONS=265} [2024-06-27 19:56:38,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-27 19:56:38,930 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 265 transitions, 2589 flow [2024-06-27 19:56:38,930 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 19:56:38,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:38,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:38,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:56:38,930 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:38,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1122628803, now seen corresponding path program 1 times [2024-06-27 19:56:38,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:38,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445938148] [2024-06-27 19:56:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445938148] [2024-06-27 19:56:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445938148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:39,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:39,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:39,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908909813] [2024-06-27 19:56:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:40,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:56:40,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 265 transitions, 2589 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:40,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:40,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:56:40,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:41,195 INFO L124 PetriNetUnfolderBase]: 3453/5180 cut-off events. [2024-06-27 19:56:41,196 INFO L125 PetriNetUnfolderBase]: For 976385/976387 co-relation queries the response was YES. [2024-06-27 19:56:41,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53299 conditions, 5180 events. 3453/5180 cut-off events. For 976385/976387 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26188 event pairs, 820 based on Foata normal form. 2/5177 useless extension candidates. Maximal degree in co-relation 53190. Up to 4952 conditions per place. [2024-06-27 19:56:41,251 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 265 selfloop transitions, 25 changer transitions 0/299 dead transitions. [2024-06-27 19:56:41,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 299 transitions, 3362 flow [2024-06-27 19:56:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 19:56:41,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 19:56:41,252 INFO L175 Difference]: Start difference. First operand has 223 places, 265 transitions, 2589 flow. Second operand 9 states and 159 transitions. [2024-06-27 19:56:41,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 299 transitions, 3362 flow [2024-06-27 19:56:42,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 299 transitions, 3321 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 19:56:42,444 INFO L231 Difference]: Finished difference. Result has 230 places, 271 transitions, 2743 flow [2024-06-27 19:56:42,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2743, PETRI_PLACES=230, PETRI_TRANSITIONS=271} [2024-06-27 19:56:42,444 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 19:56:42,444 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 271 transitions, 2743 flow [2024-06-27 19:56:42,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:42,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:42,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:42,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:56:42,444 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 19:56:42,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1276646533, now seen corresponding path program 7 times [2024-06-27 19:56:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134356315] [2024-06-27 19:56:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:42,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:43,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:43,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134356315] [2024-06-27 19:56:43,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134356315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:43,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:43,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507762992] [2024-06-27 19:56:43,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:43,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:43,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:43,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:43,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 271 transitions, 2743 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 19:56:43,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:43,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:43,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:44,907 INFO L124 PetriNetUnfolderBase]: 3227/4928 cut-off events. [2024-06-27 19:56:44,907 INFO L125 PetriNetUnfolderBase]: For 997408/997434 co-relation queries the response was YES. [2024-06-27 19:56:44,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52578 conditions, 4928 events. 3227/4928 cut-off events. For 997408/997434 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26150 event pairs, 723 based on Foata normal form. 4/4920 useless extension candidates. Maximal degree in co-relation 52466. Up to 4493 conditions per place. [2024-06-27 19:56:44,966 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 257 selfloop transitions, 41 changer transitions 0/309 dead transitions. [2024-06-27 19:56:44,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 309 transitions, 3551 flow [2024-06-27 19:56:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 19:56:44,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 19:56:44,968 INFO L175 Difference]: Start difference. First operand has 230 places, 271 transitions, 2743 flow. Second operand 10 states and 189 transitions. [2024-06-27 19:56:44,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 309 transitions, 3551 flow [2024-06-27 19:56:46,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 309 transitions, 3439 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:46,107 INFO L231 Difference]: Finished difference. Result has 233 places, 274 transitions, 2845 flow [2024-06-27 19:56:46,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2845, PETRI_PLACES=233, PETRI_TRANSITIONS=274} [2024-06-27 19:56:46,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-27 19:56:46,108 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 274 transitions, 2845 flow [2024-06-27 19:56:46,108 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 19:56:46,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:46,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:46,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:56:46,108 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 19:56:46,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1019944213, now seen corresponding path program 8 times [2024-06-27 19:56:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:46,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642044171] [2024-06-27 19:56:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:46,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:47,143 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 19:56:47,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:47,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642044171] [2024-06-27 19:56:47,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642044171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:47,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:47,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:47,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070122051] [2024-06-27 19:56:47,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:47,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:47,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:47,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:47,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:47,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:47,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 274 transitions, 2845 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 19:56:47,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:47,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:48,410 INFO L124 PetriNetUnfolderBase]: 3243/4950 cut-off events. [2024-06-27 19:56:48,411 INFO L125 PetriNetUnfolderBase]: For 1026415/1026443 co-relation queries the response was YES. [2024-06-27 19:56:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53464 conditions, 4950 events. 3243/4950 cut-off events. For 1026415/1026443 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26211 event pairs, 738 based on Foata normal form. 6/4944 useless extension candidates. Maximal degree in co-relation 53351. Up to 4542 conditions per place. [2024-06-27 19:56:48,470 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 266 selfloop transitions, 36 changer transitions 0/313 dead transitions. [2024-06-27 19:56:48,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 313 transitions, 3961 flow [2024-06-27 19:56:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 19:56:48,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 19:56:48,471 INFO L175 Difference]: Start difference. First operand has 233 places, 274 transitions, 2845 flow. Second operand 10 states and 188 transitions. [2024-06-27 19:56:48,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 313 transitions, 3961 flow [2024-06-27 19:56:49,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 313 transitions, 3771 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:49,842 INFO L231 Difference]: Finished difference. Result has 235 places, 277 transitions, 2866 flow [2024-06-27 19:56:49,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2866, PETRI_PLACES=235, PETRI_TRANSITIONS=277} [2024-06-27 19:56:49,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-27 19:56:49,842 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 277 transitions, 2866 flow [2024-06-27 19:56:49,843 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 19:56:49,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:49,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:49,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:56:49,843 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 19:56:49,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash 248554219, now seen corresponding path program 9 times [2024-06-27 19:56:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:49,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112331752] [2024-06-27 19:56:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:51,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:51,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112331752] [2024-06-27 19:56:51,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112331752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:51,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:51,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:51,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698282684] [2024-06-27 19:56:51,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:51,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:51,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:51,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:51,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:51,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 277 transitions, 2866 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 19:56:51,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:51,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:51,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:52,318 INFO L124 PetriNetUnfolderBase]: 3265/4987 cut-off events. [2024-06-27 19:56:52,319 INFO L125 PetriNetUnfolderBase]: For 1050232/1050262 co-relation queries the response was YES. [2024-06-27 19:56:52,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54250 conditions, 4987 events. 3265/4987 cut-off events. For 1050232/1050262 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26533 event pairs, 728 based on Foata normal form. 4/4979 useless extension candidates. Maximal degree in co-relation 54136. Up to 4396 conditions per place. [2024-06-27 19:56:52,370 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 239 selfloop transitions, 67 changer transitions 0/317 dead transitions. [2024-06-27 19:56:52,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 317 transitions, 4004 flow [2024-06-27 19:56:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:56:52,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:56:52,371 INFO L175 Difference]: Start difference. First operand has 235 places, 277 transitions, 2866 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:56:52,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 317 transitions, 4004 flow [2024-06-27 19:56:53,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 317 transitions, 3694 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:53,681 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 2834 flow [2024-06-27 19:56:53,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2834, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-27 19:56:53,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 19:56:53,682 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 2834 flow [2024-06-27 19:56:53,682 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 19:56:53,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:53,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:56:53,682 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 19:56:53,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1719639177, now seen corresponding path program 10 times [2024-06-27 19:56:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:53,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278401422] [2024-06-27 19:56:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:54,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:54,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278401422] [2024-06-27 19:56:54,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278401422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:54,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:54,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524185951] [2024-06-27 19:56:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:54,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:55,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:55,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 2834 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 19:56:55,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:55,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:55,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:56,286 INFO L124 PetriNetUnfolderBase]: 3319/5065 cut-off events. [2024-06-27 19:56:56,286 INFO L125 PetriNetUnfolderBase]: For 1090116/1090148 co-relation queries the response was YES. [2024-06-27 19:56:56,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55793 conditions, 5065 events. 3319/5065 cut-off events. For 1090116/1090148 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27030 event pairs, 733 based on Foata normal form. 4/5057 useless extension candidates. Maximal degree in co-relation 55678. Up to 4496 conditions per place. [2024-06-27 19:56:56,346 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 257 selfloop transitions, 61 changer transitions 0/329 dead transitions. [2024-06-27 19:56:56,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 329 transitions, 4458 flow [2024-06-27 19:56:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 19:56:56,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-27 19:56:56,347 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 2834 flow. Second operand 11 states and 211 transitions. [2024-06-27 19:56:56,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 329 transitions, 4458 flow [2024-06-27 19:56:57,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 329 transitions, 4204 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:57,360 INFO L231 Difference]: Finished difference. Result has 239 places, 286 transitions, 2988 flow [2024-06-27 19:56:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2988, PETRI_PLACES=239, PETRI_TRANSITIONS=286} [2024-06-27 19:56:57,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-27 19:56:57,361 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 286 transitions, 2988 flow [2024-06-27 19:56:57,361 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 19:56:57,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:57,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:57,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:56:57,361 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:57,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1913573007, now seen corresponding path program 11 times [2024-06-27 19:56:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587464216] [2024-06-27 19:56:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:57,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:58,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587464216] [2024-06-27 19:56:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587464216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:58,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500104826] [2024-06-27 19:56:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:58,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:58,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 286 transitions, 2988 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 19:56:58,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:58,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:58,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:59,839 INFO L124 PetriNetUnfolderBase]: 3341/5102 cut-off events. [2024-06-27 19:56:59,839 INFO L125 PetriNetUnfolderBase]: For 1122600/1122632 co-relation queries the response was YES. [2024-06-27 19:56:59,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56607 conditions, 5102 events. 3341/5102 cut-off events. For 1122600/1122632 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 27265 event pairs, 730 based on Foata normal form. 4/5094 useless extension candidates. Maximal degree in co-relation 56491. Up to 4506 conditions per place. [2024-06-27 19:56:59,902 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 250 selfloop transitions, 66 changer transitions 0/327 dead transitions. [2024-06-27 19:56:59,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4170 flow [2024-06-27 19:56:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:56:59,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 19:56:59,903 INFO L175 Difference]: Start difference. First operand has 239 places, 286 transitions, 2988 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:56:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4170 flow [2024-06-27 19:57:00,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 327 transitions, 3941 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:00,920 INFO L231 Difference]: Finished difference. Result has 243 places, 289 transitions, 3047 flow [2024-06-27 19:57:00,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3047, PETRI_PLACES=243, PETRI_TRANSITIONS=289} [2024-06-27 19:57:00,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-27 19:57:00,921 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 289 transitions, 3047 flow [2024-06-27 19:57:00,921 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 19:57:00,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:00,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:00,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:57:00,921 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:00,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:00,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1913578742, now seen corresponding path program 11 times [2024-06-27 19:57:00,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:00,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556652212] [2024-06-27 19:57:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:00,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:02,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:02,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556652212] [2024-06-27 19:57:02,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556652212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:02,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:02,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:02,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676626225] [2024-06-27 19:57:02,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:02,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:02,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:02,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:02,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 289 transitions, 3047 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 19:57:02,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:02,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:02,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:03,577 INFO L124 PetriNetUnfolderBase]: 3358/5129 cut-off events. [2024-06-27 19:57:03,577 INFO L125 PetriNetUnfolderBase]: For 1149040/1149074 co-relation queries the response was YES. [2024-06-27 19:57:03,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57361 conditions, 5129 events. 3358/5129 cut-off events. For 1149040/1149074 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27451 event pairs, 760 based on Foata normal form. 4/5121 useless extension candidates. Maximal degree in co-relation 57243. Up to 4781 conditions per place. [2024-06-27 19:57:03,742 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 278 selfloop transitions, 34 changer transitions 0/323 dead transitions. [2024-06-27 19:57:03,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 323 transitions, 3865 flow [2024-06-27 19:57:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 19:57:03,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 19:57:03,743 INFO L175 Difference]: Start difference. First operand has 243 places, 289 transitions, 3047 flow. Second operand 10 states and 186 transitions. [2024-06-27 19:57:03,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 323 transitions, 3865 flow [2024-06-27 19:57:04,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 323 transitions, 3601 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:04,958 INFO L231 Difference]: Finished difference. Result has 245 places, 291 transitions, 2976 flow [2024-06-27 19:57:04,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2976, PETRI_PLACES=245, PETRI_TRANSITIONS=291} [2024-06-27 19:57:04,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-27 19:57:04,959 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 291 transitions, 2976 flow [2024-06-27 19:57:04,959 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 19:57:04,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:04,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:04,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:57:04,959 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:04,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 248346829, now seen corresponding path program 12 times [2024-06-27 19:57:04,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:04,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225218912] [2024-06-27 19:57:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:06,154 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 19:57:06,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225218912] [2024-06-27 19:57:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225218912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:06,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:06,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639371072] [2024-06-27 19:57:06,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:06,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:06,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:06,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 291 transitions, 2976 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 19:57:06,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:06,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:07,553 INFO L124 PetriNetUnfolderBase]: 3380/5166 cut-off events. [2024-06-27 19:57:07,553 INFO L125 PetriNetUnfolderBase]: For 1178711/1178745 co-relation queries the response was YES. [2024-06-27 19:57:07,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57798 conditions, 5166 events. 3380/5166 cut-off events. For 1178711/1178745 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27730 event pairs, 730 based on Foata normal form. 4/5158 useless extension candidates. Maximal degree in co-relation 57679. Up to 4544 conditions per place. [2024-06-27 19:57:07,617 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 256 selfloop transitions, 68 changer transitions 0/335 dead transitions. [2024-06-27 19:57:07,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 335 transitions, 3886 flow [2024-06-27 19:57:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:57:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:57:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 19:57:07,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 19:57:07,618 INFO L175 Difference]: Start difference. First operand has 245 places, 291 transitions, 2976 flow. Second operand 11 states and 214 transitions. [2024-06-27 19:57:07,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 335 transitions, 3886 flow [2024-06-27 19:57:09,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 335 transitions, 3711 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:09,187 INFO L231 Difference]: Finished difference. Result has 248 places, 294 transitions, 3105 flow [2024-06-27 19:57:09,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3105, PETRI_PLACES=248, PETRI_TRANSITIONS=294} [2024-06-27 19:57:09,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 19:57:09,187 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 294 transitions, 3105 flow [2024-06-27 19:57:09,187 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 19:57:09,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:09,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:09,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:57:09,187 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:09,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 242840144, now seen corresponding path program 12 times [2024-06-27 19:57:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:09,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864392982] [2024-06-27 19:57:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:10,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:10,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864392982] [2024-06-27 19:57:10,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864392982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:10,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:10,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:10,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133150515] [2024-06-27 19:57:10,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:10,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:10,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:10,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:10,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:10,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 294 transitions, 3105 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 19:57:10,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:10,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:10,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:11,785 INFO L124 PetriNetUnfolderBase]: 3408/5209 cut-off events. [2024-06-27 19:57:11,785 INFO L125 PetriNetUnfolderBase]: For 1209110/1209146 co-relation queries the response was YES. [2024-06-27 19:57:11,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58818 conditions, 5209 events. 3408/5209 cut-off events. For 1209110/1209146 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28012 event pairs, 765 based on Foata normal form. 4/5201 useless extension candidates. Maximal degree in co-relation 58698. Up to 4820 conditions per place. [2024-06-27 19:57:11,848 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 274 selfloop transitions, 46 changer transitions 0/331 dead transitions. [2024-06-27 19:57:11,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 331 transitions, 3957 flow [2024-06-27 19:57:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 19:57:11,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 19:57:11,849 INFO L175 Difference]: Start difference. First operand has 248 places, 294 transitions, 3105 flow. Second operand 10 states and 186 transitions. [2024-06-27 19:57:11,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 331 transitions, 3957 flow [2024-06-27 19:57:12,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 331 transitions, 3679 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:12,942 INFO L231 Difference]: Finished difference. Result has 249 places, 299 transitions, 3062 flow [2024-06-27 19:57:12,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3062, PETRI_PLACES=249, PETRI_TRANSITIONS=299} [2024-06-27 19:57:12,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 19:57:12,942 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 299 transitions, 3062 flow [2024-06-27 19:57:12,942 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 19:57:12,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:12,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:12,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:57:12,943 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 19:57:12,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:12,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1919085117, now seen corresponding path program 13 times [2024-06-27 19:57:12,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069466303] [2024-06-27 19:57:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:12,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:14,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:14,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069466303] [2024-06-27 19:57:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069466303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:14,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881747808] [2024-06-27 19:57:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:14,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:14,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:14,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 299 transitions, 3062 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 19:57:14,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:14,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:14,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:15,750 INFO L124 PetriNetUnfolderBase]: 3409/5211 cut-off events. [2024-06-27 19:57:15,751 INFO L125 PetriNetUnfolderBase]: For 1187971/1187979 co-relation queries the response was YES. [2024-06-27 19:57:15,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57668 conditions, 5211 events. 3409/5211 cut-off events. For 1187971/1187979 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28050 event pairs, 716 based on Foata normal form. 4/5205 useless extension candidates. Maximal degree in co-relation 57547. Up to 4413 conditions per place. [2024-06-27 19:57:15,809 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 243 selfloop transitions, 97 changer transitions 0/351 dead transitions. [2024-06-27 19:57:15,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 351 transitions, 4352 flow [2024-06-27 19:57:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:57:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:57:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-27 19:57:15,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:57:15,810 INFO L175 Difference]: Start difference. First operand has 249 places, 299 transitions, 3062 flow. Second operand 12 states and 231 transitions. [2024-06-27 19:57:15,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 351 transitions, 4352 flow [2024-06-27 19:57:17,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 351 transitions, 4169 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:17,281 INFO L231 Difference]: Finished difference. Result has 256 places, 305 transitions, 3301 flow [2024-06-27 19:57:17,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3301, PETRI_PLACES=256, PETRI_TRANSITIONS=305} [2024-06-27 19:57:17,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-27 19:57:17,282 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 305 transitions, 3301 flow [2024-06-27 19:57:17,282 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 19:57:17,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:17,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:17,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:57:17,282 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 19:57:17,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1719639332, now seen corresponding path program 13 times [2024-06-27 19:57:17,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:17,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906872282] [2024-06-27 19:57:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:17,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:18,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:18,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906872282] [2024-06-27 19:57:18,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906872282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:18,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:18,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:18,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375303726] [2024-06-27 19:57:18,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:18,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:18,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:18,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:18,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 305 transitions, 3301 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 19:57:18,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:18,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:19,828 INFO L124 PetriNetUnfolderBase]: 3426/5233 cut-off events. [2024-06-27 19:57:19,828 INFO L125 PetriNetUnfolderBase]: For 1218038/1218046 co-relation queries the response was YES. [2024-06-27 19:57:19,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58934 conditions, 5233 events. 3426/5233 cut-off events. For 1218038/1218046 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28183 event pairs, 763 based on Foata normal form. 4/5227 useless extension candidates. Maximal degree in co-relation 58811. Up to 4930 conditions per place. [2024-06-27 19:57:19,891 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 306 selfloop transitions, 22 changer transitions 0/339 dead transitions. [2024-06-27 19:57:19,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 339 transitions, 4161 flow [2024-06-27 19:57:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 19:57:19,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-27 19:57:19,893 INFO L175 Difference]: Start difference. First operand has 256 places, 305 transitions, 3301 flow. Second operand 10 states and 182 transitions. [2024-06-27 19:57:19,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 339 transitions, 4161 flow [2024-06-27 19:57:21,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 339 transitions, 3863 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:21,120 INFO L231 Difference]: Finished difference. Result has 257 places, 307 transitions, 3182 flow [2024-06-27 19:57:21,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3182, PETRI_PLACES=257, PETRI_TRANSITIONS=307} [2024-06-27 19:57:21,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 19:57:21,120 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 307 transitions, 3182 flow [2024-06-27 19:57:21,120 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 19:57:21,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:21,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:21,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:57:21,121 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 19:57:21,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash 242984294, now seen corresponding path program 14 times [2024-06-27 19:57:21,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:21,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191422578] [2024-06-27 19:57:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:21,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:22,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191422578] [2024-06-27 19:57:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191422578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:22,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:22,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:22,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282376816] [2024-06-27 19:57:22,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:22,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:22,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:22,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:22,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 307 transitions, 3182 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 19:57:22,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:22,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:22,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:23,847 INFO L124 PetriNetUnfolderBase]: 3443/5265 cut-off events. [2024-06-27 19:57:23,847 INFO L125 PetriNetUnfolderBase]: For 1247069/1247077 co-relation queries the response was YES. [2024-06-27 19:57:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59094 conditions, 5265 events. 3443/5265 cut-off events. For 1247069/1247077 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28391 event pairs, 763 based on Foata normal form. 4/5259 useless extension candidates. Maximal degree in co-relation 58970. Up to 4912 conditions per place. [2024-06-27 19:57:23,913 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 295 selfloop transitions, 35 changer transitions 0/341 dead transitions. [2024-06-27 19:57:23,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 4050 flow [2024-06-27 19:57:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 19:57:23,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 19:57:23,922 INFO L175 Difference]: Start difference. First operand has 257 places, 307 transitions, 3182 flow. Second operand 10 states and 185 transitions. [2024-06-27 19:57:23,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 4050 flow [2024-06-27 19:57:25,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 341 transitions, 3889 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:25,522 INFO L231 Difference]: Finished difference. Result has 259 places, 309 transitions, 3230 flow [2024-06-27 19:57:25,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3230, PETRI_PLACES=259, PETRI_TRANSITIONS=309} [2024-06-27 19:57:25,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-27 19:57:25,523 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 309 transitions, 3230 flow [2024-06-27 19:57:25,523 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 19:57:25,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:25,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:25,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:57:25,523 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 19:57:25,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1276444723, now seen corresponding path program 14 times [2024-06-27 19:57:25,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:25,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956844105] [2024-06-27 19:57:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:25,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:26,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:26,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956844105] [2024-06-27 19:57:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956844105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772282300] [2024-06-27 19:57:26,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:26,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:26,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:26,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:26,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 309 transitions, 3230 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 19:57:26,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:26,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:26,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:28,099 INFO L124 PetriNetUnfolderBase]: 3433/5251 cut-off events. [2024-06-27 19:57:28,099 INFO L125 PetriNetUnfolderBase]: For 1258067/1258075 co-relation queries the response was YES. [2024-06-27 19:57:28,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58819 conditions, 5251 events. 3433/5251 cut-off events. For 1258067/1258075 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28299 event pairs, 741 based on Foata normal form. 4/5245 useless extension candidates. Maximal degree in co-relation 58694. Up to 4801 conditions per place. [2024-06-27 19:57:28,161 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 294 selfloop transitions, 39 changer transitions 0/344 dead transitions. [2024-06-27 19:57:28,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 344 transitions, 3990 flow [2024-06-27 19:57:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:57:28,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:57:28,162 INFO L175 Difference]: Start difference. First operand has 259 places, 309 transitions, 3230 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:57:28,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 344 transitions, 3990 flow [2024-06-27 19:57:30,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 344 transitions, 3705 flow, removed 99 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:30,104 INFO L231 Difference]: Finished difference. Result has 260 places, 309 transitions, 3031 flow [2024-06-27 19:57:30,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3031, PETRI_PLACES=260, PETRI_TRANSITIONS=309} [2024-06-27 19:57:30,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-27 19:57:30,104 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 309 transitions, 3031 flow [2024-06-27 19:57:30,105 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 19:57:30,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:30,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:30,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:57:30,105 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 19:57:30,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 242836424, now seen corresponding path program 15 times [2024-06-27 19:57:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:30,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836746624] [2024-06-27 19:57:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:31,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:31,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836746624] [2024-06-27 19:57:31,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836746624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:31,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:31,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:31,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916187286] [2024-06-27 19:57:31,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:31,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:31,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:31,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 309 transitions, 3031 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 19:57:31,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:31,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:31,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:32,617 INFO L124 PetriNetUnfolderBase]: 3425/5239 cut-off events. [2024-06-27 19:57:32,617 INFO L125 PetriNetUnfolderBase]: For 1263551/1263559 co-relation queries the response was YES. [2024-06-27 19:57:32,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58112 conditions, 5239 events. 3425/5239 cut-off events. For 1263551/1263559 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28237 event pairs, 754 based on Foata normal form. 4/5233 useless extension candidates. Maximal degree in co-relation 57986. Up to 4755 conditions per place. [2024-06-27 19:57:32,685 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 278 selfloop transitions, 55 changer transitions 0/344 dead transitions. [2024-06-27 19:57:32,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 344 transitions, 3911 flow [2024-06-27 19:57:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 19:57:32,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 19:57:32,687 INFO L175 Difference]: Start difference. First operand has 260 places, 309 transitions, 3031 flow. Second operand 10 states and 187 transitions. [2024-06-27 19:57:32,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 344 transitions, 3911 flow [2024-06-27 19:57:34,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 344 transitions, 3801 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:34,215 INFO L231 Difference]: Finished difference. Result has 261 places, 311 transitions, 3174 flow [2024-06-27 19:57:34,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3174, PETRI_PLACES=261, PETRI_TRANSITIONS=311} [2024-06-27 19:57:34,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 19:57:34,215 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 311 transitions, 3174 flow [2024-06-27 19:57:34,215 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 19:57:34,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:34,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:34,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:57:34,215 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 19:57:34,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash -205882054, now seen corresponding path program 2 times [2024-06-27 19:57:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:34,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601964150] [2024-06-27 19:57:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:34,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601964150] [2024-06-27 19:57:34,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601964150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:34,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:34,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:34,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708571869] [2024-06-27 19:57:34,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:34,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:35,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:35,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 311 transitions, 3174 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 19:57:35,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:35,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:35,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:36,085 INFO L124 PetriNetUnfolderBase]: 3503/5346 cut-off events. [2024-06-27 19:57:36,085 INFO L125 PetriNetUnfolderBase]: For 1310031/1310051 co-relation queries the response was YES. [2024-06-27 19:57:36,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58803 conditions, 5346 events. 3503/5346 cut-off events. For 1310031/1310051 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28390 event pairs, 885 based on Foata normal form. 11/5320 useless extension candidates. Maximal degree in co-relation 58676. Up to 4938 conditions per place. [2024-06-27 19:57:36,157 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 258 selfloop transitions, 19 changer transitions 0/329 dead transitions. [2024-06-27 19:57:36,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 329 transitions, 3988 flow [2024-06-27 19:57:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 19:57:36,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-27 19:57:36,158 INFO L175 Difference]: Start difference. First operand has 261 places, 311 transitions, 3174 flow. Second operand 7 states and 128 transitions. [2024-06-27 19:57:36,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 329 transitions, 3988 flow [2024-06-27 19:57:37,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 329 transitions, 3753 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:37,727 INFO L231 Difference]: Finished difference. Result has 260 places, 314 transitions, 3029 flow [2024-06-27 19:57:37,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3029, PETRI_PLACES=260, PETRI_TRANSITIONS=314} [2024-06-27 19:57:37,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-27 19:57:37,727 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 314 transitions, 3029 flow [2024-06-27 19:57:37,727 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 19:57:37,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:37,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:57:37,728 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 19:57:37,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash -205406824, now seen corresponding path program 3 times [2024-06-27 19:57:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:37,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684803810] [2024-06-27 19:57:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:38,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:38,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684803810] [2024-06-27 19:57:38,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684803810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:38,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:38,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:38,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847606914] [2024-06-27 19:57:38,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:38,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:38,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:38,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:38,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 314 transitions, 3029 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 19:57:38,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:38,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:38,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:39,480 INFO L124 PetriNetUnfolderBase]: 3486/5323 cut-off events. [2024-06-27 19:57:39,480 INFO L125 PetriNetUnfolderBase]: For 1317047/1317067 co-relation queries the response was YES. [2024-06-27 19:57:39,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57928 conditions, 5323 events. 3486/5323 cut-off events. For 1317047/1317067 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28238 event pairs, 879 based on Foata normal form. 12/5300 useless extension candidates. Maximal degree in co-relation 57800. Up to 4939 conditions per place. [2024-06-27 19:57:39,548 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 260 selfloop transitions, 14 changer transitions 0/326 dead transitions. [2024-06-27 19:57:39,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 326 transitions, 3607 flow [2024-06-27 19:57:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 19:57:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-27 19:57:39,549 INFO L175 Difference]: Start difference. First operand has 260 places, 314 transitions, 3029 flow. Second operand 7 states and 123 transitions. [2024-06-27 19:57:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 326 transitions, 3607 flow [2024-06-27 19:57:41,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 326 transitions, 3499 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:41,046 INFO L231 Difference]: Finished difference. Result has 262 places, 314 transitions, 2955 flow [2024-06-27 19:57:41,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2955, PETRI_PLACES=262, PETRI_TRANSITIONS=314} [2024-06-27 19:57:41,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-27 19:57:41,047 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 314 transitions, 2955 flow [2024-06-27 19:57:41,047 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 19:57:41,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:41,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:41,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:57:41,047 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:41,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1794431704, now seen corresponding path program 1 times [2024-06-27 19:57:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:41,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101044674] [2024-06-27 19:57:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:41,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:41,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101044674] [2024-06-27 19:57:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101044674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:41,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:41,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:41,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730678187] [2024-06-27 19:57:41,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:41,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:41,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:41,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:57:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 314 transitions, 2955 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:57:41,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:42,941 INFO L124 PetriNetUnfolderBase]: 3951/5835 cut-off events. [2024-06-27 19:57:42,941 INFO L125 PetriNetUnfolderBase]: For 1326541/1326541 co-relation queries the response was YES. [2024-06-27 19:57:42,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61659 conditions, 5835 events. 3951/5835 cut-off events. For 1326541/1326541 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 29271 event pairs, 936 based on Foata normal form. 1/5836 useless extension candidates. Maximal degree in co-relation 61531. Up to 5787 conditions per place. [2024-06-27 19:57:43,019 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 310 selfloop transitions, 24 changer transitions 0/337 dead transitions. [2024-06-27 19:57:43,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 337 transitions, 3977 flow [2024-06-27 19:57:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:57:43,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:57:43,020 INFO L175 Difference]: Start difference. First operand has 262 places, 314 transitions, 2955 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:57:43,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 337 transitions, 3977 flow [2024-06-27 19:57:44,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 337 transitions, 3939 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:44,297 INFO L231 Difference]: Finished difference. Result has 263 places, 320 transitions, 3109 flow [2024-06-27 19:57:44,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3109, PETRI_PLACES=263, PETRI_TRANSITIONS=320} [2024-06-27 19:57:44,297 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-27 19:57:44,297 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 320 transitions, 3109 flow [2024-06-27 19:57:44,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:44,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:44,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:44,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:57:44,298 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1298963494, now seen corresponding path program 1 times [2024-06-27 19:57:44,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982775357] [2024-06-27 19:57:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:44,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982775357] [2024-06-27 19:57:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982775357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:44,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:44,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534526317] [2024-06-27 19:57:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:45,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:45,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 320 transitions, 3109 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:45,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:45,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:45,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:46,330 INFO L124 PetriNetUnfolderBase]: 3779/5669 cut-off events. [2024-06-27 19:57:46,330 INFO L125 PetriNetUnfolderBase]: For 1352576/1352576 co-relation queries the response was YES. [2024-06-27 19:57:46,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60549 conditions, 5669 events. 3779/5669 cut-off events. For 1352576/1352576 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 29204 event pairs, 927 based on Foata normal form. 3/5672 useless extension candidates. Maximal degree in co-relation 60420. Up to 5351 conditions per place. [2024-06-27 19:57:46,393 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 25 changer transitions 0/345 dead transitions. [2024-06-27 19:57:46,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 345 transitions, 4047 flow [2024-06-27 19:57:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 19:57:46,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:57:46,394 INFO L175 Difference]: Start difference. First operand has 263 places, 320 transitions, 3109 flow. Second operand 7 states and 129 transitions. [2024-06-27 19:57:46,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 345 transitions, 4047 flow [2024-06-27 19:57:47,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 345 transitions, 3959 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:47,934 INFO L231 Difference]: Finished difference. Result has 267 places, 326 transitions, 3183 flow [2024-06-27 19:57:47,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3183, PETRI_PLACES=267, PETRI_TRANSITIONS=326} [2024-06-27 19:57:47,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-27 19:57:47,934 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 326 transitions, 3183 flow [2024-06-27 19:57:47,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:47,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:47,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:57:47,934 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:47,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1794611194, now seen corresponding path program 2 times [2024-06-27 19:57:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733993994] [2024-06-27 19:57:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:48,564 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 19:57:48,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:48,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733993994] [2024-06-27 19:57:48,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733993994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:48,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:48,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:48,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349978586] [2024-06-27 19:57:48,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:48,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:48,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:57:48,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 326 transitions, 3183 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:48,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:48,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:57:48,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:49,951 INFO L124 PetriNetUnfolderBase]: 3971/5863 cut-off events. [2024-06-27 19:57:49,951 INFO L125 PetriNetUnfolderBase]: For 1384652/1384652 co-relation queries the response was YES. [2024-06-27 19:57:49,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63228 conditions, 5863 events. 3971/5863 cut-off events. For 1384652/1384652 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 29460 event pairs, 935 based on Foata normal form. 1/5864 useless extension candidates. Maximal degree in co-relation 63097. Up to 5814 conditions per place. [2024-06-27 19:57:50,021 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 314 selfloop transitions, 26 changer transitions 0/343 dead transitions. [2024-06-27 19:57:50,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 343 transitions, 4143 flow [2024-06-27 19:57:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 19:57:50,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 19:57:50,022 INFO L175 Difference]: Start difference. First operand has 267 places, 326 transitions, 3183 flow. Second operand 7 states and 117 transitions. [2024-06-27 19:57:50,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 343 transitions, 4143 flow [2024-06-27 19:57:51,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 343 transitions, 4077 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:51,851 INFO L231 Difference]: Finished difference. Result has 271 places, 329 transitions, 3237 flow [2024-06-27 19:57:51,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3237, PETRI_PLACES=271, PETRI_TRANSITIONS=329} [2024-06-27 19:57:51,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-27 19:57:51,851 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 329 transitions, 3237 flow [2024-06-27 19:57:51,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:51,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:51,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:57:51,852 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:51,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 265297920, now seen corresponding path program 3 times [2024-06-27 19:57:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:51,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772889923] [2024-06-27 19:57:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:51,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772889923] [2024-06-27 19:57:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772889923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:52,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:52,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312306129] [2024-06-27 19:57:52,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:52,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:52,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:57:52,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 329 transitions, 3237 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:52,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:52,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:57:52,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:53,828 INFO L124 PetriNetUnfolderBase]: 3968/5861 cut-off events. [2024-06-27 19:57:53,828 INFO L125 PetriNetUnfolderBase]: For 1406739/1406741 co-relation queries the response was YES. [2024-06-27 19:57:53,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63324 conditions, 5861 events. 3968/5861 cut-off events. For 1406739/1406741 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 29424 event pairs, 942 based on Foata normal form. 3/5864 useless extension candidates. Maximal degree in co-relation 63191. Up to 5811 conditions per place. [2024-06-27 19:57:53,902 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 310 selfloop transitions, 26 changer transitions 0/339 dead transitions. [2024-06-27 19:57:53,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 339 transitions, 3933 flow [2024-06-27 19:57:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 19:57:53,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-27 19:57:53,903 INFO L175 Difference]: Start difference. First operand has 271 places, 329 transitions, 3237 flow. Second operand 7 states and 113 transitions. [2024-06-27 19:57:53,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 339 transitions, 3933 flow [2024-06-27 19:57:55,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 339 transitions, 3809 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 19:57:55,569 INFO L231 Difference]: Finished difference. Result has 274 places, 329 transitions, 3171 flow [2024-06-27 19:57:55,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3171, PETRI_PLACES=274, PETRI_TRANSITIONS=329} [2024-06-27 19:57:55,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 19:57:55,569 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 329 transitions, 3171 flow [2024-06-27 19:57:55,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:55,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:55,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:57:55,570 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:55,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash -205697542, now seen corresponding path program 2 times [2024-06-27 19:57:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:55,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700084087] [2024-06-27 19:57:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:55,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:56,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:56,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700084087] [2024-06-27 19:57:56,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700084087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:56,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:56,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986432479] [2024-06-27 19:57:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:56,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:56,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:56,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:57:56,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 329 transitions, 3171 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:56,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:56,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:57:56,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:57,504 INFO L124 PetriNetUnfolderBase]: 3796/5694 cut-off events. [2024-06-27 19:57:57,504 INFO L125 PetriNetUnfolderBase]: For 1430699/1430701 co-relation queries the response was YES. [2024-06-27 19:57:57,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61770 conditions, 5694 events. 3796/5694 cut-off events. For 1430699/1430701 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29425 event pairs, 927 based on Foata normal form. 5/5699 useless extension candidates. Maximal degree in co-relation 61636. Up to 5367 conditions per place. [2024-06-27 19:57:57,580 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 28 changer transitions 0/349 dead transitions. [2024-06-27 19:57:57,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 349 transitions, 4067 flow [2024-06-27 19:57:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 19:57:57,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:57:57,581 INFO L175 Difference]: Start difference. First operand has 274 places, 329 transitions, 3171 flow. Second operand 7 states and 126 transitions. [2024-06-27 19:57:57,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 349 transitions, 4067 flow [2024-06-27 19:57:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 349 transitions, 3983 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:59,818 INFO L231 Difference]: Finished difference. Result has 274 places, 332 transitions, 3199 flow [2024-06-27 19:57:59,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3199, PETRI_PLACES=274, PETRI_TRANSITIONS=332} [2024-06-27 19:57:59,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 19:57:59,818 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 332 transitions, 3199 flow [2024-06-27 19:57:59,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:57:59,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:59,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:57:59,819 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:59,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash -205400872, now seen corresponding path program 3 times [2024-06-27 19:57:59,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:59,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55305059] [2024-06-27 19:57:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:00,451 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 19:58:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55305059] [2024-06-27 19:58:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55305059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:00,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:00,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049379198] [2024-06-27 19:58:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:00,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:00,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 332 transitions, 3199 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:00,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:00,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:00,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:01,742 INFO L124 PetriNetUnfolderBase]: 3787/5682 cut-off events. [2024-06-27 19:58:01,743 INFO L125 PetriNetUnfolderBase]: For 1444269/1444271 co-relation queries the response was YES. [2024-06-27 19:58:01,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61711 conditions, 5682 events. 3787/5682 cut-off events. For 1444269/1444271 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 29332 event pairs, 925 based on Foata normal form. 5/5687 useless extension candidates. Maximal degree in co-relation 61576. Up to 5360 conditions per place. [2024-06-27 19:58:01,820 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 275 selfloop transitions, 29 changer transitions 0/346 dead transitions. [2024-06-27 19:58:01,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 346 transitions, 3843 flow [2024-06-27 19:58:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 19:58:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 19:58:01,821 INFO L175 Difference]: Start difference. First operand has 274 places, 332 transitions, 3199 flow. Second operand 7 states and 122 transitions. [2024-06-27 19:58:01,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 346 transitions, 3843 flow [2024-06-27 19:58:04,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 346 transitions, 3715 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:04,988 INFO L231 Difference]: Finished difference. Result has 276 places, 332 transitions, 3136 flow [2024-06-27 19:58:04,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3136, PETRI_PLACES=276, PETRI_TRANSITIONS=332} [2024-06-27 19:58:04,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-27 19:58:04,989 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 332 transitions, 3136 flow [2024-06-27 19:58:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:04,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:04,989 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 19:58:04,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:58:04,989 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 19:58:04,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:04,989 INFO L85 PathProgramCache]: Analyzing trace with hash 936151523, now seen corresponding path program 1 times [2024-06-27 19:58:04,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:04,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562037536] [2024-06-27 19:58:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:06,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562037536] [2024-06-27 19:58:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562037536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:06,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:06,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:06,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31216910] [2024-06-27 19:58:06,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:06,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:06,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 332 transitions, 3136 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 19:58:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:06,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:06,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:08,047 INFO L124 PetriNetUnfolderBase]: 3722/5672 cut-off events. [2024-06-27 19:58:08,047 INFO L125 PetriNetUnfolderBase]: For 1688696/1688702 co-relation queries the response was YES. [2024-06-27 19:58:08,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67311 conditions, 5672 events. 3722/5672 cut-off events. For 1688696/1688702 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 31108 event pairs, 685 based on Foata normal form. 16/5659 useless extension candidates. Maximal degree in co-relation 67175. Up to 4772 conditions per place. [2024-06-27 19:58:08,115 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 335 selfloop transitions, 48 changer transitions 0/397 dead transitions. [2024-06-27 19:58:08,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 397 transitions, 4698 flow [2024-06-27 19:58:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:58:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:58:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 19:58:08,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-27 19:58:08,117 INFO L175 Difference]: Start difference. First operand has 276 places, 332 transitions, 3136 flow. Second operand 12 states and 242 transitions. [2024-06-27 19:58:08,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 397 transitions, 4698 flow [2024-06-27 19:58:10,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 397 transitions, 4630 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:10,264 INFO L231 Difference]: Finished difference. Result has 282 places, 334 transitions, 3364 flow [2024-06-27 19:58:10,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3364, PETRI_PLACES=282, PETRI_TRANSITIONS=334} [2024-06-27 19:58:10,264 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 19:58:10,264 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 334 transitions, 3364 flow [2024-06-27 19:58:10,264 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 19:58:10,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:10,264 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 19:58:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:58:10,265 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 19:58:10,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash 994363943, now seen corresponding path program 2 times [2024-06-27 19:58:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:10,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439166750] [2024-06-27 19:58:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:11,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:11,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439166750] [2024-06-27 19:58:11,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439166750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:11,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:11,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:11,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62831379] [2024-06-27 19:58:11,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:11,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:11,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:11,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:11,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 334 transitions, 3364 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 19:58:11,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:11,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:11,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:13,398 INFO L124 PetriNetUnfolderBase]: 3796/5821 cut-off events. [2024-06-27 19:58:13,398 INFO L125 PetriNetUnfolderBase]: For 1734795/1734801 co-relation queries the response was YES. [2024-06-27 19:58:13,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68937 conditions, 5821 events. 3796/5821 cut-off events. For 1734795/1734801 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32418 event pairs, 859 based on Foata normal form. 20/5818 useless extension candidates. Maximal degree in co-relation 68800. Up to 5277 conditions per place. [2024-06-27 19:58:13,475 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 340 selfloop transitions, 40 changer transitions 0/394 dead transitions. [2024-06-27 19:58:13,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 394 transitions, 4450 flow [2024-06-27 19:58:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:58:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:58:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-27 19:58:13,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 19:58:13,476 INFO L175 Difference]: Start difference. First operand has 282 places, 334 transitions, 3364 flow. Second operand 12 states and 236 transitions. [2024-06-27 19:58:13,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 394 transitions, 4450 flow [2024-06-27 19:58:15,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 394 transitions, 4312 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:15,844 INFO L231 Difference]: Finished difference. Result has 286 places, 338 transitions, 3431 flow [2024-06-27 19:58:15,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3431, PETRI_PLACES=286, PETRI_TRANSITIONS=338} [2024-06-27 19:58:15,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-27 19:58:15,845 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 338 transitions, 3431 flow [2024-06-27 19:58:15,845 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 19:58:15,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:15,845 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 19:58:15,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:58:15,845 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 19:58:15,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 860562141, now seen corresponding path program 3 times [2024-06-27 19:58:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:15,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981642342] [2024-06-27 19:58:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:15,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:17,194 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 19:58:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981642342] [2024-06-27 19:58:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981642342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:17,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:17,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:17,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129513247] [2024-06-27 19:58:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:17,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:17,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:17,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:17,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 338 transitions, 3431 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 19:58:17,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:17,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:17,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:19,031 INFO L124 PetriNetUnfolderBase]: 3940/6071 cut-off events. [2024-06-27 19:58:19,031 INFO L125 PetriNetUnfolderBase]: For 1835430/1835436 co-relation queries the response was YES. [2024-06-27 19:58:19,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72730 conditions, 6071 events. 3940/6071 cut-off events. For 1835430/1835436 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34319 event pairs, 889 based on Foata normal form. 16/6064 useless extension candidates. Maximal degree in co-relation 72591. Up to 5238 conditions per place. [2024-06-27 19:58:19,106 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 344 selfloop transitions, 45 changer transitions 0/403 dead transitions. [2024-06-27 19:58:19,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 403 transitions, 5003 flow [2024-06-27 19:58:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:58:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:58:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-27 19:58:19,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 19:58:19,109 INFO L175 Difference]: Start difference. First operand has 286 places, 338 transitions, 3431 flow. Second operand 12 states and 244 transitions. [2024-06-27 19:58:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 403 transitions, 5003 flow [2024-06-27 19:58:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 403 transitions, 4908 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:21,601 INFO L231 Difference]: Finished difference. Result has 290 places, 340 transitions, 3614 flow [2024-06-27 19:58:21,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3614, PETRI_PLACES=290, PETRI_TRANSITIONS=340} [2024-06-27 19:58:21,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-27 19:58:21,602 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 340 transitions, 3614 flow [2024-06-27 19:58:21,602 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 19:58:21,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:21,602 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 19:58:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:58:21,603 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 19:58:21,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 860677461, now seen corresponding path program 4 times [2024-06-27 19:58:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:21,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164767709] [2024-06-27 19:58:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:23,028 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 19:58:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:23,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164767709] [2024-06-27 19:58:23,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164767709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:23,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:23,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981525791] [2024-06-27 19:58:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:23,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:23,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:23,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:23,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 340 transitions, 3614 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 19:58:23,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:23,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:23,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:24,995 INFO L124 PetriNetUnfolderBase]: 4142/6429 cut-off events. [2024-06-27 19:58:24,995 INFO L125 PetriNetUnfolderBase]: For 2038913/2038919 co-relation queries the response was YES. [2024-06-27 19:58:25,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78361 conditions, 6429 events. 4142/6429 cut-off events. For 2038913/2038919 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 37179 event pairs, 931 based on Foata normal form. 32/6438 useless extension candidates. Maximal degree in co-relation 78221. Up to 5318 conditions per place. [2024-06-27 19:58:25,087 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 344 selfloop transitions, 51 changer transitions 0/409 dead transitions. [2024-06-27 19:58:25,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 409 transitions, 5330 flow [2024-06-27 19:58:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:58:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:58:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 255 transitions. [2024-06-27 19:58:25,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561717352415027 [2024-06-27 19:58:25,088 INFO L175 Difference]: Start difference. First operand has 290 places, 340 transitions, 3614 flow. Second operand 13 states and 255 transitions. [2024-06-27 19:58:25,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 409 transitions, 5330 flow [2024-06-27 19:58:27,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 409 transitions, 5187 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:27,873 INFO L231 Difference]: Finished difference. Result has 296 places, 343 transitions, 3885 flow [2024-06-27 19:58:27,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3885, PETRI_PLACES=296, PETRI_TRANSITIONS=343} [2024-06-27 19:58:27,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 19:58:27,874 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 343 transitions, 3885 flow [2024-06-27 19:58:27,874 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 19:58:27,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:27,874 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 19:58:27,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:58:27,874 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 19:58:27,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:27,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1468534305, now seen corresponding path program 1 times [2024-06-27 19:58:27,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:27,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143950528] [2024-06-27 19:58:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:27,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:28,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:28,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143950528] [2024-06-27 19:58:28,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143950528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:28,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:28,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:28,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86598912] [2024-06-27 19:58:28,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:28,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:28,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:58:28,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 343 transitions, 3885 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:28,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:28,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:58:28,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:30,333 INFO L124 PetriNetUnfolderBase]: 4504/6875 cut-off events. [2024-06-27 19:58:30,333 INFO L125 PetriNetUnfolderBase]: For 1965378/1965378 co-relation queries the response was YES. [2024-06-27 19:58:30,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81005 conditions, 6875 events. 4504/6875 cut-off events. For 1965378/1965378 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 38167 event pairs, 1170 based on Foata normal form. 1/6862 useless extension candidates. Maximal degree in co-relation 80862. Up to 6541 conditions per place. [2024-06-27 19:58:30,431 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 31 changer transitions 0/384 dead transitions. [2024-06-27 19:58:30,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 384 transitions, 5017 flow [2024-06-27 19:58:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:58:30,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:58:30,433 INFO L175 Difference]: Start difference. First operand has 296 places, 343 transitions, 3885 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:58:30,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 384 transitions, 5017 flow [2024-06-27 19:58:34,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 384 transitions, 4869 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-27 19:58:34,187 INFO L231 Difference]: Finished difference. Result has 296 places, 354 transitions, 3994 flow [2024-06-27 19:58:34,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3737, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3994, PETRI_PLACES=296, PETRI_TRANSITIONS=354} [2024-06-27 19:58:34,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-27 19:58:34,187 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 354 transitions, 3994 flow [2024-06-27 19:58:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:58:34,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:34,187 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 19:58:34,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:58:34,187 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:34,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash -746839075, now seen corresponding path program 5 times [2024-06-27 19:58:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185113096] [2024-06-27 19:58:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:35,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185113096] [2024-06-27 19:58:35,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185113096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:35,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443163340] [2024-06-27 19:58:35,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:35,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:35,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:35,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:35,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:35,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:35,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 354 transitions, 3994 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 19:58:35,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:35,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:35,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:37,478 INFO L124 PetriNetUnfolderBase]: 4250/6612 cut-off events. [2024-06-27 19:58:37,478 INFO L125 PetriNetUnfolderBase]: For 2040708/2040708 co-relation queries the response was YES. [2024-06-27 19:58:37,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80321 conditions, 6612 events. 4250/6612 cut-off events. For 2040708/2040708 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 38466 event pairs, 943 based on Foata normal form. 20/6621 useless extension candidates. Maximal degree in co-relation 80175. Up to 6051 conditions per place. [2024-06-27 19:58:37,577 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 356 selfloop transitions, 33 changer transitions 0/407 dead transitions. [2024-06-27 19:58:37,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 407 transitions, 5085 flow [2024-06-27 19:58:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:58:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:58:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 19:58:37,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:58:37,579 INFO L175 Difference]: Start difference. First operand has 296 places, 354 transitions, 3994 flow. Second operand 11 states and 215 transitions. [2024-06-27 19:58:37,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 407 transitions, 5085 flow [2024-06-27 19:58:40,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 407 transitions, 4997 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 19:58:40,456 INFO L231 Difference]: Finished difference. Result has 305 places, 358 transitions, 4100 flow [2024-06-27 19:58:40,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4100, PETRI_PLACES=305, PETRI_TRANSITIONS=358} [2024-06-27 19:58:40,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 19:58:40,457 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 358 transitions, 4100 flow [2024-06-27 19:58:40,457 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 19:58:40,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:40,457 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 19:58:40,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:58:40,457 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:40,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:40,457 INFO L85 PathProgramCache]: Analyzing trace with hash -608688593, now seen corresponding path program 6 times [2024-06-27 19:58:40,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:40,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287156529] [2024-06-27 19:58:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:40,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:41,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287156529] [2024-06-27 19:58:41,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287156529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:41,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:41,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202015241] [2024-06-27 19:58:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:42,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 358 transitions, 4100 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 19:58:42,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:42,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:43,937 INFO L124 PetriNetUnfolderBase]: 4347/6769 cut-off events. [2024-06-27 19:58:43,937 INFO L125 PetriNetUnfolderBase]: For 2100890/2100890 co-relation queries the response was YES. [2024-06-27 19:58:43,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82529 conditions, 6769 events. 4347/6769 cut-off events. For 2100890/2100890 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39735 event pairs, 963 based on Foata normal form. 20/6778 useless extension candidates. Maximal degree in co-relation 82381. Up to 6231 conditions per place. [2024-06-27 19:58:44,026 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 364 selfloop transitions, 29 changer transitions 0/411 dead transitions. [2024-06-27 19:58:44,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 411 transitions, 5207 flow [2024-06-27 19:58:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:58:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:58:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 19:58:44,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 19:58:44,027 INFO L175 Difference]: Start difference. First operand has 305 places, 358 transitions, 4100 flow. Second operand 11 states and 213 transitions. [2024-06-27 19:58:44,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 411 transitions, 5207 flow [2024-06-27 19:58:48,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 411 transitions, 5094 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:48,003 INFO L231 Difference]: Finished difference. Result has 308 places, 362 transitions, 4181 flow [2024-06-27 19:58:48,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4181, PETRI_PLACES=308, PETRI_TRANSITIONS=362} [2024-06-27 19:58:48,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-27 19:58:48,004 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 362 transitions, 4181 flow [2024-06-27 19:58:48,004 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 19:58:48,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:48,004 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 19:58:48,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:58:48,005 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:48,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash -608515613, now seen corresponding path program 7 times [2024-06-27 19:58:48,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:48,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830831990] [2024-06-27 19:58:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:49,487 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 19:58:49,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830831990] [2024-06-27 19:58:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830831990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:49,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655708004] [2024-06-27 19:58:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:49,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:49,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 362 transitions, 4181 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 19:58:49,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:49,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:49,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:51,440 INFO L124 PetriNetUnfolderBase]: 4283/6669 cut-off events. [2024-06-27 19:58:51,440 INFO L125 PetriNetUnfolderBase]: For 2034173/2034173 co-relation queries the response was YES. [2024-06-27 19:58:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77796 conditions, 6669 events. 4283/6669 cut-off events. For 2034173/2034173 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 39015 event pairs, 926 based on Foata normal form. 36/6694 useless extension candidates. Maximal degree in co-relation 77647. Up to 6071 conditions per place. [2024-06-27 19:58:51,543 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 368 selfloop transitions, 25 changer transitions 0/411 dead transitions. [2024-06-27 19:58:51,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 411 transitions, 5179 flow [2024-06-27 19:58:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:58:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:58:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 19:58:51,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-27 19:58:51,545 INFO L175 Difference]: Start difference. First operand has 308 places, 362 transitions, 4181 flow. Second operand 11 states and 211 transitions. [2024-06-27 19:58:51,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 411 transitions, 5179 flow [2024-06-27 19:58:55,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 411 transitions, 5024 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 19:58:55,215 INFO L231 Difference]: Finished difference. Result has 311 places, 362 transitions, 4085 flow [2024-06-27 19:58:55,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4085, PETRI_PLACES=311, PETRI_TRANSITIONS=362} [2024-06-27 19:58:55,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 19:58:55,216 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 362 transitions, 4085 flow [2024-06-27 19:58:55,216 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 19:58:55,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:55,216 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 19:58:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:58:55,216 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:55,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash -613277213, now seen corresponding path program 8 times [2024-06-27 19:58:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:55,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709863242] [2024-06-27 19:58:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:55,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:56,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:56,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709863242] [2024-06-27 19:58:56,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709863242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:56,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:56,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:58:56,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791203343] [2024-06-27 19:58:56,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:56,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:58:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:58:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:58:56,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:56,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 362 transitions, 4085 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 19:58:56,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:56,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:56,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:58,445 INFO L124 PetriNetUnfolderBase]: 4255/6625 cut-off events. [2024-06-27 19:58:58,446 INFO L125 PetriNetUnfolderBase]: For 1878375/1878375 co-relation queries the response was YES. [2024-06-27 19:58:58,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75191 conditions, 6625 events. 4255/6625 cut-off events. For 1878375/1878375 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38663 event pairs, 861 based on Foata normal form. 16/6630 useless extension candidates. Maximal degree in co-relation 75041. Up to 5540 conditions per place. [2024-06-27 19:58:58,540 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 353 selfloop transitions, 44 changer transitions 0/415 dead transitions. [2024-06-27 19:58:58,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 415 transitions, 5107 flow [2024-06-27 19:58:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:58:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:58:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 19:58:58,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-27 19:58:58,541 INFO L175 Difference]: Start difference. First operand has 311 places, 362 transitions, 4085 flow. Second operand 11 states and 218 transitions. [2024-06-27 19:58:58,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 415 transitions, 5107 flow [2024-06-27 19:59:02,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 415 transitions, 4969 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-27 19:59:02,247 INFO L231 Difference]: Finished difference. Result has 311 places, 362 transitions, 4041 flow [2024-06-27 19:59:02,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4041, PETRI_PLACES=311, PETRI_TRANSITIONS=362} [2024-06-27 19:59:02,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 19:59:02,247 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 362 transitions, 4041 flow [2024-06-27 19:59:02,247 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 19:59:02,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:02,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:02,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:59:02,247 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 19:59:02,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1468862595, now seen corresponding path program 2 times [2024-06-27 19:59:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:02,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260992873] [2024-06-27 19:59:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:03,329 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 19:59:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:03,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260992873] [2024-06-27 19:59:03,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260992873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:03,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:03,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468830487] [2024-06-27 19:59:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:03,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:03,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 362 transitions, 4041 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:03,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:03,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:03,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:04,861 INFO L124 PetriNetUnfolderBase]: 4652/7117 cut-off events. [2024-06-27 19:59:04,861 INFO L125 PetriNetUnfolderBase]: For 1829564/1829564 co-relation queries the response was YES. [2024-06-27 19:59:04,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76956 conditions, 7117 events. 4652/7117 cut-off events. For 1829564/1829564 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39994 event pairs, 1164 based on Foata normal form. 1/7104 useless extension candidates. Maximal degree in co-relation 76805. Up to 6803 conditions per place. [2024-06-27 19:59:04,969 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-27 19:59:04,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 391 transitions, 4880 flow [2024-06-27 19:59:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:59:04,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 19:59:04,970 INFO L175 Difference]: Start difference. First operand has 311 places, 362 transitions, 4041 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:59:04,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 391 transitions, 4880 flow [2024-06-27 19:59:08,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 391 transitions, 4678 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-27 19:59:08,306 INFO L231 Difference]: Finished difference. Result has 308 places, 368 transitions, 3992 flow [2024-06-27 19:59:08,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3992, PETRI_PLACES=308, PETRI_TRANSITIONS=368} [2024-06-27 19:59:08,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-27 19:59:08,306 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 368 transitions, 3992 flow [2024-06-27 19:59:08,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:08,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:08,306 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 19:59:08,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:59:08,307 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 19:59:08,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1472347553, now seen corresponding path program 1 times [2024-06-27 19:59:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:08,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353265601] [2024-06-27 19:59:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:09,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353265601] [2024-06-27 19:59:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353265601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:09,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:09,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129137327] [2024-06-27 19:59:09,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:09,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:09,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:09,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 368 transitions, 3992 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:09,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:09,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:09,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:10,707 INFO L124 PetriNetUnfolderBase]: 4665/7136 cut-off events. [2024-06-27 19:59:10,707 INFO L125 PetriNetUnfolderBase]: For 1856530/1856532 co-relation queries the response was YES. [2024-06-27 19:59:10,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76428 conditions, 7136 events. 4665/7136 cut-off events. For 1856530/1856532 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 40134 event pairs, 1169 based on Foata normal form. 3/7125 useless extension candidates. Maximal degree in co-relation 76278. Up to 6798 conditions per place. [2024-06-27 19:59:10,790 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 322 selfloop transitions, 34 changer transitions 0/398 dead transitions. [2024-06-27 19:59:10,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 398 transitions, 5330 flow [2024-06-27 19:59:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:59:10,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 19:59:10,791 INFO L175 Difference]: Start difference. First operand has 308 places, 368 transitions, 3992 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:59:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 398 transitions, 5330 flow [2024-06-27 19:59:13,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 398 transitions, 5232 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:13,849 INFO L231 Difference]: Finished difference. Result has 310 places, 377 transitions, 4124 flow [2024-06-27 19:59:13,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4124, PETRI_PLACES=310, PETRI_TRANSITIONS=377} [2024-06-27 19:59:13,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-27 19:59:13,850 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 377 transitions, 4124 flow [2024-06-27 19:59:13,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:13,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:13,850 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 19:59:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:59:13,850 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 19:59:13,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1655819483, now seen corresponding path program 2 times [2024-06-27 19:59:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:13,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383824245] [2024-06-27 19:59:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:14,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:14,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383824245] [2024-06-27 19:59:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383824245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:14,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:14,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:59:14,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209009504] [2024-06-27 19:59:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:14,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:59:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:59:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:59:14,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:14,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 377 transitions, 4124 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:14,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:14,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:14,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:16,152 INFO L124 PetriNetUnfolderBase]: 4678/7154 cut-off events. [2024-06-27 19:59:16,152 INFO L125 PetriNetUnfolderBase]: For 1895692/1895694 co-relation queries the response was YES. [2024-06-27 19:59:16,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77359 conditions, 7154 events. 4678/7154 cut-off events. For 1895692/1895694 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40254 event pairs, 1169 based on Foata normal form. 3/7143 useless extension candidates. Maximal degree in co-relation 77208. Up to 6813 conditions per place. [2024-06-27 19:59:16,241 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 319 selfloop transitions, 41 changer transitions 0/402 dead transitions. [2024-06-27 19:59:16,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 402 transitions, 5441 flow [2024-06-27 19:59:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:59:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:59:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 19:59:16,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-27 19:59:16,241 INFO L175 Difference]: Start difference. First operand has 310 places, 377 transitions, 4124 flow. Second operand 7 states and 128 transitions. [2024-06-27 19:59:16,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 402 transitions, 5441 flow [2024-06-27 19:59:18,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 402 transitions, 5329 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 19:59:18,936 INFO L231 Difference]: Finished difference. Result has 315 places, 384 transitions, 4225 flow [2024-06-27 19:59:18,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4225, PETRI_PLACES=315, PETRI_TRANSITIONS=384} [2024-06-27 19:59:18,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-27 19:59:18,936 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 384 transitions, 4225 flow [2024-06-27 19:59:18,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:18,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:18,936 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 19:59:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:59:18,937 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:18,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1316790139, now seen corresponding path program 9 times [2024-06-27 19:59:18,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:18,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127129645] [2024-06-27 19:59:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:20,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:20,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127129645] [2024-06-27 19:59:20,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127129645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:20,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:20,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094041194] [2024-06-27 19:59:20,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:20,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:20,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:20,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:20,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:20,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:20,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 384 transitions, 4225 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 19:59:20,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:20,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:20,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:22,225 INFO L124 PetriNetUnfolderBase]: 4365/6802 cut-off events. [2024-06-27 19:59:22,225 INFO L125 PetriNetUnfolderBase]: For 2020970/2020972 co-relation queries the response was YES. [2024-06-27 19:59:22,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76943 conditions, 6802 events. 4365/6802 cut-off events. For 2020970/2020972 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 39857 event pairs, 856 based on Foata normal form. 20/6819 useless extension candidates. Maximal degree in co-relation 76790. Up to 5755 conditions per place. [2024-06-27 19:59:22,328 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 304 selfloop transitions, 106 changer transitions 0/435 dead transitions. [2024-06-27 19:59:22,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 435 transitions, 5737 flow [2024-06-27 19:59:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:59:22,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47568710359408034 [2024-06-27 19:59:22,329 INFO L175 Difference]: Start difference. First operand has 315 places, 384 transitions, 4225 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:59:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 435 transitions, 5737 flow [2024-06-27 19:59:26,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 435 transitions, 5646 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:59:26,215 INFO L231 Difference]: Finished difference. Result has 323 places, 385 transitions, 4455 flow [2024-06-27 19:59:26,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4455, PETRI_PLACES=323, PETRI_TRANSITIONS=385} [2024-06-27 19:59:26,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 19:59:26,216 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 385 transitions, 4455 flow [2024-06-27 19:59:26,216 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 19:59:26,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:26,216 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 19:59:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:59:26,216 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:26,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1621294371, now seen corresponding path program 10 times [2024-06-27 19:59:26,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:26,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594246403] [2024-06-27 19:59:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:27,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:27,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594246403] [2024-06-27 19:59:27,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594246403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:27,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:27,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:27,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732251016] [2024-06-27 19:59:27,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:27,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:27,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 385 transitions, 4455 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 19:59:27,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:29,395 INFO L124 PetriNetUnfolderBase]: 4550/7111 cut-off events. [2024-06-27 19:59:29,396 INFO L125 PetriNetUnfolderBase]: For 2197383/2197385 co-relation queries the response was YES. [2024-06-27 19:59:29,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83980 conditions, 7111 events. 4550/7111 cut-off events. For 2197383/2197385 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42339 event pairs, 877 based on Foata normal form. 16/7124 useless extension candidates. Maximal degree in co-relation 83826. Up to 5561 conditions per place. [2024-06-27 19:59:29,499 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 294 selfloop transitions, 124 changer transitions 0/443 dead transitions. [2024-06-27 19:59:29,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 443 transitions, 6527 flow [2024-06-27 19:59:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-27 19:59:29,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904862579281184 [2024-06-27 19:59:29,501 INFO L175 Difference]: Start difference. First operand has 323 places, 385 transitions, 4455 flow. Second operand 11 states and 232 transitions. [2024-06-27 19:59:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 443 transitions, 6527 flow [2024-06-27 19:59:34,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 443 transitions, 6266 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 19:59:34,247 INFO L231 Difference]: Finished difference. Result has 325 places, 387 transitions, 4654 flow [2024-06-27 19:59:34,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4654, PETRI_PLACES=325, PETRI_TRANSITIONS=387} [2024-06-27 19:59:34,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 19:59:34,247 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 387 transitions, 4654 flow [2024-06-27 19:59:34,247 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 19:59:34,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:34,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:59:34,248 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:34,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1443796617, now seen corresponding path program 1 times [2024-06-27 19:59:34,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:34,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814974176] [2024-06-27 19:59:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:34,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:35,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:35,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814974176] [2024-06-27 19:59:35,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814974176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:35,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:35,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:35,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692245542] [2024-06-27 19:59:35,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:35,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:35,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:35,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:59:35,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 387 transitions, 4654 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:35,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:35,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:59:35,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:37,771 INFO L124 PetriNetUnfolderBase]: 5124/7815 cut-off events. [2024-06-27 19:59:37,771 INFO L125 PetriNetUnfolderBase]: For 2223336/2223338 co-relation queries the response was YES. [2024-06-27 19:59:37,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88709 conditions, 7815 events. 5124/7815 cut-off events. For 2223336/2223338 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 44552 event pairs, 1157 based on Foata normal form. 4/7814 useless extension candidates. Maximal degree in co-relation 88554. Up to 7398 conditions per place. [2024-06-27 19:59:37,869 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 48 changer transitions 0/430 dead transitions. [2024-06-27 19:59:37,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 430 transitions, 5706 flow [2024-06-27 19:59:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:59:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:59:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 19:59:37,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 19:59:37,870 INFO L175 Difference]: Start difference. First operand has 325 places, 387 transitions, 4654 flow. Second operand 10 states and 186 transitions. [2024-06-27 19:59:37,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 430 transitions, 5706 flow [2024-06-27 19:59:43,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 430 transitions, 5478 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:43,243 INFO L231 Difference]: Finished difference. Result has 329 places, 392 transitions, 4677 flow [2024-06-27 19:59:43,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4677, PETRI_PLACES=329, PETRI_TRANSITIONS=392} [2024-06-27 19:59:43,243 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 19:59:43,243 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 392 transitions, 4677 flow [2024-06-27 19:59:43,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:43,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:43,243 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 19:59:43,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:59:43,243 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:43,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1616705751, now seen corresponding path program 11 times [2024-06-27 19:59:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:43,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133267034] [2024-06-27 19:59:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:44,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:44,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133267034] [2024-06-27 19:59:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133267034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:44,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510148459] [2024-06-27 19:59:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:44,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:44,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:45,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:45,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 392 transitions, 4677 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 19:59:45,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:45,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:45,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:47,024 INFO L124 PetriNetUnfolderBase]: 4758/7458 cut-off events. [2024-06-27 19:59:47,024 INFO L125 PetriNetUnfolderBase]: For 2401456/2401458 co-relation queries the response was YES. [2024-06-27 19:59:47,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88134 conditions, 7458 events. 4758/7458 cut-off events. For 2401456/2401458 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45094 event pairs, 934 based on Foata normal form. 36/7486 useless extension candidates. Maximal degree in co-relation 87976. Up to 6338 conditions per place. [2024-06-27 19:59:47,144 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 325 selfloop transitions, 99 changer transitions 0/450 dead transitions. [2024-06-27 19:59:47,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 450 transitions, 5966 flow [2024-06-27 19:59:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:59:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:59:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-27 19:59:47,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:59:47,146 INFO L175 Difference]: Start difference. First operand has 329 places, 392 transitions, 4677 flow. Second operand 12 states and 240 transitions. [2024-06-27 19:59:47,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 450 transitions, 5966 flow [2024-06-27 19:59:51,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 450 transitions, 5761 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:51,532 INFO L231 Difference]: Finished difference. Result has 335 places, 397 transitions, 4914 flow [2024-06-27 19:59:51,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4914, PETRI_PLACES=335, PETRI_TRANSITIONS=397} [2024-06-27 19:59:51,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-27 19:59:51,533 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 397 transitions, 4914 flow [2024-06-27 19:59:51,533 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 19:59:51,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:51,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:51,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:59:51,533 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:51,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1621174401, now seen corresponding path program 12 times [2024-06-27 19:59:51,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:51,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45968090] [2024-06-27 19:59:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:51,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:52,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45968090] [2024-06-27 19:59:52,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45968090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:52,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347021646] [2024-06-27 19:59:52,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:52,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:52,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:52,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:53,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:53,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 397 transitions, 4914 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 19:59:53,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:53,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:53,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:55,001 INFO L124 PetriNetUnfolderBase]: 4792/7534 cut-off events. [2024-06-27 19:59:55,001 INFO L125 PetriNetUnfolderBase]: For 2338410/2338412 co-relation queries the response was YES. [2024-06-27 19:59:55,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88655 conditions, 7534 events. 4792/7534 cut-off events. For 2338410/2338412 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 45803 event pairs, 971 based on Foata normal form. 20/7546 useless extension candidates. Maximal degree in co-relation 88495. Up to 6351 conditions per place. [2024-06-27 19:59:55,101 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 300 selfloop transitions, 122 changer transitions 0/448 dead transitions. [2024-06-27 19:59:55,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 448 transitions, 6456 flow [2024-06-27 19:59:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 19:59:55,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799154334038055 [2024-06-27 19:59:55,102 INFO L175 Difference]: Start difference. First operand has 335 places, 397 transitions, 4914 flow. Second operand 11 states and 227 transitions. [2024-06-27 19:59:55,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 448 transitions, 6456 flow [2024-06-27 19:59:59,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 448 transitions, 6189 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-27 19:59:59,619 INFO L231 Difference]: Finished difference. Result has 337 places, 398 transitions, 4990 flow [2024-06-27 19:59:59,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4647, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4990, PETRI_PLACES=337, PETRI_TRANSITIONS=398} [2024-06-27 19:59:59,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-27 19:59:59,619 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 398 transitions, 4990 flow [2024-06-27 19:59:59,619 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 19:59:59,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:59,619 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 19:59:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:59:59,619 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:59,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1621179051, now seen corresponding path program 13 times [2024-06-27 19:59:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616540744] [2024-06-27 19:59:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616540744] [2024-06-27 20:00:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616540744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:00,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:00,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643293398] [2024-06-27 20:00:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:00,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:01,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:01,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 398 transitions, 4990 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 20:00:01,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:01,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:03,334 INFO L124 PetriNetUnfolderBase]: 4875/7671 cut-off events. [2024-06-27 20:00:03,334 INFO L125 PetriNetUnfolderBase]: For 2375718/2375720 co-relation queries the response was YES. [2024-06-27 20:00:03,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90390 conditions, 7671 events. 4875/7671 cut-off events. For 2375718/2375720 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 46936 event pairs, 973 based on Foata normal form. 16/7679 useless extension candidates. Maximal degree in co-relation 90229. Up to 6378 conditions per place. [2024-06-27 20:00:03,456 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 303 selfloop transitions, 124 changer transitions 0/453 dead transitions. [2024-06-27 20:00:03,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 453 transitions, 6584 flow [2024-06-27 20:00:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 20:00:03,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 20:00:03,457 INFO L175 Difference]: Start difference. First operand has 337 places, 398 transitions, 4990 flow. Second operand 11 states and 231 transitions. [2024-06-27 20:00:03,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 453 transitions, 6584 flow [2024-06-27 20:00:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 453 transitions, 6281 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-27 20:00:07,863 INFO L231 Difference]: Finished difference. Result has 338 places, 399 transitions, 5035 flow [2024-06-27 20:00:07,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4687, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5035, PETRI_PLACES=338, PETRI_TRANSITIONS=399} [2024-06-27 20:00:07,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 20:00:07,864 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 399 transitions, 5035 flow [2024-06-27 20:00:07,864 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 20:00:07,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:07,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:07,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:00:07,864 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:07,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1616710401, now seen corresponding path program 14 times [2024-06-27 20:00:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:07,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510638664] [2024-06-27 20:00:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:07,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:09,452 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 20:00:09,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:09,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510638664] [2024-06-27 20:00:09,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510638664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:09,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:09,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13240463] [2024-06-27 20:00:09,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:09,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:09,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:09,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:09,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:09,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 399 transitions, 5035 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 20:00:09,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:09,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:09,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:11,511 INFO L124 PetriNetUnfolderBase]: 4933/7779 cut-off events. [2024-06-27 20:00:11,512 INFO L125 PetriNetUnfolderBase]: For 2418550/2418552 co-relation queries the response was YES. [2024-06-27 20:00:11,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91453 conditions, 7779 events. 4933/7779 cut-off events. For 2418550/2418552 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 47919 event pairs, 999 based on Foata normal form. 16/7787 useless extension candidates. Maximal degree in co-relation 91292. Up to 6521 conditions per place. [2024-06-27 20:00:11,633 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 327 selfloop transitions, 100 changer transitions 0/453 dead transitions. [2024-06-27 20:00:11,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 453 transitions, 6235 flow [2024-06-27 20:00:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-27 20:00:11,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820295983086681 [2024-06-27 20:00:11,634 INFO L175 Difference]: Start difference. First operand has 338 places, 399 transitions, 5035 flow. Second operand 11 states and 228 transitions. [2024-06-27 20:00:11,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 453 transitions, 6235 flow [2024-06-27 20:00:17,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 453 transitions, 5927 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-27 20:00:17,935 INFO L231 Difference]: Finished difference. Result has 340 places, 400 transitions, 5029 flow [2024-06-27 20:00:17,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5029, PETRI_PLACES=340, PETRI_TRANSITIONS=400} [2024-06-27 20:00:17,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-27 20:00:17,935 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 400 transitions, 5029 flow [2024-06-27 20:00:17,935 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 20:00:17,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:17,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:17,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:00:17,936 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:17,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1450476621, now seen corresponding path program 15 times [2024-06-27 20:00:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:17,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250992133] [2024-06-27 20:00:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:17,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:19,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250992133] [2024-06-27 20:00:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250992133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814491964] [2024-06-27 20:00:19,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:19,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:19,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:19,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 400 transitions, 5029 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 20:00:19,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:19,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:19,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:21,757 INFO L124 PetriNetUnfolderBase]: 5070/8020 cut-off events. [2024-06-27 20:00:21,757 INFO L125 PetriNetUnfolderBase]: For 2564833/2564835 co-relation queries the response was YES. [2024-06-27 20:00:21,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95981 conditions, 8020 events. 5070/8020 cut-off events. For 2564833/2564835 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 49868 event pairs, 1019 based on Foata normal form. 16/8025 useless extension candidates. Maximal degree in co-relation 95819. Up to 6475 conditions per place. [2024-06-27 20:00:21,894 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 325 selfloop transitions, 105 changer transitions 0/456 dead transitions. [2024-06-27 20:00:21,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 456 transitions, 6767 flow [2024-06-27 20:00:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 20:00:21,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799154334038055 [2024-06-27 20:00:21,895 INFO L175 Difference]: Start difference. First operand has 340 places, 400 transitions, 5029 flow. Second operand 11 states and 227 transitions. [2024-06-27 20:00:21,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 456 transitions, 6767 flow [2024-06-27 20:00:27,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 456 transitions, 6505 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-27 20:00:27,535 INFO L231 Difference]: Finished difference. Result has 343 places, 402 transitions, 5203 flow [2024-06-27 20:00:27,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5203, PETRI_PLACES=343, PETRI_TRANSITIONS=402} [2024-06-27 20:00:27,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 20:00:27,535 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 402 transitions, 5203 flow [2024-06-27 20:00:27,535 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 20:00:27,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:27,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:00:27,536 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:27,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1450298991, now seen corresponding path program 16 times [2024-06-27 20:00:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:27,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496828025] [2024-06-27 20:00:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496828025] [2024-06-27 20:00:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496828025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513245948] [2024-06-27 20:00:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:29,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:29,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:29,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 402 transitions, 5203 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 20:00:29,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:29,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:29,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:31,377 INFO L124 PetriNetUnfolderBase]: 5212/8253 cut-off events. [2024-06-27 20:00:31,377 INFO L125 PetriNetUnfolderBase]: For 2775182/2775184 co-relation queries the response was YES. [2024-06-27 20:00:31,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99805 conditions, 8253 events. 5212/8253 cut-off events. For 2775182/2775184 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51860 event pairs, 1065 based on Foata normal form. 36/8281 useless extension candidates. Maximal degree in co-relation 99641. Up to 7150 conditions per place. [2024-06-27 20:00:31,518 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 333 selfloop transitions, 94 changer transitions 0/453 dead transitions. [2024-06-27 20:00:31,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 453 transitions, 6483 flow [2024-06-27 20:00:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 20:00:31,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 20:00:31,519 INFO L175 Difference]: Start difference. First operand has 343 places, 402 transitions, 5203 flow. Second operand 11 states and 222 transitions. [2024-06-27 20:00:31,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 453 transitions, 6483 flow [2024-06-27 20:00:38,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 453 transitions, 6197 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 20:00:38,623 INFO L231 Difference]: Finished difference. Result has 346 places, 404 transitions, 5328 flow [2024-06-27 20:00:38,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5328, PETRI_PLACES=346, PETRI_TRANSITIONS=404} [2024-06-27 20:00:38,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 20:00:38,624 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 404 transitions, 5328 flow [2024-06-27 20:00:38,624 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 20:00:38,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:38,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:38,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:00:38,624 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:38,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1444042881, now seen corresponding path program 17 times [2024-06-27 20:00:38,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:38,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603472845] [2024-06-27 20:00:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:38,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:40,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603472845] [2024-06-27 20:00:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603472845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:40,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:40,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687464993] [2024-06-27 20:00:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:40,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:40,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 404 transitions, 5328 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 20:00:40,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:40,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:40,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:42,494 INFO L124 PetriNetUnfolderBase]: 5146/8145 cut-off events. [2024-06-27 20:00:42,494 INFO L125 PetriNetUnfolderBase]: For 2596801/2596803 co-relation queries the response was YES. [2024-06-27 20:00:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93642 conditions, 8145 events. 5146/8145 cut-off events. For 2596801/2596803 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 51034 event pairs, 1022 based on Foata normal form. 40/8174 useless extension candidates. Maximal degree in co-relation 93477. Up to 7017 conditions per place. [2024-06-27 20:00:42,629 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 330 selfloop transitions, 96 changer transitions 0/452 dead transitions. [2024-06-27 20:00:42,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 452 transitions, 6392 flow [2024-06-27 20:00:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 20:00:42,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:00:42,630 INFO L175 Difference]: Start difference. First operand has 346 places, 404 transitions, 5328 flow. Second operand 11 states and 220 transitions. [2024-06-27 20:00:42,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 452 transitions, 6392 flow [2024-06-27 20:00:48,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 452 transitions, 6051 flow, removed 79 selfloop flow, removed 9 redundant places. [2024-06-27 20:00:48,592 INFO L231 Difference]: Finished difference. Result has 348 places, 404 transitions, 5188 flow [2024-06-27 20:00:48,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5188, PETRI_PLACES=348, PETRI_TRANSITIONS=404} [2024-06-27 20:00:48,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-27 20:00:48,592 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 404 transitions, 5188 flow [2024-06-27 20:00:48,593 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 20:00:48,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:48,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:00:48,593 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:48,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1479962145, now seen corresponding path program 3 times [2024-06-27 20:00:48,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:48,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170259853] [2024-06-27 20:00:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:48,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:49,830 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 20:00:49,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170259853] [2024-06-27 20:00:49,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170259853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:49,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:49,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:49,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276426236] [2024-06-27 20:00:49,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:49,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:49,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:49,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 404 transitions, 5188 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:49,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:49,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:49,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:52,089 INFO L124 PetriNetUnfolderBase]: 5626/8733 cut-off events. [2024-06-27 20:00:52,089 INFO L125 PetriNetUnfolderBase]: For 2364330/2364330 co-relation queries the response was YES. [2024-06-27 20:00:52,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95389 conditions, 8733 events. 5626/8733 cut-off events. For 2364330/2364330 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52820 event pairs, 1412 based on Foata normal form. 1/8699 useless extension candidates. Maximal degree in co-relation 95223. Up to 8419 conditions per place. [2024-06-27 20:00:52,215 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 29 changer transitions 0/424 dead transitions. [2024-06-27 20:00:52,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 424 transitions, 6058 flow [2024-06-27 20:00:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:00:52,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 20:00:52,215 INFO L175 Difference]: Start difference. First operand has 348 places, 404 transitions, 5188 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:00:52,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 424 transitions, 6058 flow [2024-06-27 20:00:56,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 424 transitions, 5839 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 20:00:56,902 INFO L231 Difference]: Finished difference. Result has 346 places, 407 transitions, 5103 flow [2024-06-27 20:00:56,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5103, PETRI_PLACES=346, PETRI_TRANSITIONS=407} [2024-06-27 20:00:56,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 20:00:56,903 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 407 transitions, 5103 flow [2024-06-27 20:00:56,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:56,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:56,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:56,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:00:56,903 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:56,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:56,903 INFO L85 PathProgramCache]: Analyzing trace with hash -214967415, now seen corresponding path program 3 times [2024-06-27 20:00:56,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:56,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295990053] [2024-06-27 20:00:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:56,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:57,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:57,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295990053] [2024-06-27 20:00:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295990053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:57,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:57,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:57,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551983492] [2024-06-27 20:00:57,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:57,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:00:57,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 407 transitions, 5103 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:57,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:57,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:00:57,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:59,967 INFO L124 PetriNetUnfolderBase]: 5619/8725 cut-off events. [2024-06-27 20:00:59,967 INFO L125 PetriNetUnfolderBase]: For 2403441/2403441 co-relation queries the response was YES. [2024-06-27 20:01:00,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95180 conditions, 8725 events. 5619/8725 cut-off events. For 2403441/2403441 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 52787 event pairs, 1402 based on Foata normal form. 1/8682 useless extension candidates. Maximal degree in co-relation 95013. Up to 8426 conditions per place. [2024-06-27 20:01:00,087 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 358 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2024-06-27 20:01:00,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 424 transitions, 6147 flow [2024-06-27 20:01:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:01:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:01:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:01:00,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-27 20:01:00,087 INFO L175 Difference]: Start difference. First operand has 346 places, 407 transitions, 5103 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:01:00,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 424 transitions, 6147 flow [2024-06-27 20:01:06,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 424 transitions, 6027 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:06,844 INFO L231 Difference]: Finished difference. Result has 348 places, 407 transitions, 5037 flow [2024-06-27 20:01:06,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5037, PETRI_PLACES=348, PETRI_TRANSITIONS=407} [2024-06-27 20:01:06,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-27 20:01:06,844 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 407 transitions, 5037 flow [2024-06-27 20:01:06,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:06,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:06,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:06,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:01:06,845 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:06,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -201634935, now seen corresponding path program 4 times [2024-06-27 20:01:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:06,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447754770] [2024-06-27 20:01:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:07,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:07,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447754770] [2024-06-27 20:01:07,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447754770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:07,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:07,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:01:07,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690836865] [2024-06-27 20:01:07,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:01:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:01:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:01:07,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:07,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 407 transitions, 5037 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:07,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:07,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:07,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:09,919 INFO L124 PetriNetUnfolderBase]: 5628/8736 cut-off events. [2024-06-27 20:01:09,919 INFO L125 PetriNetUnfolderBase]: For 2420065/2420065 co-relation queries the response was YES. [2024-06-27 20:01:10,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95147 conditions, 8736 events. 5628/8736 cut-off events. For 2420065/2420065 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52864 event pairs, 1412 based on Foata normal form. 1/8702 useless extension candidates. Maximal degree in co-relation 94979. Up to 8452 conditions per place. [2024-06-27 20:01:10,040 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 362 selfloop transitions, 19 changer transitions 0/423 dead transitions. [2024-06-27 20:01:10,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 423 transitions, 5888 flow [2024-06-27 20:01:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:01:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:01:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:01:10,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 20:01:10,041 INFO L175 Difference]: Start difference. First operand has 348 places, 407 transitions, 5037 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:01:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 423 transitions, 5888 flow [2024-06-27 20:01:16,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 423 transitions, 5790 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:16,153 INFO L231 Difference]: Finished difference. Result has 349 places, 410 transitions, 5046 flow [2024-06-27 20:01:16,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5046, PETRI_PLACES=349, PETRI_TRANSITIONS=410} [2024-06-27 20:01:16,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-27 20:01:16,153 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 410 transitions, 5046 flow [2024-06-27 20:01:16,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:16,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:16,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:16,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:01:16,153 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:16,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash 146536823, now seen corresponding path program 2 times [2024-06-27 20:01:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232724249] [2024-06-27 20:01:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232724249] [2024-06-27 20:01:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232724249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:17,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:17,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562650781] [2024-06-27 20:01:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:17,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:01:17,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 410 transitions, 5046 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:17,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:17,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:01:17,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:20,265 INFO L124 PetriNetUnfolderBase]: 5808/8951 cut-off events. [2024-06-27 20:01:20,265 INFO L125 PetriNetUnfolderBase]: For 2495594/2495594 co-relation queries the response was YES. [2024-06-27 20:01:20,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97371 conditions, 8951 events. 5808/8951 cut-off events. For 2495594/2495594 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 53494 event pairs, 1391 based on Foata normal form. 4/8955 useless extension candidates. Maximal degree in co-relation 97203. Up to 8672 conditions per place. [2024-06-27 20:01:20,390 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 397 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2024-06-27 20:01:20,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 449 transitions, 6134 flow [2024-06-27 20:01:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:01:20,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-27 20:01:20,391 INFO L175 Difference]: Start difference. First operand has 349 places, 410 transitions, 5046 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:01:20,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 449 transitions, 6134 flow [2024-06-27 20:01:27,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 449 transitions, 6074 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:27,172 INFO L231 Difference]: Finished difference. Result has 355 places, 415 transitions, 5213 flow [2024-06-27 20:01:27,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5213, PETRI_PLACES=355, PETRI_TRANSITIONS=415} [2024-06-27 20:01:27,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 20:01:27,172 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 415 transitions, 5213 flow [2024-06-27 20:01:27,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:27,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:27,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:27,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:01:27,172 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:27,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash 642368767, now seen corresponding path program 18 times [2024-06-27 20:01:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891625108] [2024-06-27 20:01:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:27,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:28,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891625108] [2024-06-27 20:01:28,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891625108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:28,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:28,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:28,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107635561] [2024-06-27 20:01:28,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:28,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:28,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:28,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:28,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 415 transitions, 5213 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 20:01:28,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:28,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:28,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:31,194 INFO L124 PetriNetUnfolderBase]: 5322/8456 cut-off events. [2024-06-27 20:01:31,194 INFO L125 PetriNetUnfolderBase]: For 2736779/2736779 co-relation queries the response was YES. [2024-06-27 20:01:31,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98968 conditions, 8456 events. 5322/8456 cut-off events. For 2736779/2736779 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53574 event pairs, 1134 based on Foata normal form. 16/8472 useless extension candidates. Maximal degree in co-relation 98798. Up to 7415 conditions per place. [2024-06-27 20:01:31,338 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 365 selfloop transitions, 78 changer transitions 0/472 dead transitions. [2024-06-27 20:01:31,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 472 transitions, 7449 flow [2024-06-27 20:01:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:01:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:01:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 20:01:31,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 20:01:31,339 INFO L175 Difference]: Start difference. First operand has 355 places, 415 transitions, 5213 flow. Second operand 11 states and 222 transitions. [2024-06-27 20:01:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 472 transitions, 7449 flow [2024-06-27 20:01:37,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 472 transitions, 7270 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:37,151 INFO L231 Difference]: Finished difference. Result has 360 places, 420 transitions, 5447 flow [2024-06-27 20:01:37,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5447, PETRI_PLACES=360, PETRI_TRANSITIONS=420} [2024-06-27 20:01:37,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-27 20:01:37,152 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 420 transitions, 5447 flow [2024-06-27 20:01:37,152 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 20:01:37,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:37,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:37,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:01:37,152 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:37,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash 642373417, now seen corresponding path program 19 times [2024-06-27 20:01:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:37,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277073234] [2024-06-27 20:01:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:38,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:38,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277073234] [2024-06-27 20:01:38,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277073234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:38,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:38,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:38,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309502767] [2024-06-27 20:01:38,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:38,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:38,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:38,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:38,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 420 transitions, 5447 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 20:01:38,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:38,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:38,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:41,284 INFO L124 PetriNetUnfolderBase]: 5419/8613 cut-off events. [2024-06-27 20:01:41,284 INFO L125 PetriNetUnfolderBase]: For 2836826/2836826 co-relation queries the response was YES. [2024-06-27 20:01:41,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101263 conditions, 8613 events. 5419/8613 cut-off events. For 2836826/2836826 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 54836 event pairs, 1173 based on Foata normal form. 20/8633 useless extension candidates. Maximal degree in co-relation 101091. Up to 7715 conditions per place. [2024-06-27 20:01:41,410 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 363 selfloop transitions, 79 changer transitions 0/471 dead transitions. [2024-06-27 20:01:41,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 471 transitions, 7104 flow [2024-06-27 20:01:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:01:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:01:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 20:01:41,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-27 20:01:41,411 INFO L175 Difference]: Start difference. First operand has 360 places, 420 transitions, 5447 flow. Second operand 11 states and 218 transitions. [2024-06-27 20:01:41,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 471 transitions, 7104 flow [2024-06-27 20:01:47,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 471 transitions, 6890 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:47,776 INFO L231 Difference]: Finished difference. Result has 365 places, 424 transitions, 5535 flow [2024-06-27 20:01:47,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5255, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5535, PETRI_PLACES=365, PETRI_TRANSITIONS=424} [2024-06-27 20:01:47,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 20:01:47,776 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 424 transitions, 5535 flow [2024-06-27 20:01:47,776 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 20:01:47,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:47,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:47,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:01:47,776 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:47,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash 642546397, now seen corresponding path program 20 times [2024-06-27 20:01:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618994560] [2024-06-27 20:01:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:49,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:49,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618994560] [2024-06-27 20:01:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618994560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:49,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604706281] [2024-06-27 20:01:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:49,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:49,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 424 transitions, 5535 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 20:01:49,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:49,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:49,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:51,989 INFO L124 PetriNetUnfolderBase]: 5441/8655 cut-off events. [2024-06-27 20:01:51,989 INFO L125 PetriNetUnfolderBase]: For 2824014/2824014 co-relation queries the response was YES. [2024-06-27 20:01:52,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99164 conditions, 8655 events. 5441/8655 cut-off events. For 2824014/2824014 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 55297 event pairs, 1171 based on Foata normal form. 36/8691 useless extension candidates. Maximal degree in co-relation 98990. Up to 7726 conditions per place. [2024-06-27 20:01:52,125 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 374 selfloop transitions, 67 changer transitions 0/470 dead transitions. [2024-06-27 20:01:52,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 470 transitions, 6735 flow [2024-06-27 20:01:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:01:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:01:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:01:52,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:01:52,126 INFO L175 Difference]: Start difference. First operand has 365 places, 424 transitions, 5535 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:01:52,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 470 transitions, 6735 flow [2024-06-27 20:01:58,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 470 transitions, 6500 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:58,213 INFO L231 Difference]: Finished difference. Result has 368 places, 425 transitions, 5559 flow [2024-06-27 20:01:58,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5559, PETRI_PLACES=368, PETRI_TRANSITIONS=425} [2024-06-27 20:01:58,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 20:01:58,214 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 425 transitions, 5559 flow [2024-06-27 20:01:58,214 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 20:01:58,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:58,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:58,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:01:58,214 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:01:58,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1061884073, now seen corresponding path program 21 times [2024-06-27 20:01:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908013792] [2024-06-27 20:01:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:59,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908013792] [2024-06-27 20:01:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908013792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:01:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423394425] [2024-06-27 20:01:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:59,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:01:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:01:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:01:59,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:59,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 425 transitions, 5559 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 20:01:59,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:59,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:59,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:02,238 INFO L124 PetriNetUnfolderBase]: 5516/8790 cut-off events. [2024-06-27 20:02:02,238 INFO L125 PetriNetUnfolderBase]: For 2775919/2775919 co-relation queries the response was YES. [2024-06-27 20:02:02,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100493 conditions, 8790 events. 5516/8790 cut-off events. For 2775919/2775919 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56400 event pairs, 1171 based on Foata normal form. 20/8810 useless extension candidates. Maximal degree in co-relation 100318. Up to 7379 conditions per place. [2024-06-27 20:02:02,520 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 342 selfloop transitions, 109 changer transitions 0/480 dead transitions. [2024-06-27 20:02:02,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 480 transitions, 6805 flow [2024-06-27 20:02:02,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:02:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:02:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-27 20:02:02,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472271914132379 [2024-06-27 20:02:02,522 INFO L175 Difference]: Start difference. First operand has 368 places, 425 transitions, 5559 flow. Second operand 13 states and 250 transitions. [2024-06-27 20:02:02,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 480 transitions, 6805 flow [2024-06-27 20:02:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 480 transitions, 6614 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 20:02:09,642 INFO L231 Difference]: Finished difference. Result has 372 places, 426 transitions, 5719 flow [2024-06-27 20:02:09,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5719, PETRI_PLACES=372, PETRI_TRANSITIONS=426} [2024-06-27 20:02:09,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 20:02:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 426 transitions, 5719 flow [2024-06-27 20:02:09,644 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 20:02:09,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:09,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:09,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:02:09,646 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:09,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 637900117, now seen corresponding path program 22 times [2024-06-27 20:02:09,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:09,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839528565] [2024-06-27 20:02:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:09,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:11,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:11,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839528565] [2024-06-27 20:02:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839528565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:11,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002459225] [2024-06-27 20:02:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:11,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:11,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:11,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:11,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:11,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 426 transitions, 5719 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 20:02:11,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:11,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:11,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:13,863 INFO L124 PetriNetUnfolderBase]: 5602/8935 cut-off events. [2024-06-27 20:02:13,863 INFO L125 PetriNetUnfolderBase]: For 2834779/2834779 co-relation queries the response was YES. [2024-06-27 20:02:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103001 conditions, 8935 events. 5602/8935 cut-off events. For 2834779/2834779 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 57573 event pairs, 1148 based on Foata normal form. 16/8951 useless extension candidates. Maximal degree in co-relation 102825. Up to 7291 conditions per place. [2024-06-27 20:02:14,003 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 340 selfloop transitions, 112 changer transitions 0/481 dead transitions. [2024-06-27 20:02:14,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 481 transitions, 6995 flow [2024-06-27 20:02:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:02:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:02:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-27 20:02:14,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 20:02:14,004 INFO L175 Difference]: Start difference. First operand has 372 places, 426 transitions, 5719 flow. Second operand 12 states and 238 transitions. [2024-06-27 20:02:14,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 481 transitions, 6995 flow [2024-06-27 20:02:20,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 481 transitions, 6719 flow, removed 33 selfloop flow, removed 12 redundant places. [2024-06-27 20:02:20,548 INFO L231 Difference]: Finished difference. Result has 372 places, 427 transitions, 5795 flow [2024-06-27 20:02:20,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5795, PETRI_PLACES=372, PETRI_TRANSITIONS=427} [2024-06-27 20:02:20,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 20:02:20,548 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 427 transitions, 5795 flow [2024-06-27 20:02:20,548 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 20:02:20,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:20,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:20,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:02:20,549 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:20,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1006354381, now seen corresponding path program 23 times [2024-06-27 20:02:20,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:20,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311017607] [2024-06-27 20:02:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:21,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311017607] [2024-06-27 20:02:21,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311017607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:21,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:21,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656153537] [2024-06-27 20:02:21,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:22,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:22,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 427 transitions, 5795 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 20:02:22,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:22,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:22,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:24,686 INFO L124 PetriNetUnfolderBase]: 5666/9050 cut-off events. [2024-06-27 20:02:24,687 INFO L125 PetriNetUnfolderBase]: For 2833220/2833220 co-relation queries the response was YES. [2024-06-27 20:02:24,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103447 conditions, 9050 events. 5666/9050 cut-off events. For 2833220/2833220 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58727 event pairs, 1266 based on Foata normal form. 24/9069 useless extension candidates. Maximal degree in co-relation 103271. Up to 8359 conditions per place. [2024-06-27 20:02:24,819 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 412 selfloop transitions, 31 changer transitions 0/472 dead transitions. [2024-06-27 20:02:24,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 472 transitions, 6999 flow [2024-06-27 20:02:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 20:02:24,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355179704016913 [2024-06-27 20:02:24,820 INFO L175 Difference]: Start difference. First operand has 372 places, 427 transitions, 5795 flow. Second operand 11 states and 206 transitions. [2024-06-27 20:02:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 472 transitions, 6999 flow [2024-06-27 20:02:30,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 472 transitions, 6687 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-27 20:02:30,898 INFO L231 Difference]: Finished difference. Result has 372 places, 428 transitions, 5673 flow [2024-06-27 20:02:30,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5483, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5673, PETRI_PLACES=372, PETRI_TRANSITIONS=428} [2024-06-27 20:02:30,898 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 20:02:30,898 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 428 transitions, 5673 flow [2024-06-27 20:02:30,898 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 20:02:30,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:30,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:30,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:02:30,898 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1222194717, now seen corresponding path program 24 times [2024-06-27 20:02:30,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:30,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876096746] [2024-06-27 20:02:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876096746] [2024-06-27 20:02:32,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876096746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:32,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:32,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598512395] [2024-06-27 20:02:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:32,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:32,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 428 transitions, 5673 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 20:02:32,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:32,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:32,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:35,043 INFO L124 PetriNetUnfolderBase]: 5826/9322 cut-off events. [2024-06-27 20:02:35,043 INFO L125 PetriNetUnfolderBase]: For 2898772/2898772 co-relation queries the response was YES. [2024-06-27 20:02:35,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107627 conditions, 9322 events. 5826/9322 cut-off events. For 2898772/2898772 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60827 event pairs, 1221 based on Foata normal form. 16/9338 useless extension candidates. Maximal degree in co-relation 107451. Up to 7164 conditions per place. [2024-06-27 20:02:35,314 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 327 selfloop transitions, 127 changer transitions 0/483 dead transitions. [2024-06-27 20:02:35,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 483 transitions, 8078 flow [2024-06-27 20:02:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 20:02:35,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 20:02:35,315 INFO L175 Difference]: Start difference. First operand has 372 places, 428 transitions, 5673 flow. Second operand 11 states and 222 transitions. [2024-06-27 20:02:35,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 483 transitions, 8078 flow [2024-06-27 20:02:41,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 483 transitions, 7867 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-27 20:02:41,792 INFO L231 Difference]: Finished difference. Result has 375 places, 431 transitions, 6127 flow [2024-06-27 20:02:41,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6127, PETRI_PLACES=375, PETRI_TRANSITIONS=431} [2024-06-27 20:02:41,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-27 20:02:41,793 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 431 transitions, 6127 flow [2024-06-27 20:02:41,793 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 20:02:41,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:41,793 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 20:02:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:02:41,793 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 20:02:41,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash 778453231, now seen corresponding path program 25 times [2024-06-27 20:02:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838536249] [2024-06-27 20:02:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:43,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:43,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838536249] [2024-06-27 20:02:43,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838536249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:43,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:43,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:43,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958704687] [2024-06-27 20:02:43,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:43,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:43,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:43,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:43,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 431 transitions, 6127 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 20:02:43,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:43,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:43,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:46,132 INFO L124 PetriNetUnfolderBase]: 5959/9555 cut-off events. [2024-06-27 20:02:46,132 INFO L125 PetriNetUnfolderBase]: For 3087390/3087390 co-relation queries the response was YES. [2024-06-27 20:02:46,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111005 conditions, 9555 events. 5959/9555 cut-off events. For 3087390/3087390 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 62915 event pairs, 1345 based on Foata normal form. 36/9591 useless extension candidates. Maximal degree in co-relation 110827. Up to 8718 conditions per place. [2024-06-27 20:02:46,280 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 404 selfloop transitions, 45 changer transitions 0/478 dead transitions. [2024-06-27 20:02:46,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 478 transitions, 7474 flow [2024-06-27 20:02:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:02:46,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-27 20:02:46,282 INFO L175 Difference]: Start difference. First operand has 375 places, 431 transitions, 6127 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:02:46,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 478 transitions, 7474 flow [2024-06-27 20:02:53,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 478 transitions, 7189 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:53,504 INFO L231 Difference]: Finished difference. Result has 379 places, 433 transitions, 6190 flow [2024-06-27 20:02:53,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6190, PETRI_PLACES=379, PETRI_TRANSITIONS=433} [2024-06-27 20:02:53,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 20:02:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 433 transitions, 6190 flow [2024-06-27 20:02:53,504 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 20:02:53,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:53,504 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 20:02:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:02:53,505 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 20:02:53,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 442112213, now seen corresponding path program 3 times [2024-06-27 20:02:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90730843] [2024-06-27 20:02:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:54,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90730843] [2024-06-27 20:02:54,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90730843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:54,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:54,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:54,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214886239] [2024-06-27 20:02:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:54,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:54,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:54,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 433 transitions, 6190 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:54,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:54,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:54,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:57,862 INFO L124 PetriNetUnfolderBase]: 6811/10606 cut-off events. [2024-06-27 20:02:57,862 INFO L125 PetriNetUnfolderBase]: For 2951985/2951985 co-relation queries the response was YES. [2024-06-27 20:02:57,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117767 conditions, 10606 events. 6811/10606 cut-off events. For 2951985/2951985 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 66565 event pairs, 1684 based on Foata normal form. 4/10610 useless extension candidates. Maximal degree in co-relation 117587. Up to 10340 conditions per place. [2024-06-27 20:02:58,019 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 420 selfloop transitions, 23 changer transitions 0/468 dead transitions. [2024-06-27 20:02:58,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 468 transitions, 7298 flow [2024-06-27 20:02:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:02:58,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-27 20:02:58,019 INFO L175 Difference]: Start difference. First operand has 379 places, 433 transitions, 6190 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:02:58,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 468 transitions, 7298 flow [2024-06-27 20:03:04,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 468 transitions, 7107 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-27 20:03:04,629 INFO L231 Difference]: Finished difference. Result has 380 places, 435 transitions, 6196 flow [2024-06-27 20:03:04,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6196, PETRI_PLACES=380, PETRI_TRANSITIONS=435} [2024-06-27 20:03:04,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 20:03:04,630 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 435 transitions, 6196 flow [2024-06-27 20:03:04,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:04,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:04,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:04,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:03:04,630 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 20:03:04,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 815036287, now seen corresponding path program 26 times [2024-06-27 20:03:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:04,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045381320] [2024-06-27 20:03:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:04,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045381320] [2024-06-27 20:03:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045381320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:06,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:06,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:03:06,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485986727] [2024-06-27 20:03:06,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:06,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:03:06,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:03:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:03:06,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:06,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 435 transitions, 6196 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 20:03:06,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:06,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:06,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:09,366 INFO L124 PetriNetUnfolderBase]: 6109/9795 cut-off events. [2024-06-27 20:03:09,367 INFO L125 PetriNetUnfolderBase]: For 3161220/3161220 co-relation queries the response was YES. [2024-06-27 20:03:09,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113041 conditions, 9795 events. 6109/9795 cut-off events. For 3161220/3161220 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 64830 event pairs, 1370 based on Foata normal form. 36/9831 useless extension candidates. Maximal degree in co-relation 112860. Up to 8846 conditions per place. [2024-06-27 20:03:09,552 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 390 selfloop transitions, 63 changer transitions 0/482 dead transitions. [2024-06-27 20:03:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 482 transitions, 7535 flow [2024-06-27 20:03:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:03:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:03:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:03:09,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:03:09,554 INFO L175 Difference]: Start difference. First operand has 380 places, 435 transitions, 6196 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:03:09,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 482 transitions, 7535 flow [2024-06-27 20:03:17,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 482 transitions, 7356 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:17,753 INFO L231 Difference]: Finished difference. Result has 383 places, 437 transitions, 6385 flow [2024-06-27 20:03:17,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6385, PETRI_PLACES=383, PETRI_TRANSITIONS=437} [2024-06-27 20:03:17,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-27 20:03:17,754 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 437 transitions, 6385 flow [2024-06-27 20:03:17,754 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 20:03:17,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:17,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:17,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:03:17,754 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 20:03:17,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash -884506289, now seen corresponding path program 4 times [2024-06-27 20:03:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328716449] [2024-06-27 20:03:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:19,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328716449] [2024-06-27 20:03:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328716449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:19,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:19,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:03:19,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965020957] [2024-06-27 20:03:19,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:19,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:03:19,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:03:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:03:19,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:19,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 437 transitions, 6385 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:19,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:19,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:19,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:22,490 INFO L124 PetriNetUnfolderBase]: 6978/10883 cut-off events. [2024-06-27 20:03:22,490 INFO L125 PetriNetUnfolderBase]: For 3060505/3060505 co-relation queries the response was YES. [2024-06-27 20:03:22,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121342 conditions, 10883 events. 6978/10883 cut-off events. For 3060505/3060505 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 69050 event pairs, 1690 based on Foata normal form. 4/10887 useless extension candidates. Maximal degree in co-relation 121160. Up to 10523 conditions per place. [2024-06-27 20:03:22,645 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 411 selfloop transitions, 41 changer transitions 0/477 dead transitions. [2024-06-27 20:03:22,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 477 transitions, 7561 flow [2024-06-27 20:03:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:03:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-27 20:03:22,646 INFO L175 Difference]: Start difference. First operand has 383 places, 437 transitions, 6385 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:03:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 477 transitions, 7561 flow [2024-06-27 20:03:30,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 477 transitions, 7324 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-27 20:03:30,236 INFO L231 Difference]: Finished difference. Result has 385 places, 442 transitions, 6423 flow [2024-06-27 20:03:30,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6423, PETRI_PLACES=385, PETRI_TRANSITIONS=442} [2024-06-27 20:03:30,236 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 20:03:30,236 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 442 transitions, 6423 flow [2024-06-27 20:03:30,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:30,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:30,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:03:30,236 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:30,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash -891186293, now seen corresponding path program 27 times [2024-06-27 20:03:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:30,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575292976] [2024-06-27 20:03:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575292976] [2024-06-27 20:03:31,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575292976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:31,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:31,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:03:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561262365] [2024-06-27 20:03:31,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:03:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:03:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:03:31,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:31,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 442 transitions, 6423 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 20:03:31,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:31,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:34,836 INFO L124 PetriNetUnfolderBase]: 6350/10201 cut-off events. [2024-06-27 20:03:34,836 INFO L125 PetriNetUnfolderBase]: For 3265175/3265175 co-relation queries the response was YES. [2024-06-27 20:03:34,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120096 conditions, 10201 events. 6350/10201 cut-off events. For 3265175/3265175 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 68090 event pairs, 1389 based on Foata normal form. 16/10217 useless extension candidates. Maximal degree in co-relation 119912. Up to 8914 conditions per place.