./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:31:04,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:31:04,369 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:31:04,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:31:04,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:31:04,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:31:04,403 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:31:04,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:31:04,404 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:31:04,407 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:31:04,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:31:04,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:31:04,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:31:04,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:31:04,410 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:31:04,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:31:04,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:31:04,410 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:31:04,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:31:04,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:31:04,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:31:04,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:31:04,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:31:04,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:31:04,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:31:04,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:31:04,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:31:04,413 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:31:04,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:31:04,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:31:04,415 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:31:04,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:31:04,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:31:04,416 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:31:04,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:31:04,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:31:04,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:31:04,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:31:04,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:31:04,417 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:31:04,417 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:31:04,417 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:31:04,417 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:31:04,417 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:31:04,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:31:04,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:31:04,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:31:04,664 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:31:04,665 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:31:04,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml [2024-06-21 17:31:04,874 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:31:04,874 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:31:04,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-21 17:31:05,874 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:31:06,112 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:31:06,118 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-21 17:31:06,135 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84d2f67e/e01f96c0c9604f58b5a2cfdf45527cb9/FLAGb71adadbf [2024-06-21 17:31:06,147 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84d2f67e/e01f96c0c9604f58b5a2cfdf45527cb9 [2024-06-21 17:31:06,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:31:06,148 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:31:06,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:31:06,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:31:06,155 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:31:06,155 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:31:04" (1/2) ... [2024-06-21 17:31:06,156 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499d675c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:31:06, skipping insertion in model container [2024-06-21 17:31:06,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:31:04" (1/2) ... [2024-06-21 17:31:06,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9720540 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:31:06, skipping insertion in model container [2024-06-21 17:31:06,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:31:06" (2/2) ... [2024-06-21 17:31:06,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499d675c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06, skipping insertion in model container [2024-06-21 17:31:06,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:31:06" (2/2) ... [2024-06-21 17:31:06,159 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:31:06,264 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:31:06,265 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:31:06,265 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:31:06,266 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:31:06,266 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:31:06,266 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-21 17:31:06,302 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:31:06,602 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:31:06,617 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:31:06,757 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:31:06,802 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:31:06,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06 WrapperNode [2024-06-21 17:31:06,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:31:06,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:31:06,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:31:06,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:31:06,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,874 INFO L138 Inliner]: procedures = 175, calls = 68, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 173 [2024-06-21 17:31:06,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:31:06,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:31:06,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:31:06,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:31:06,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,901 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,918 INFO L175 MemorySlicer]: Split 27 memory accesses to 2 slices as follows [2, 25]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 17:31:06,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,957 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:31:06,967 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:31:06,967 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:31:06,967 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:31:06,968 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (1/1) ... [2024-06-21 17:31:06,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:31:06,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:31:06,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:31:07,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:31:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:31:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:31:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:31:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:31:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:31:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:31:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:31:07,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:31:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:31:07,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:31:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:31:07,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:31:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:31:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:31:07,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:31:07,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:31:07,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:31:07,032 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:31:07,179 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:31:07,181 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:31:07,540 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:31:07,540 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:31:07,764 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:31:07,765 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:31:07,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:31:07 BoogieIcfgContainer [2024-06-21 17:31:07,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:31:07,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:31:07,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:31:07,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:31:07,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:31:04" (1/4) ... [2024-06-21 17:31:07,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6064a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:31:07, skipping insertion in model container [2024-06-21 17:31:07,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:31:06" (2/4) ... [2024-06-21 17:31:07,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6064a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:31:07, skipping insertion in model container [2024-06-21 17:31:07,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:31:06" (3/4) ... [2024-06-21 17:31:07,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6064a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:31:07, skipping insertion in model container [2024-06-21 17:31:07,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:31:07" (4/4) ... [2024-06-21 17:31:07,772 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_rmo.oepc.i [2024-06-21 17:31:07,786 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:31:07,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:31:07,787 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:31:07,830 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:31:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:31:07,889 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:31:07,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:31:07,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:31:07,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:31:07,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:31:07,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:31:07,915 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;@70abed66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:31:07,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:31:07,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:31:07,922 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:31:07,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:31:07,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:07,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:31:07,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:07,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash 572520196, now seen corresponding path program 1 times [2024-06-21 17:31:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573860499] [2024-06-21 17:31:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:09,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:09,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573860499] [2024-06-21 17:31:09,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573860499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:09,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:09,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:31:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768040884] [2024-06-21 17:31:09,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:09,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:31:09,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:31:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:31:09,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 17:31:09,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 17:31:09,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:09,883 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-21 17:31:09,883 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 17:31:09,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5945 event pairs, 479 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-21 17:31:09,895 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 17:31:09,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-21 17:31:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:31:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:31:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 17:31:09,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 17:31:09,906 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-21 17:31:09,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-21 17:31:09,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:09,911 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:31:09,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:31:09,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:31:09,915 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:31:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:09,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:09,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:09,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:31:09,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:09,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:09,917 INFO L85 PathProgramCache]: Analyzing trace with hash 436118723, now seen corresponding path program 1 times [2024-06-21 17:31:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:09,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937563885] [2024-06-21 17:31:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:09,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:12,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:12,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937563885] [2024-06-21 17:31:12,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937563885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:12,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:31:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725146487] [2024-06-21 17:31:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:12,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:31:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:31:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:31:12,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 17:31:12,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:12,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:12,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 17:31:12,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:12,544 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-21 17:31:12,545 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-21 17:31:12,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5880 event pairs, 369 based on Foata normal form. 6/1232 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-21 17:31:12,550 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 17:31:12,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-21 17:31:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:31:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:31:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 17:31:12,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 17:31:12,552 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-21 17:31:12,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-21 17:31:12,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:31:12,553 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:31:12,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:31:12,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:31:12,554 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:31:12,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:12,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:12,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:31:12,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:12,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 137620783, now seen corresponding path program 1 times [2024-06-21 17:31:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784339118] [2024-06-21 17:31:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:12,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:15,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784339118] [2024-06-21 17:31:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784339118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:31:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814202023] [2024-06-21 17:31:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:31:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:31:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:31:15,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 17:31:15,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:15,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:15,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 17:31:15,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:16,287 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-21 17:31:16,287 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-21 17:31:16,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7172 event pairs, 305 based on Foata normal form. 12/1530 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-21 17:31:16,296 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 17:31:16,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-21 17:31:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 17:31:16,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 17:31:16,301 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-21 17:31:16,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-21 17:31:16,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:16,304 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 17:31:16,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 17:31:16,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 17:31:16,306 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 17:31:16,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:16,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:16,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:31:16,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:16,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -810675488, now seen corresponding path program 1 times [2024-06-21 17:31:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:16,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291794297] [2024-06-21 17:31:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:16,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291794297] [2024-06-21 17:31:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291794297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:17,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:31:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794589468] [2024-06-21 17:31:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:31:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:31:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:31:17,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:17,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:17,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:17,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:17,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:18,302 INFO L124 PetriNetUnfolderBase]: 964/1518 cut-off events. [2024-06-21 17:31:18,302 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-21 17:31:18,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 1518 events. 964/1518 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7070 event pairs, 382 based on Foata normal form. 8/1523 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-21 17:31:18,309 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 17:31:18,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-21 17:31:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:31:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:31:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 17:31:18,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:31:18,310 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-21 17:31:18,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-21 17:31:18,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:18,313 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 17:31:18,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 17:31:18,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 17:31:18,314 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 17:31:18,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:18,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:18,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:18,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:31:18,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:18,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 638865223, now seen corresponding path program 1 times [2024-06-21 17:31:18,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886985990] [2024-06-21 17:31:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:18,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:19,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:19,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886985990] [2024-06-21 17:31:19,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886985990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:19,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:19,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:31:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215853024] [2024-06-21 17:31:19,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:31:19,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:31:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:31:19,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:31:19,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:19,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:19,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:31:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:20,872 INFO L124 PetriNetUnfolderBase]: 1112/1732 cut-off events. [2024-06-21 17:31:20,873 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-21 17:31:20,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 1732 events. 1112/1732 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8087 event pairs, 451 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-21 17:31:20,884 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-21 17:31:20,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 424 flow [2024-06-21 17:31:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:20,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:31:20,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:31:20,886 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:31:20,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 424 flow [2024-06-21 17:31:20,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 397 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:20,889 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-21 17:31:20,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 17:31:20,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 17:31:20,890 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-21 17:31:20,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:20,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:20,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:31:20,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:20,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1282349467, now seen corresponding path program 1 times [2024-06-21 17:31:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136915594] [2024-06-21 17:31:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:20,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136915594] [2024-06-21 17:31:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136915594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:23,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:23,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:31:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986075416] [2024-06-21 17:31:23,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:31:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:31:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:31:23,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:23,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:23,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:23,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:23,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:24,193 INFO L124 PetriNetUnfolderBase]: 1067/1677 cut-off events. [2024-06-21 17:31:24,193 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-21 17:31:24,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1677 events. 1067/1677 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7964 event pairs, 390 based on Foata normal form. 14/1679 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-21 17:31:24,203 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-21 17:31:24,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 535 flow [2024-06-21 17:31:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 17:31:24,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 17:31:24,204 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 118 transitions. [2024-06-21 17:31:24,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 535 flow [2024-06-21 17:31:24,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 529 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:31:24,210 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-21 17:31:24,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 17:31:24,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 17:31:24,213 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-21 17:31:24,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:24,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:24,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:24,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:31:24,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:24,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:24,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1268736127, now seen corresponding path program 2 times [2024-06-21 17:31:24,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:24,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659534778] [2024-06-21 17:31:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:24,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:26,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659534778] [2024-06-21 17:31:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659534778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:26,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:31:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997374470] [2024-06-21 17:31:26,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:31:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:31:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:31:26,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:26,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:27,238 INFO L124 PetriNetUnfolderBase]: 1082/1704 cut-off events. [2024-06-21 17:31:27,238 INFO L125 PetriNetUnfolderBase]: For 5157/5202 co-relation queries the response was YES. [2024-06-21 17:31:27,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 1704 events. 1082/1704 cut-off events. For 5157/5202 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8122 event pairs, 390 based on Foata normal form. 16/1709 useless extension candidates. Maximal degree in co-relation 6197. Up to 1574 conditions per place. [2024-06-21 17:31:27,248 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-21 17:31:27,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 535 flow [2024-06-21 17:31:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 17:31:27,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:31:27,250 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 112 transitions. [2024-06-21 17:31:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 535 flow [2024-06-21 17:31:27,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 502 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 17:31:27,255 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-21 17:31:27,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 17:31:27,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 17:31:27,257 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-21 17:31:27,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:27,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:27,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:27,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:31:27,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:27,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:27,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1343319274, now seen corresponding path program 1 times [2024-06-21 17:31:27,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:27,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590963185] [2024-06-21 17:31:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590963185] [2024-06-21 17:31:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590963185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506310534] [2024-06-21 17:31:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:29,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:29,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:29,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:29,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:30,405 INFO L124 PetriNetUnfolderBase]: 1118/1769 cut-off events. [2024-06-21 17:31:30,405 INFO L125 PetriNetUnfolderBase]: For 5970/6010 co-relation queries the response was YES. [2024-06-21 17:31:30,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6520 conditions, 1769 events. 1118/1769 cut-off events. For 5970/6010 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8475 event pairs, 385 based on Foata normal form. 16/1774 useless extension candidates. Maximal degree in co-relation 6493. Up to 1608 conditions per place. [2024-06-21 17:31:30,415 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-21 17:31:30,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 733 flow [2024-06-21 17:31:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:31:30,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:31:30,417 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:31:30,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 733 flow [2024-06-21 17:31:30,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 669 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:30,423 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 468 flow [2024-06-21 17:31:30,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-21 17:31:30,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 17:31:30,424 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 468 flow [2024-06-21 17:31:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:30,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:30,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:30,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:31:30,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:30,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -408290356, now seen corresponding path program 2 times [2024-06-21 17:31:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997957807] [2024-06-21 17:31:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:33,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:33,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997957807] [2024-06-21 17:31:33,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997957807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:33,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:33,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044484540] [2024-06-21 17:31:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:33,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:33,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:33,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:33,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:33,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:33,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:33,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:34,217 INFO L124 PetriNetUnfolderBase]: 1131/1794 cut-off events. [2024-06-21 17:31:34,217 INFO L125 PetriNetUnfolderBase]: For 7709/7762 co-relation queries the response was YES. [2024-06-21 17:31:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7122 conditions, 1794 events. 1131/1794 cut-off events. For 7709/7762 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8631 event pairs, 370 based on Foata normal form. 28/1811 useless extension candidates. Maximal degree in co-relation 7093. Up to 1610 conditions per place. [2024-06-21 17:31:34,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-21 17:31:34,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 794 flow [2024-06-21 17:31:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 17:31:34,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 17:31:34,238 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 468 flow. Second operand 7 states and 135 transitions. [2024-06-21 17:31:34,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 794 flow [2024-06-21 17:31:34,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 751 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:34,247 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 528 flow [2024-06-21 17:31:34,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-21 17:31:34,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 17:31:34,248 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 528 flow [2024-06-21 17:31:34,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:34,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:34,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:31:34,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:34,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash -408170200, now seen corresponding path program 1 times [2024-06-21 17:31:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:34,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823830800] [2024-06-21 17:31:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:34,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:36,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823830800] [2024-06-21 17:31:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823830800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:36,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:36,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:36,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122242827] [2024-06-21 17:31:36,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:36,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:31:36,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:36,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:36,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:31:36,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:38,103 INFO L124 PetriNetUnfolderBase]: 1231/1932 cut-off events. [2024-06-21 17:31:38,103 INFO L125 PetriNetUnfolderBase]: For 9720/9724 co-relation queries the response was YES. [2024-06-21 17:31:38,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1932 events. 1231/1932 cut-off events. For 9720/9724 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9212 event pairs, 407 based on Foata normal form. 6/1935 useless extension candidates. Maximal degree in co-relation 7896. Up to 1748 conditions per place. [2024-06-21 17:31:38,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-21 17:31:38,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 981 flow [2024-06-21 17:31:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:31:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 17:31:38,117 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 528 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:31:38,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 981 flow [2024-06-21 17:31:38,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 124 transitions, 896 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:38,126 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 619 flow [2024-06-21 17:31:38,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=619, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-21 17:31:38,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 17:31:38,127 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 619 flow [2024-06-21 17:31:38,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:38,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:38,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:38,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:31:38,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:38,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:38,128 INFO L85 PathProgramCache]: Analyzing trace with hash -399079630, now seen corresponding path program 3 times [2024-06-21 17:31:38,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:38,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490486781] [2024-06-21 17:31:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490486781] [2024-06-21 17:31:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490486781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:40,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:41,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:41,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695051311] [2024-06-21 17:31:41,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:41,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:41,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:41,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 619 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:41,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:41,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:41,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:42,171 INFO L124 PetriNetUnfolderBase]: 1182/1887 cut-off events. [2024-06-21 17:31:42,172 INFO L125 PetriNetUnfolderBase]: For 10037/10178 co-relation queries the response was YES. [2024-06-21 17:31:42,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7868 conditions, 1887 events. 1182/1887 cut-off events. For 10037/10178 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9291 event pairs, 354 based on Foata normal form. 36/1878 useless extension candidates. Maximal degree in co-relation 7835. Up to 1589 conditions per place. [2024-06-21 17:31:42,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 44 changer transitions 0/127 dead transitions. [2024-06-21 17:31:42,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1021 flow [2024-06-21 17:31:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 17:31:42,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 17:31:42,185 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 619 flow. Second operand 7 states and 137 transitions. [2024-06-21 17:31:42,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1021 flow [2024-06-21 17:31:42,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 991 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:42,193 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 748 flow [2024-06-21 17:31:42,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=748, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2024-06-21 17:31:42,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 17:31:42,194 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 748 flow [2024-06-21 17:31:42,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:42,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:42,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:42,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:31:42,195 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)] === [2024-06-21 17:31:42,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -668962858, now seen corresponding path program 2 times [2024-06-21 17:31:42,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:42,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452229735] [2024-06-21 17:31:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:44,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:44,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452229735] [2024-06-21 17:31:44,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452229735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441787628] [2024-06-21 17:31:44,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:44,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:44,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:31:44,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 748 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:44,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:44,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:31:44,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:45,649 INFO L124 PetriNetUnfolderBase]: 1262/1987 cut-off events. [2024-06-21 17:31:45,649 INFO L125 PetriNetUnfolderBase]: For 12049/12068 co-relation queries the response was YES. [2024-06-21 17:31:45,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1987 events. 1262/1987 cut-off events. For 12049/12068 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9579 event pairs, 404 based on Foata normal form. 16/1999 useless extension candidates. Maximal degree in co-relation 8641. Up to 1788 conditions per place. [2024-06-21 17:31:45,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 27 changer transitions 0/131 dead transitions. [2024-06-21 17:31:45,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 1155 flow [2024-06-21 17:31:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:31:45,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:31:45,662 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 748 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:31:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 1155 flow [2024-06-21 17:31:45,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 131 transitions, 1104 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:45,676 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 799 flow [2024-06-21 17:31:45,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=799, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-21 17:31:45,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 17:31:45,677 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 799 flow [2024-06-21 17:31:45,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:45,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:45,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:31:45,677 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)] === [2024-06-21 17:31:45,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash -231038866, now seen corresponding path program 4 times [2024-06-21 17:31:45,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821322723] [2024-06-21 17:31:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:48,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821322723] [2024-06-21 17:31:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821322723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:48,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:48,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:48,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712945460] [2024-06-21 17:31:48,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:48,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:48,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:31:48,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 799 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:48,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:48,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:31:48,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:49,118 INFO L124 PetriNetUnfolderBase]: 1189/1900 cut-off events. [2024-06-21 17:31:49,118 INFO L125 PetriNetUnfolderBase]: For 14033/14146 co-relation queries the response was YES. [2024-06-21 17:31:49,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 1900 events. 1189/1900 cut-off events. For 14033/14146 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9313 event pairs, 365 based on Foata normal form. 22/1875 useless extension candidates. Maximal degree in co-relation 8636. Up to 1598 conditions per place. [2024-06-21 17:31:49,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 45 changer transitions 0/127 dead transitions. [2024-06-21 17:31:49,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 127 transitions, 1093 flow [2024-06-21 17:31:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:31:49,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 17:31:49,133 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 799 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:31:49,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 127 transitions, 1093 flow [2024-06-21 17:31:49,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 1040 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:49,143 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 845 flow [2024-06-21 17:31:49,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-21 17:31:49,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 17:31:49,144 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 845 flow [2024-06-21 17:31:49,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:49,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:49,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:49,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:31:49,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:49,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash -230801530, now seen corresponding path program 3 times [2024-06-21 17:31:49,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:49,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187814894] [2024-06-21 17:31:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:51,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:51,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187814894] [2024-06-21 17:31:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187814894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:51,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844073242] [2024-06-21 17:31:51,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:51,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:51,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:51,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:31:51,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 845 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:51,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:51,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:31:51,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:52,455 INFO L124 PetriNetUnfolderBase]: 1249/1969 cut-off events. [2024-06-21 17:31:52,455 INFO L125 PetriNetUnfolderBase]: For 15428/15447 co-relation queries the response was YES. [2024-06-21 17:31:52,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8999 conditions, 1969 events. 1249/1969 cut-off events. For 15428/15447 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9503 event pairs, 403 based on Foata normal form. 16/1981 useless extension candidates. Maximal degree in co-relation 8960. Up to 1772 conditions per place. [2024-06-21 17:31:52,478 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-21 17:31:52,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1182 flow [2024-06-21 17:31:52,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:31:52,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:31:52,480 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 845 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:31:52,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1182 flow [2024-06-21 17:31:52,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1062 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:52,492 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 798 flow [2024-06-21 17:31:52,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-21 17:31:52,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 17:31:52,493 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 798 flow [2024-06-21 17:31:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:52,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:52,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:31:52,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:52,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash -230792602, now seen corresponding path program 1 times [2024-06-21 17:31:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:52,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867347851] [2024-06-21 17:31:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:52,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867347851] [2024-06-21 17:31:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867347851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:54,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:54,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:31:54,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608384947] [2024-06-21 17:31:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:54,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:31:54,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:31:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:31:54,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:31:54,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 798 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:54,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:54,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:31:54,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:55,278 INFO L124 PetriNetUnfolderBase]: 1241/1951 cut-off events. [2024-06-21 17:31:55,279 INFO L125 PetriNetUnfolderBase]: For 16336/16338 co-relation queries the response was YES. [2024-06-21 17:31:55,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 1951 events. 1241/1951 cut-off events. For 16336/16338 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9366 event pairs, 390 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8911. Up to 1825 conditions per place. [2024-06-21 17:31:55,290 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-21 17:31:55,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1132 flow [2024-06-21 17:31:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:31:55,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:31:55,292 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 798 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:31:55,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1132 flow [2024-06-21 17:31:55,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1087 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:55,307 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 802 flow [2024-06-21 17:31:55,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-06-21 17:31:55,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 17:31:55,307 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 802 flow [2024-06-21 17:31:55,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 17:31:55,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:55,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:55,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:31:55,308 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:55,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:55,309 INFO L85 PathProgramCache]: Analyzing trace with hash 227902427, now seen corresponding path program 1 times [2024-06-21 17:31:55,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:55,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378431004] [2024-06-21 17:31:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:55,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:58,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:58,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378431004] [2024-06-21 17:31:58,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378431004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:58,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:58,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:58,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477440714] [2024-06-21 17:31:58,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:58,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:58,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:58,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:31:58,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 802 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:58,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:58,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:31:58,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:59,004 INFO L124 PetriNetUnfolderBase]: 1254/1978 cut-off events. [2024-06-21 17:31:59,004 INFO L125 PetriNetUnfolderBase]: For 18230/18238 co-relation queries the response was YES. [2024-06-21 17:31:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9266 conditions, 1978 events. 1254/1978 cut-off events. For 18230/18238 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9515 event pairs, 374 based on Foata normal form. 10/1986 useless extension candidates. Maximal degree in co-relation 9225. Up to 1776 conditions per place. [2024-06-21 17:31:59,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 25 changer transitions 0/158 dead transitions. [2024-06-21 17:31:59,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1329 flow [2024-06-21 17:31:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:31:59,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:31:59,016 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 802 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:31:59,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1329 flow [2024-06-21 17:31:59,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1298 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:59,029 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 984 flow [2024-06-21 17:31:59,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=984, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-21 17:31:59,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 17:31:59,029 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 984 flow [2024-06-21 17:31:59,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:59,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:59,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:31:59,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:31:59,030 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:59,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:59,031 INFO L85 PathProgramCache]: Analyzing trace with hash 231627077, now seen corresponding path program 2 times [2024-06-21 17:31:59,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:59,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953907040] [2024-06-21 17:31:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:59,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:01,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:01,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953907040] [2024-06-21 17:32:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953907040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:01,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985612366] [2024-06-21 17:32:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:01,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:01,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 984 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:01,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:01,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:01,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:02,768 INFO L124 PetriNetUnfolderBase]: 1285/2032 cut-off events. [2024-06-21 17:32:02,769 INFO L125 PetriNetUnfolderBase]: For 21637/21639 co-relation queries the response was YES. [2024-06-21 17:32:02,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10059 conditions, 2032 events. 1285/2032 cut-off events. For 21637/21639 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9836 event pairs, 381 based on Foata normal form. 2/2031 useless extension candidates. Maximal degree in co-relation 10015. Up to 1667 conditions per place. [2024-06-21 17:32:02,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-21 17:32:02,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 1640 flow [2024-06-21 17:32:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:32:02,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:32:02,782 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 984 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:32:02,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 1640 flow [2024-06-21 17:32:02,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1588 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:02,803 INFO L231 Difference]: Finished difference. Result has 106 places, 134 transitions, 1190 flow [2024-06-21 17:32:02,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1190, PETRI_PLACES=106, PETRI_TRANSITIONS=134} [2024-06-21 17:32:02,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 17:32:02,804 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 134 transitions, 1190 flow [2024-06-21 17:32:02,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:02,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:02,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:02,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:32:02,805 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)] === [2024-06-21 17:32:02,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:02,806 INFO L85 PathProgramCache]: Analyzing trace with hash 231621497, now seen corresponding path program 3 times [2024-06-21 17:32:02,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:02,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826452970] [2024-06-21 17:32:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:02,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:05,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:05,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826452970] [2024-06-21 17:32:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826452970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:05,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:05,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710993774] [2024-06-21 17:32:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:05,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:05,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:05,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 134 transitions, 1190 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:05,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:05,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:05,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:07,107 INFO L124 PetriNetUnfolderBase]: 1280/2025 cut-off events. [2024-06-21 17:32:07,107 INFO L125 PetriNetUnfolderBase]: For 24861/24863 co-relation queries the response was YES. [2024-06-21 17:32:07,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10716 conditions, 2025 events. 1280/2025 cut-off events. For 24861/24863 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9769 event pairs, 381 based on Foata normal form. 2/2024 useless extension candidates. Maximal degree in co-relation 10669. Up to 1662 conditions per place. [2024-06-21 17:32:07,120 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 48 changer transitions 0/169 dead transitions. [2024-06-21 17:32:07,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1681 flow [2024-06-21 17:32:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 17:32:07,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 17:32:07,123 INFO L175 Difference]: Start difference. First operand has 106 places, 134 transitions, 1190 flow. Second operand 8 states and 151 transitions. [2024-06-21 17:32:07,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1681 flow [2024-06-21 17:32:07,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 169 transitions, 1637 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 17:32:07,148 INFO L231 Difference]: Finished difference. Result has 112 places, 134 transitions, 1250 flow [2024-06-21 17:32:07,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1250, PETRI_PLACES=112, PETRI_TRANSITIONS=134} [2024-06-21 17:32:07,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 17:32:07,149 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 134 transitions, 1250 flow [2024-06-21 17:32:07,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:07,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:07,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:32:07,149 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:07,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 522695881, now seen corresponding path program 4 times [2024-06-21 17:32:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:07,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024864570] [2024-06-21 17:32:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024864570] [2024-06-21 17:32:09,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024864570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:09,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:09,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884815272] [2024-06-21 17:32:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:09,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:09,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:09,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 134 transitions, 1250 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:09,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:09,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:09,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:11,046 INFO L124 PetriNetUnfolderBase]: 1293/2049 cut-off events. [2024-06-21 17:32:11,046 INFO L125 PetriNetUnfolderBase]: For 27894/27911 co-relation queries the response was YES. [2024-06-21 17:32:11,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11134 conditions, 2049 events. 1293/2049 cut-off events. For 27894/27911 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9935 event pairs, 385 based on Foata normal form. 6/2048 useless extension candidates. Maximal degree in co-relation 11085. Up to 1676 conditions per place. [2024-06-21 17:32:11,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-06-21 17:32:11,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 170 transitions, 1793 flow [2024-06-21 17:32:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:32:11,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:32:11,062 INFO L175 Difference]: Start difference. First operand has 112 places, 134 transitions, 1250 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:32:11,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 170 transitions, 1793 flow [2024-06-21 17:32:11,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 1674 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:11,083 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1335 flow [2024-06-21 17:32:11,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1335, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-21 17:32:11,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 17:32:11,084 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1335 flow [2024-06-21 17:32:11,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:11,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:11,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:32:11,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:11,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1427731321, now seen corresponding path program 5 times [2024-06-21 17:32:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399292722] [2024-06-21 17:32:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:11,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:13,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:13,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399292722] [2024-06-21 17:32:13,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399292722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:13,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:13,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:13,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080122411] [2024-06-21 17:32:13,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:13,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:13,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1335 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:13,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:13,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:13,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:14,741 INFO L124 PetriNetUnfolderBase]: 1306/2074 cut-off events. [2024-06-21 17:32:14,742 INFO L125 PetriNetUnfolderBase]: For 30684/30701 co-relation queries the response was YES. [2024-06-21 17:32:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11500 conditions, 2074 events. 1306/2074 cut-off events. For 30684/30701 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10127 event pairs, 385 based on Foata normal form. 6/2073 useless extension candidates. Maximal degree in co-relation 11449. Up to 1690 conditions per place. [2024-06-21 17:32:14,754 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 56 changer transitions 0/173 dead transitions. [2024-06-21 17:32:14,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1870 flow [2024-06-21 17:32:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:32:14,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 17:32:14,757 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1335 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:32:14,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1870 flow [2024-06-21 17:32:14,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1782 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:14,783 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 1408 flow [2024-06-21 17:32:14,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1408, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2024-06-21 17:32:14,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 17:32:14,784 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 1408 flow [2024-06-21 17:32:14,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:14,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:14,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:14,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:32:14,784 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:14,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1427736901, now seen corresponding path program 6 times [2024-06-21 17:32:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:14,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130053521] [2024-06-21 17:32:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:14,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:17,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130053521] [2024-06-21 17:32:17,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130053521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:17,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:17,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124445638] [2024-06-21 17:32:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:17,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:17,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:17,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 1408 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:17,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:17,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:17,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:18,618 INFO L124 PetriNetUnfolderBase]: 1301/2067 cut-off events. [2024-06-21 17:32:18,619 INFO L125 PetriNetUnfolderBase]: For 33097/33114 co-relation queries the response was YES. [2024-06-21 17:32:18,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11578 conditions, 2067 events. 1301/2067 cut-off events. For 33097/33114 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10053 event pairs, 385 based on Foata normal form. 6/2066 useless extension candidates. Maximal degree in co-relation 11526. Up to 1685 conditions per place. [2024-06-21 17:32:18,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 55 changer transitions 0/171 dead transitions. [2024-06-21 17:32:18,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 171 transitions, 1822 flow [2024-06-21 17:32:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:32:18,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:32:18,635 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 1408 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:32:18,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 171 transitions, 1822 flow [2024-06-21 17:32:18,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 171 transitions, 1641 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:18,662 INFO L231 Difference]: Finished difference. Result has 120 places, 142 transitions, 1345 flow [2024-06-21 17:32:18,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=120, PETRI_TRANSITIONS=142} [2024-06-21 17:32:18,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 17:32:18,662 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 142 transitions, 1345 flow [2024-06-21 17:32:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:18,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:18,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:18,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:32:18,663 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:18,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash 738986115, now seen corresponding path program 1 times [2024-06-21 17:32:18,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:18,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584839935] [2024-06-21 17:32:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:18,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:21,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584839935] [2024-06-21 17:32:21,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584839935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:21,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:21,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:21,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118568159] [2024-06-21 17:32:21,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:21,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:21,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:21,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:21,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:21,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:32:21,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 142 transitions, 1345 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:21,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:21,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:32:21,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:22,927 INFO L124 PetriNetUnfolderBase]: 1307/2102 cut-off events. [2024-06-21 17:32:22,927 INFO L125 PetriNetUnfolderBase]: For 39650/39676 co-relation queries the response was YES. [2024-06-21 17:32:22,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12019 conditions, 2102 events. 1307/2102 cut-off events. For 39650/39676 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10585 event pairs, 212 based on Foata normal form. 20/2076 useless extension candidates. Maximal degree in co-relation 11967. Up to 1677 conditions per place. [2024-06-21 17:32:22,941 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 48 changer transitions 0/192 dead transitions. [2024-06-21 17:32:22,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 1941 flow [2024-06-21 17:32:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:32:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:32:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:32:22,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 17:32:22,943 INFO L175 Difference]: Start difference. First operand has 120 places, 142 transitions, 1345 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:32:22,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 1941 flow [2024-06-21 17:32:22,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 1818 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:22,970 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1381 flow [2024-06-21 17:32:22,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-21 17:32:22,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 17:32:22,971 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1381 flow [2024-06-21 17:32:22,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:22,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:22,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:32:22,972 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)] === [2024-06-21 17:32:22,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1258038173, now seen corresponding path program 2 times [2024-06-21 17:32:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:22,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600700732] [2024-06-21 17:32:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:22,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:25,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600700732] [2024-06-21 17:32:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600700732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:25,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:25,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893510201] [2024-06-21 17:32:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:25,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:32:25,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:25,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:25,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:32:25,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:26,823 INFO L124 PetriNetUnfolderBase]: 1295/2084 cut-off events. [2024-06-21 17:32:26,823 INFO L125 PetriNetUnfolderBase]: For 42273/42306 co-relation queries the response was YES. [2024-06-21 17:32:26,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12059 conditions, 2084 events. 1295/2084 cut-off events. For 42273/42306 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10500 event pairs, 297 based on Foata normal form. 18/2057 useless extension candidates. Maximal degree in co-relation 12006. Up to 1758 conditions per place. [2024-06-21 17:32:26,837 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 44 changer transitions 0/184 dead transitions. [2024-06-21 17:32:26,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 1809 flow [2024-06-21 17:32:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:32:26,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:32:26,839 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1381 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:32:26,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 1809 flow [2024-06-21 17:32:26,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1712 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:32:26,868 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1382 flow [2024-06-21 17:32:26,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-21 17:32:26,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 17:32:26,869 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1382 flow [2024-06-21 17:32:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:26,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:26,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:26,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:32:26,870 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)] === [2024-06-21 17:32:26,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1263389615, now seen corresponding path program 3 times [2024-06-21 17:32:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:26,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389363182] [2024-06-21 17:32:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:30,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:30,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389363182] [2024-06-21 17:32:30,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389363182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:30,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:30,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:30,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956089690] [2024-06-21 17:32:30,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:30,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:30,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:32:30,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1382 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:30,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:30,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:32:30,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:31,340 INFO L124 PetriNetUnfolderBase]: 1319/2121 cut-off events. [2024-06-21 17:32:31,340 INFO L125 PetriNetUnfolderBase]: For 46246/46265 co-relation queries the response was YES. [2024-06-21 17:32:31,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12393 conditions, 2121 events. 1319/2121 cut-off events. For 46246/46265 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10748 event pairs, 308 based on Foata normal form. 6/2074 useless extension candidates. Maximal degree in co-relation 12338. Up to 1729 conditions per place. [2024-06-21 17:32:31,353 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/181 dead transitions. [2024-06-21 17:32:31,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 181 transitions, 1814 flow [2024-06-21 17:32:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:32:31,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:32:31,354 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1382 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:32:31,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 181 transitions, 1814 flow [2024-06-21 17:32:31,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 1716 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:32:31,388 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1448 flow [2024-06-21 17:32:31,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1448, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-21 17:32:31,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-21 17:32:31,389 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1448 flow [2024-06-21 17:32:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:31,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:31,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:32:31,390 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)] === [2024-06-21 17:32:31,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:31,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1263204917, now seen corresponding path program 1 times [2024-06-21 17:32:31,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:31,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796764516] [2024-06-21 17:32:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:31,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:34,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796764516] [2024-06-21 17:32:34,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796764516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:34,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:34,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:34,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588850315] [2024-06-21 17:32:34,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:34,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:34,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:34,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:34,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1448 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:34,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:34,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:34,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:35,299 INFO L124 PetriNetUnfolderBase]: 1405/2235 cut-off events. [2024-06-21 17:32:35,299 INFO L125 PetriNetUnfolderBase]: For 46487/46499 co-relation queries the response was YES. [2024-06-21 17:32:35,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12932 conditions, 2235 events. 1405/2235 cut-off events. For 46487/46499 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11117 event pairs, 346 based on Foata normal form. 16/2248 useless extension candidates. Maximal degree in co-relation 12876. Up to 1990 conditions per place. [2024-06-21 17:32:35,311 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 30 changer transitions 0/185 dead transitions. [2024-06-21 17:32:35,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1926 flow [2024-06-21 17:32:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:32:35,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:32:35,313 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1448 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:32:35,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1926 flow [2024-06-21 17:32:35,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1782 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:35,350 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1389 flow [2024-06-21 17:32:35,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-21 17:32:35,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 17:32:35,351 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1389 flow [2024-06-21 17:32:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:35,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:35,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:35,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:32:35,351 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)] === [2024-06-21 17:32:35,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1204374357, now seen corresponding path program 4 times [2024-06-21 17:32:35,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:35,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688026006] [2024-06-21 17:32:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:38,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:38,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688026006] [2024-06-21 17:32:38,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688026006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:38,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:38,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599210930] [2024-06-21 17:32:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:38,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:38,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:38,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:32:38,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1389 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:32:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:39,442 INFO L124 PetriNetUnfolderBase]: 1330/2137 cut-off events. [2024-06-21 17:32:39,442 INFO L125 PetriNetUnfolderBase]: For 51774/51812 co-relation queries the response was YES. [2024-06-21 17:32:39,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 2137 events. 1330/2137 cut-off events. For 51774/51812 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10764 event pairs, 312 based on Foata normal form. 10/2087 useless extension candidates. Maximal degree in co-relation 12647. Up to 1745 conditions per place. [2024-06-21 17:32:39,455 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-21 17:32:39,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 1817 flow [2024-06-21 17:32:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:32:39,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:32:39,457 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1389 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:32:39,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 1817 flow [2024-06-21 17:32:39,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 1750 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:39,495 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1490 flow [2024-06-21 17:32:39,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1490, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-21 17:32:39,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 17:32:39,495 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1490 flow [2024-06-21 17:32:39,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:39,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:39,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:39,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:32:39,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:39,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1538080485, now seen corresponding path program 2 times [2024-06-21 17:32:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078401939] [2024-06-21 17:32:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:39,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:41,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:41,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078401939] [2024-06-21 17:32:41,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078401939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926222303] [2024-06-21 17:32:41,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:41,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:41,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:41,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:41,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1490 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:41,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:41,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:41,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:43,081 INFO L124 PetriNetUnfolderBase]: 1412/2250 cut-off events. [2024-06-21 17:32:43,081 INFO L125 PetriNetUnfolderBase]: For 51605/51633 co-relation queries the response was YES. [2024-06-21 17:32:43,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13230 conditions, 2250 events. 1412/2250 cut-off events. For 51605/51633 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11301 event pairs, 340 based on Foata normal form. 24/2270 useless extension candidates. Maximal degree in co-relation 13172. Up to 2003 conditions per place. [2024-06-21 17:32:43,097 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-21 17:32:43,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1966 flow [2024-06-21 17:32:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:32:43,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:32:43,099 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1490 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:32:43,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1966 flow [2024-06-21 17:32:43,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 186 transitions, 1818 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:43,129 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1433 flow [2024-06-21 17:32:43,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-21 17:32:43,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 17:32:43,130 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1433 flow [2024-06-21 17:32:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:43,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:43,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:43,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:32:43,131 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)] === [2024-06-21 17:32:43,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1310179335, now seen corresponding path program 3 times [2024-06-21 17:32:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206086542] [2024-06-21 17:32:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:43,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:45,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:45,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206086542] [2024-06-21 17:32:45,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206086542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:45,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:45,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939254217] [2024-06-21 17:32:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:45,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:45,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:45,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1433 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:45,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:45,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:45,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:47,071 INFO L124 PetriNetUnfolderBase]: 1432/2282 cut-off events. [2024-06-21 17:32:47,071 INFO L125 PetriNetUnfolderBase]: For 54602/54630 co-relation queries the response was YES. [2024-06-21 17:32:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13451 conditions, 2282 events. 1432/2282 cut-off events. For 54602/54630 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11412 event pairs, 346 based on Foata normal form. 24/2302 useless extension candidates. Maximal degree in co-relation 13392. Up to 2035 conditions per place. [2024-06-21 17:32:47,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-06-21 17:32:47,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 1917 flow [2024-06-21 17:32:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:32:47,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:32:47,089 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1433 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:32:47,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 1917 flow [2024-06-21 17:32:47,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1844 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:47,126 INFO L231 Difference]: Finished difference. Result has 135 places, 156 transitions, 1453 flow [2024-06-21 17:32:47,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=135, PETRI_TRANSITIONS=156} [2024-06-21 17:32:47,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 17:32:47,130 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 156 transitions, 1453 flow [2024-06-21 17:32:47,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:47,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:47,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:47,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:32:47,131 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:47,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash -912415551, now seen corresponding path program 4 times [2024-06-21 17:32:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369031397] [2024-06-21 17:32:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:49,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:49,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369031397] [2024-06-21 17:32:49,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369031397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:49,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:49,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:32:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650490856] [2024-06-21 17:32:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:32:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:32:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:32:49,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:49,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 156 transitions, 1453 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:49,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:49,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:49,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:50,440 INFO L124 PetriNetUnfolderBase]: 1424/2270 cut-off events. [2024-06-21 17:32:50,440 INFO L125 PetriNetUnfolderBase]: For 56950/56978 co-relation queries the response was YES. [2024-06-21 17:32:50,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13522 conditions, 2270 events. 1424/2270 cut-off events. For 56950/56978 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11358 event pairs, 308 based on Foata normal form. 24/2290 useless extension candidates. Maximal degree in co-relation 13462. Up to 1929 conditions per place. [2024-06-21 17:32:50,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 148 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-21 17:32:50,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 1949 flow [2024-06-21 17:32:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:32:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:32:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:32:50,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:32:50,459 INFO L175 Difference]: Start difference. First operand has 135 places, 156 transitions, 1453 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:32:50,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 1949 flow [2024-06-21 17:32:50,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 1874 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:50,502 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1491 flow [2024-06-21 17:32:50,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-21 17:32:50,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 17:32:50,505 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1491 flow [2024-06-21 17:32:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:32:50,505 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:50,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1995386856, now seen corresponding path program 1 times [2024-06-21 17:32:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61410009] [2024-06-21 17:32:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:51,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:51,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61410009] [2024-06-21 17:32:51,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61410009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:51,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:32:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278023542] [2024-06-21 17:32:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:51,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:32:51,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:32:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:32:51,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:32:51,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-21 17:32:51,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:51,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:32:51,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:52,756 INFO L124 PetriNetUnfolderBase]: 1314/2145 cut-off events. [2024-06-21 17:32:52,757 INFO L125 PetriNetUnfolderBase]: For 57997/58031 co-relation queries the response was YES. [2024-06-21 17:32:52,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12975 conditions, 2145 events. 1314/2145 cut-off events. For 57997/58031 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11133 event pairs, 343 based on Foata normal form. 34/2175 useless extension candidates. Maximal degree in co-relation 12914. Up to 1925 conditions per place. [2024-06-21 17:32:52,772 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 141 selfloop transitions, 10 changer transitions 0/172 dead transitions. [2024-06-21 17:32:52,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1843 flow [2024-06-21 17:32:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:32:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:32:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:32:52,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:32:52,774 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1491 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:32:52,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1843 flow [2024-06-21 17:32:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 172 transitions, 1748 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:32:52,813 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1448 flow [2024-06-21 17:32:52,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1448, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-21 17:32:52,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 17:32:52,813 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1448 flow [2024-06-21 17:32:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-21 17:32:52,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:52,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:52,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:32:52,814 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:52,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -117767908, now seen corresponding path program 1 times [2024-06-21 17:32:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192316740] [2024-06-21 17:32:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:56,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192316740] [2024-06-21 17:32:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192316740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:56,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:56,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979914963] [2024-06-21 17:32:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:56,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:32:56,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1448 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:56,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:56,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:32:56,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:57,600 INFO L124 PetriNetUnfolderBase]: 1562/2516 cut-off events. [2024-06-21 17:32:57,600 INFO L125 PetriNetUnfolderBase]: For 73029/73041 co-relation queries the response was YES. [2024-06-21 17:32:57,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15212 conditions, 2516 events. 1562/2516 cut-off events. For 73029/73041 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13208 event pairs, 255 based on Foata normal form. 24/2538 useless extension candidates. Maximal degree in co-relation 15150. Up to 1924 conditions per place. [2024-06-21 17:32:57,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-21 17:32:57,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 224 transitions, 2248 flow [2024-06-21 17:32:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:32:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:32:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:32:57,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:32:57,621 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1448 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:32:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 224 transitions, 2248 flow [2024-06-21 17:32:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2218 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:32:57,671 INFO L231 Difference]: Finished difference. Result has 145 places, 166 transitions, 1557 flow [2024-06-21 17:32:57,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1557, PETRI_PLACES=145, PETRI_TRANSITIONS=166} [2024-06-21 17:32:57,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 17:32:57,672 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 166 transitions, 1557 flow [2024-06-21 17:32:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:57,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:32:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:32:57,672 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)] === [2024-06-21 17:32:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 123878390, now seen corresponding path program 2 times [2024-06-21 17:32:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174254626] [2024-06-21 17:32:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:00,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174254626] [2024-06-21 17:33:00,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174254626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:00,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:00,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592567853] [2024-06-21 17:33:00,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:00,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:00,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:00,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:00,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:00,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 166 transitions, 1557 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:00,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:00,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:00,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:02,181 INFO L124 PetriNetUnfolderBase]: 1610/2600 cut-off events. [2024-06-21 17:33:02,181 INFO L125 PetriNetUnfolderBase]: For 78234/78246 co-relation queries the response was YES. [2024-06-21 17:33:02,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15960 conditions, 2600 events. 1610/2600 cut-off events. For 78234/78246 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13740 event pairs, 354 based on Foata normal form. 24/2622 useless extension candidates. Maximal degree in co-relation 15895. Up to 2102 conditions per place. [2024-06-21 17:33:02,197 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 26 changer transitions 0/220 dead transitions. [2024-06-21 17:33:02,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 220 transitions, 2316 flow [2024-06-21 17:33:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:33:02,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:33:02,200 INFO L175 Difference]: Start difference. First operand has 145 places, 166 transitions, 1557 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:33:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 220 transitions, 2316 flow [2024-06-21 17:33:02,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 220 transitions, 2262 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:02,263 INFO L231 Difference]: Finished difference. Result has 150 places, 169 transitions, 1614 flow [2024-06-21 17:33:02,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1614, PETRI_PLACES=150, PETRI_TRANSITIONS=169} [2024-06-21 17:33:02,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 17:33:02,265 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 169 transitions, 1614 flow [2024-06-21 17:33:02,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:02,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:02,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:33:02,265 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)] === [2024-06-21 17:33:02,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 210718070, now seen corresponding path program 3 times [2024-06-21 17:33:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:02,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693982277] [2024-06-21 17:33:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:05,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693982277] [2024-06-21 17:33:05,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693982277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:05,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:05,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:05,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601905122] [2024-06-21 17:33:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:05,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:05,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:05,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:05,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:05,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:05,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 169 transitions, 1614 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:05,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:05,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:05,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:07,071 INFO L124 PetriNetUnfolderBase]: 1582/2556 cut-off events. [2024-06-21 17:33:07,072 INFO L125 PetriNetUnfolderBase]: For 78122/78134 co-relation queries the response was YES. [2024-06-21 17:33:07,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15518 conditions, 2556 events. 1582/2556 cut-off events. For 78122/78134 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13505 event pairs, 358 based on Foata normal form. 28/2582 useless extension candidates. Maximal degree in co-relation 15450. Up to 2206 conditions per place. [2024-06-21 17:33:07,092 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 26 changer transitions 0/216 dead transitions. [2024-06-21 17:33:07,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 216 transitions, 2208 flow [2024-06-21 17:33:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:33:07,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:33:07,094 INFO L175 Difference]: Start difference. First operand has 150 places, 169 transitions, 1614 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:33:07,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 216 transitions, 2208 flow [2024-06-21 17:33:07,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 216 transitions, 2138 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:07,156 INFO L231 Difference]: Finished difference. Result has 154 places, 170 transitions, 1627 flow [2024-06-21 17:33:07,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1627, PETRI_PLACES=154, PETRI_TRANSITIONS=170} [2024-06-21 17:33:07,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 17:33:07,157 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 170 transitions, 1627 flow [2024-06-21 17:33:07,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:07,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:07,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:07,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:33:07,158 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)] === [2024-06-21 17:33:07,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash -504860576, now seen corresponding path program 4 times [2024-06-21 17:33:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:07,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508360191] [2024-06-21 17:33:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508360191] [2024-06-21 17:33:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508360191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:10,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:10,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:10,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818122843] [2024-06-21 17:33:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:10,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:10,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:10,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:10,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 170 transitions, 1627 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:10,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:10,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:10,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:12,129 INFO L124 PetriNetUnfolderBase]: 1650/2681 cut-off events. [2024-06-21 17:33:12,129 INFO L125 PetriNetUnfolderBase]: For 82538/82540 co-relation queries the response was YES. [2024-06-21 17:33:12,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16104 conditions, 2681 events. 1650/2681 cut-off events. For 82538/82540 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14489 event pairs, 394 based on Foata normal form. 16/2694 useless extension candidates. Maximal degree in co-relation 16034. Up to 2162 conditions per place. [2024-06-21 17:33:12,148 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 58 changer transitions 0/212 dead transitions. [2024-06-21 17:33:12,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 212 transitions, 2189 flow [2024-06-21 17:33:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:33:12,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 17:33:12,150 INFO L175 Difference]: Start difference. First operand has 154 places, 170 transitions, 1627 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:33:12,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 212 transitions, 2189 flow [2024-06-21 17:33:12,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 212 transitions, 2140 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:12,215 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1721 flow [2024-06-21 17:33:12,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1721, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2024-06-21 17:33:12,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 17:33:12,216 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1721 flow [2024-06-21 17:33:12,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:12,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:12,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:12,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:33:12,216 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)] === [2024-06-21 17:33:12,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash -510222956, now seen corresponding path program 5 times [2024-06-21 17:33:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482882395] [2024-06-21 17:33:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:15,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482882395] [2024-06-21 17:33:15,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482882395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:15,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:15,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:15,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847379792] [2024-06-21 17:33:15,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:15,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:15,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:15,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:15,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1721 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:17,153 INFO L124 PetriNetUnfolderBase]: 1718/2809 cut-off events. [2024-06-21 17:33:17,154 INFO L125 PetriNetUnfolderBase]: For 88758/88760 co-relation queries the response was YES. [2024-06-21 17:33:17,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16944 conditions, 2809 events. 1718/2809 cut-off events. For 88758/88760 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15509 event pairs, 412 based on Foata normal form. 16/2822 useless extension candidates. Maximal degree in co-relation 16873. Up to 2278 conditions per place. [2024-06-21 17:33:17,176 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 56 changer transitions 0/213 dead transitions. [2024-06-21 17:33:17,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 213 transitions, 2287 flow [2024-06-21 17:33:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:33:17,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 17:33:17,179 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1721 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:33:17,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 213 transitions, 2287 flow [2024-06-21 17:33:17,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2162 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:17,276 INFO L231 Difference]: Finished difference. Result has 158 places, 172 transitions, 1737 flow [2024-06-21 17:33:17,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=158, PETRI_TRANSITIONS=172} [2024-06-21 17:33:17,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 17:33:17,277 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 172 transitions, 1737 flow [2024-06-21 17:33:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:17,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:33:17,277 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)] === [2024-06-21 17:33:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash -750143174, now seen corresponding path program 6 times [2024-06-21 17:33:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477223103] [2024-06-21 17:33:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:17,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477223103] [2024-06-21 17:33:20,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477223103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346586633] [2024-06-21 17:33:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:20,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:20,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 1737 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:20,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:20,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:20,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:21,806 INFO L124 PetriNetUnfolderBase]: 1766/2893 cut-off events. [2024-06-21 17:33:21,806 INFO L125 PetriNetUnfolderBase]: For 91731/91733 co-relation queries the response was YES. [2024-06-21 17:33:21,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17380 conditions, 2893 events. 1766/2893 cut-off events. For 91731/91733 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16091 event pairs, 404 based on Foata normal form. 12/2902 useless extension candidates. Maximal degree in co-relation 17308. Up to 2144 conditions per place. [2024-06-21 17:33:21,825 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 59 changer transitions 0/219 dead transitions. [2024-06-21 17:33:21,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 219 transitions, 2357 flow [2024-06-21 17:33:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:33:21,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 17:33:21,827 INFO L175 Difference]: Start difference. First operand has 158 places, 172 transitions, 1737 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:33:21,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 219 transitions, 2357 flow [2024-06-21 17:33:21,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 219 transitions, 2234 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:21,901 INFO L231 Difference]: Finished difference. Result has 161 places, 175 transitions, 1799 flow [2024-06-21 17:33:21,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1799, PETRI_PLACES=161, PETRI_TRANSITIONS=175} [2024-06-21 17:33:21,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 17:33:21,902 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 175 transitions, 1799 flow [2024-06-21 17:33:21,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:21,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:21,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:21,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:33:21,903 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)] === [2024-06-21 17:33:21,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash 488732876, now seen corresponding path program 1 times [2024-06-21 17:33:21,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:21,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344312744] [2024-06-21 17:33:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:21,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:25,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344312744] [2024-06-21 17:33:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344312744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:25,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:25,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:25,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263777813] [2024-06-21 17:33:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:25,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:25,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 175 transitions, 1799 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:25,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:25,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:25,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:26,857 INFO L124 PetriNetUnfolderBase]: 1814/2977 cut-off events. [2024-06-21 17:33:26,858 INFO L125 PetriNetUnfolderBase]: For 97289/97291 co-relation queries the response was YES. [2024-06-21 17:33:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17919 conditions, 2977 events. 1814/2977 cut-off events. For 97289/97291 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16708 event pairs, 414 based on Foata normal form. 12/2986 useless extension candidates. Maximal degree in co-relation 17845. Up to 2116 conditions per place. [2024-06-21 17:33:26,878 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 62 changer transitions 0/220 dead transitions. [2024-06-21 17:33:26,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2399 flow [2024-06-21 17:33:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:33:26,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:33:26,887 INFO L175 Difference]: Start difference. First operand has 161 places, 175 transitions, 1799 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:33:26,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2399 flow [2024-06-21 17:33:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 220 transitions, 2306 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:26,996 INFO L231 Difference]: Finished difference. Result has 165 places, 176 transitions, 1862 flow [2024-06-21 17:33:26,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1862, PETRI_PLACES=165, PETRI_TRANSITIONS=176} [2024-06-21 17:33:26,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 17:33:26,997 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 176 transitions, 1862 flow [2024-06-21 17:33:26,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:26,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:26,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:33:26,998 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)] === [2024-06-21 17:33:26,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash -200386520, now seen corresponding path program 7 times [2024-06-21 17:33:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:26,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009209211] [2024-06-21 17:33:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:26,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:29,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:29,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009209211] [2024-06-21 17:33:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009209211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:29,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:29,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12077089] [2024-06-21 17:33:29,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:29,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 176 transitions, 1862 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:29,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:29,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:31,321 INFO L124 PetriNetUnfolderBase]: 1882/3104 cut-off events. [2024-06-21 17:33:31,322 INFO L125 PetriNetUnfolderBase]: For 105772/105789 co-relation queries the response was YES. [2024-06-21 17:33:31,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18817 conditions, 3104 events. 1882/3104 cut-off events. For 105772/105789 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17744 event pairs, 458 based on Foata normal form. 20/3117 useless extension candidates. Maximal degree in co-relation 18741. Up to 2562 conditions per place. [2024-06-21 17:33:31,344 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 60 changer transitions 0/215 dead transitions. [2024-06-21 17:33:31,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 215 transitions, 2430 flow [2024-06-21 17:33:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:33:31,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 17:33:31,346 INFO L175 Difference]: Start difference. First operand has 165 places, 176 transitions, 1862 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:33:31,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 215 transitions, 2430 flow [2024-06-21 17:33:31,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 215 transitions, 2288 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:31,437 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 1875 flow [2024-06-21 17:33:31,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1875, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-06-21 17:33:31,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 17:33:31,437 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 1875 flow [2024-06-21 17:33:31,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:31,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:31,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:31,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:33:31,438 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)] === [2024-06-21 17:33:31,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:31,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1255990456, now seen corresponding path program 8 times [2024-06-21 17:33:31,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:31,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82342249] [2024-06-21 17:33:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:31,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:34,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82342249] [2024-06-21 17:33:34,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82342249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:34,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:34,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:34,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635333344] [2024-06-21 17:33:34,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:34,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:34,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:34,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:34,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 1875 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:34,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:34,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:34,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:36,272 INFO L124 PetriNetUnfolderBase]: 1950/3220 cut-off events. [2024-06-21 17:33:36,273 INFO L125 PetriNetUnfolderBase]: For 111896/111913 co-relation queries the response was YES. [2024-06-21 17:33:36,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 3220 events. 1950/3220 cut-off events. For 111896/111913 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18665 event pairs, 470 based on Foata normal form. 20/3233 useless extension candidates. Maximal degree in co-relation 19332. Up to 2678 conditions per place. [2024-06-21 17:33:36,295 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-21 17:33:36,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 216 transitions, 2447 flow [2024-06-21 17:33:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:33:36,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:33:36,297 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 1875 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:33:36,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 216 transitions, 2447 flow [2024-06-21 17:33:36,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 216 transitions, 2310 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:36,386 INFO L231 Difference]: Finished difference. Result has 169 places, 178 transitions, 1887 flow [2024-06-21 17:33:36,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1887, PETRI_PLACES=169, PETRI_TRANSITIONS=178} [2024-06-21 17:33:36,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 17:33:36,387 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 178 transitions, 1887 flow [2024-06-21 17:33:36,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:36,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:36,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:36,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:33:36,388 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)] === [2024-06-21 17:33:36,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1955277528, now seen corresponding path program 9 times [2024-06-21 17:33:36,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:36,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860601392] [2024-06-21 17:33:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:36,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860601392] [2024-06-21 17:33:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860601392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576028828] [2024-06-21 17:33:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:39,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:39,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:39,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 178 transitions, 1887 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:39,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:39,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:39,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:41,371 INFO L124 PetriNetUnfolderBase]: 2018/3348 cut-off events. [2024-06-21 17:33:41,371 INFO L125 PetriNetUnfolderBase]: For 118367/118384 co-relation queries the response was YES. [2024-06-21 17:33:41,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20011 conditions, 3348 events. 2018/3348 cut-off events. For 118367/118384 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19672 event pairs, 488 based on Foata normal form. 20/3361 useless extension candidates. Maximal degree in co-relation 19933. Up to 2794 conditions per place. [2024-06-21 17:33:41,402 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 57 changer transitions 0/217 dead transitions. [2024-06-21 17:33:41,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 217 transitions, 2463 flow [2024-06-21 17:33:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:33:41,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:33:41,404 INFO L175 Difference]: Start difference. First operand has 169 places, 178 transitions, 1887 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:33:41,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 217 transitions, 2463 flow [2024-06-21 17:33:41,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 217 transitions, 2332 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:41,524 INFO L231 Difference]: Finished difference. Result has 171 places, 179 transitions, 1909 flow [2024-06-21 17:33:41,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1909, PETRI_PLACES=171, PETRI_TRANSITIONS=179} [2024-06-21 17:33:41,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 17:33:41,525 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 179 transitions, 1909 flow [2024-06-21 17:33:41,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:41,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:41,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:41,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:33:41,526 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)] === [2024-06-21 17:33:41,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1955129658, now seen corresponding path program 10 times [2024-06-21 17:33:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:41,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011054646] [2024-06-21 17:33:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:41,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011054646] [2024-06-21 17:33:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011054646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077140496] [2024-06-21 17:33:44,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:44,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:44,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:45,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:45,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 1909 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:45,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:45,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:45,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:46,443 INFO L124 PetriNetUnfolderBase]: 2038/3388 cut-off events. [2024-06-21 17:33:46,444 INFO L125 PetriNetUnfolderBase]: For 117750/117767 co-relation queries the response was YES. [2024-06-21 17:33:46,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20039 conditions, 3388 events. 2038/3388 cut-off events. For 117750/117767 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19972 event pairs, 478 based on Foata normal form. 16/3397 useless extension candidates. Maximal degree in co-relation 19960. Up to 2504 conditions per place. [2024-06-21 17:33:46,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 61 changer transitions 0/223 dead transitions. [2024-06-21 17:33:46,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 223 transitions, 2549 flow [2024-06-21 17:33:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:33:46,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:33:46,483 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 1909 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:33:46,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 223 transitions, 2549 flow [2024-06-21 17:33:46,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 223 transitions, 2414 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:46,616 INFO L231 Difference]: Finished difference. Result has 174 places, 182 transitions, 1986 flow [2024-06-21 17:33:46,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=174, PETRI_TRANSITIONS=182} [2024-06-21 17:33:46,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 17:33:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 182 transitions, 1986 flow [2024-06-21 17:33:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:46,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:46,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:46,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:33:46,618 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)] === [2024-06-21 17:33:46,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1960855110, now seen corresponding path program 2 times [2024-06-21 17:33:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908010390] [2024-06-21 17:33:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:49,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:49,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908010390] [2024-06-21 17:33:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908010390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:49,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:49,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947991751] [2024-06-21 17:33:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:49,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:49,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 182 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:49,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:49,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:49,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:50,765 INFO L124 PetriNetUnfolderBase]: 2086/3484 cut-off events. [2024-06-21 17:33:50,766 INFO L125 PetriNetUnfolderBase]: For 123718/123735 co-relation queries the response was YES. [2024-06-21 17:33:50,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20588 conditions, 3484 events. 2086/3484 cut-off events. For 123718/123735 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20793 event pairs, 498 based on Foata normal form. 16/3493 useless extension candidates. Maximal degree in co-relation 20507. Up to 2700 conditions per place. [2024-06-21 17:33:50,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 59 changer transitions 0/224 dead transitions. [2024-06-21 17:33:50,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 224 transitions, 2596 flow [2024-06-21 17:33:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:33:50,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 17:33:50,798 INFO L175 Difference]: Start difference. First operand has 174 places, 182 transitions, 1986 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:33:50,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 224 transitions, 2596 flow [2024-06-21 17:33:50,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 2483 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:33:50,928 INFO L231 Difference]: Finished difference. Result has 178 places, 183 transitions, 2033 flow [2024-06-21 17:33:50,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2033, PETRI_PLACES=178, PETRI_TRANSITIONS=183} [2024-06-21 17:33:50,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 17:33:50,929 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 183 transitions, 2033 flow [2024-06-21 17:33:50,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:50,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:50,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:50,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:33:50,930 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)] === [2024-06-21 17:33:50,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 435856168, now seen corresponding path program 3 times [2024-06-21 17:33:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:50,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294022241] [2024-06-21 17:33:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:53,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294022241] [2024-06-21 17:33:53,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294022241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:53,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:53,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:53,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404898378] [2024-06-21 17:33:53,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:53,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:53,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:53,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 183 transitions, 2033 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:53,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:53,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:53,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:54,976 INFO L124 PetriNetUnfolderBase]: 2134/3580 cut-off events. [2024-06-21 17:33:54,976 INFO L125 PetriNetUnfolderBase]: For 129747/129764 co-relation queries the response was YES. [2024-06-21 17:33:54,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21257 conditions, 3580 events. 2134/3580 cut-off events. For 129747/129764 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21622 event pairs, 516 based on Foata normal form. 16/3589 useless extension candidates. Maximal degree in co-relation 21174. Up to 2896 conditions per place. [2024-06-21 17:33:55,007 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 62 changer transitions 0/225 dead transitions. [2024-06-21 17:33:55,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 225 transitions, 2647 flow [2024-06-21 17:33:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:33:55,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:33:55,009 INFO L175 Difference]: Start difference. First operand has 178 places, 183 transitions, 2033 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:33:55,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 225 transitions, 2647 flow [2024-06-21 17:33:55,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 225 transitions, 2501 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:55,157 INFO L231 Difference]: Finished difference. Result has 180 places, 184 transitions, 2055 flow [2024-06-21 17:33:55,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2055, PETRI_PLACES=180, PETRI_TRANSITIONS=184} [2024-06-21 17:33:55,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 17:33:55,158 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 184 transitions, 2055 flow [2024-06-21 17:33:55,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:55,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:55,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:55,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:33:55,159 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)] === [2024-06-21 17:33:55,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 701553448, now seen corresponding path program 4 times [2024-06-21 17:33:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:55,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960660714] [2024-06-21 17:33:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:57,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960660714] [2024-06-21 17:33:57,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960660714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:57,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:57,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:57,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843009208] [2024-06-21 17:33:57,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:57,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:57,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:57,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:58,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:33:58,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 184 transitions, 2055 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:58,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:58,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:33:58,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:59,554 INFO L124 PetriNetUnfolderBase]: 2114/3548 cut-off events. [2024-06-21 17:33:59,555 INFO L125 PetriNetUnfolderBase]: For 123933/123950 co-relation queries the response was YES. [2024-06-21 17:33:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20563 conditions, 3548 events. 2114/3548 cut-off events. For 123933/123950 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21341 event pairs, 451 based on Foata normal form. 16/3557 useless extension candidates. Maximal degree in co-relation 20479. Up to 1958 conditions per place. [2024-06-21 17:33:59,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 74 changer transitions 0/225 dead transitions. [2024-06-21 17:33:59,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 225 transitions, 2551 flow [2024-06-21 17:33:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:33:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:33:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:33:59,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:33:59,592 INFO L175 Difference]: Start difference. First operand has 180 places, 184 transitions, 2055 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:33:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 225 transitions, 2551 flow [2024-06-21 17:33:59,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 225 transitions, 2397 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:33:59,726 INFO L231 Difference]: Finished difference. Result has 181 places, 183 transitions, 1969 flow [2024-06-21 17:33:59,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=181, PETRI_TRANSITIONS=183} [2024-06-21 17:33:59,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 17:33:59,727 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 183 transitions, 1969 flow [2024-06-21 17:33:59,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:33:59,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:59,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:59,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:33:59,727 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:59,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 851097835, now seen corresponding path program 1 times [2024-06-21 17:33:59,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267484646] [2024-06-21 17:33:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:59,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:02,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:02,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267484646] [2024-06-21 17:34:02,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267484646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:02,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:02,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165786342] [2024-06-21 17:34:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:02,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:02,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:34:02,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 183 transitions, 1969 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:02,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:02,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:34:02,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:03,481 INFO L124 PetriNetUnfolderBase]: 2020/3425 cut-off events. [2024-06-21 17:34:03,481 INFO L125 PetriNetUnfolderBase]: For 124108/124142 co-relation queries the response was YES. [2024-06-21 17:34:03,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20322 conditions, 3425 events. 2020/3425 cut-off events. For 124108/124142 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20985 event pairs, 481 based on Foata normal form. 36/3422 useless extension candidates. Maximal degree in co-relation 20237. Up to 3047 conditions per place. [2024-06-21 17:34:03,516 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 155 selfloop transitions, 41 changer transitions 0/217 dead transitions. [2024-06-21 17:34:03,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 217 transitions, 2608 flow [2024-06-21 17:34:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:34:03,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:34:03,518 INFO L175 Difference]: Start difference. First operand has 181 places, 183 transitions, 1969 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:34:03,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 217 transitions, 2608 flow [2024-06-21 17:34:03,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 217 transitions, 2330 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 17:34:03,662 INFO L231 Difference]: Finished difference. Result has 179 places, 194 transitions, 1890 flow [2024-06-21 17:34:03,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1890, PETRI_PLACES=179, PETRI_TRANSITIONS=194} [2024-06-21 17:34:03,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 17:34:03,663 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 194 transitions, 1890 flow [2024-06-21 17:34:03,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:03,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:03,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:34:03,664 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:03,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 478794135, now seen corresponding path program 2 times [2024-06-21 17:34:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727867650] [2024-06-21 17:34:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:05,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:05,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727867650] [2024-06-21 17:34:05,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727867650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:05,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:05,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:05,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672074040] [2024-06-21 17:34:05,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:05,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:05,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:05,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:05,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:05,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:34:05,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 194 transitions, 1890 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:05,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:05,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:34:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:06,930 INFO L124 PetriNetUnfolderBase]: 2007/3408 cut-off events. [2024-06-21 17:34:06,930 INFO L125 PetriNetUnfolderBase]: For 123513/123524 co-relation queries the response was YES. [2024-06-21 17:34:06,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19502 conditions, 3408 events. 2007/3408 cut-off events. For 123513/123524 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20983 event pairs, 482 based on Foata normal form. 13/3382 useless extension candidates. Maximal degree in co-relation 19419. Up to 3039 conditions per place. [2024-06-21 17:34:06,957 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 153 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2024-06-21 17:34:06,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 213 transitions, 2326 flow [2024-06-21 17:34:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 17:34:06,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:34:06,959 INFO L175 Difference]: Start difference. First operand has 179 places, 194 transitions, 1890 flow. Second operand 6 states and 111 transitions. [2024-06-21 17:34:06,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 213 transitions, 2326 flow [2024-06-21 17:34:07,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 213 transitions, 2266 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 17:34:07,111 INFO L231 Difference]: Finished difference. Result has 183 places, 194 transitions, 1923 flow [2024-06-21 17:34:07,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1923, PETRI_PLACES=183, PETRI_TRANSITIONS=194} [2024-06-21 17:34:07,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 17:34:07,112 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 194 transitions, 1923 flow [2024-06-21 17:34:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:07,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:07,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:07,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:34:07,112 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:07,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash 479209845, now seen corresponding path program 3 times [2024-06-21 17:34:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:07,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897797736] [2024-06-21 17:34:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:07,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:09,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897797736] [2024-06-21 17:34:09,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897797736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:09,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:09,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807830527] [2024-06-21 17:34:09,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:09,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:09,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:09,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:34:09,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 194 transitions, 1923 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:09,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:09,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:34:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:10,273 INFO L124 PetriNetUnfolderBase]: 1996/3384 cut-off events. [2024-06-21 17:34:10,273 INFO L125 PetriNetUnfolderBase]: For 125163/125185 co-relation queries the response was YES. [2024-06-21 17:34:10,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19380 conditions, 3384 events. 1996/3384 cut-off events. For 125163/125185 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20734 event pairs, 486 based on Foata normal form. 22/3359 useless extension candidates. Maximal degree in co-relation 19295. Up to 3013 conditions per place. [2024-06-21 17:34:10,302 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 43 changer transitions 0/210 dead transitions. [2024-06-21 17:34:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 210 transitions, 2367 flow [2024-06-21 17:34:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:34:10,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:34:10,304 INFO L175 Difference]: Start difference. First operand has 183 places, 194 transitions, 1923 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:34:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 210 transitions, 2367 flow [2024-06-21 17:34:10,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 210 transitions, 2279 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:10,482 INFO L231 Difference]: Finished difference. Result has 183 places, 197 transitions, 1965 flow [2024-06-21 17:34:10,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1965, PETRI_PLACES=183, PETRI_TRANSITIONS=197} [2024-06-21 17:34:10,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 17:34:10,483 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 197 transitions, 1965 flow [2024-06-21 17:34:10,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:10,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:10,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:34:10,483 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:10,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2106160797, now seen corresponding path program 1 times [2024-06-21 17:34:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:10,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552870313] [2024-06-21 17:34:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:12,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552870313] [2024-06-21 17:34:12,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552870313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319678786] [2024-06-21 17:34:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:12,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:12,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:12,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:12,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 197 transitions, 1965 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:12,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:12,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:12,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:13,703 INFO L124 PetriNetUnfolderBase]: 2157/3619 cut-off events. [2024-06-21 17:34:13,703 INFO L125 PetriNetUnfolderBase]: For 123787/123789 co-relation queries the response was YES. [2024-06-21 17:34:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20713 conditions, 3619 events. 2157/3619 cut-off events. For 123787/123789 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22025 event pairs, 514 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 20628. Up to 3378 conditions per place. [2024-06-21 17:34:13,736 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-21 17:34:13,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 224 transitions, 2639 flow [2024-06-21 17:34:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:34:13,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:34:13,739 INFO L175 Difference]: Start difference. First operand has 183 places, 197 transitions, 1965 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:34:13,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 224 transitions, 2639 flow [2024-06-21 17:34:13,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 224 transitions, 2531 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:13,876 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 1999 flow [2024-06-21 17:34:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1999, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-21 17:34:13,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 17:34:13,877 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 1999 flow [2024-06-21 17:34:13,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:13,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:13,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:34:13,877 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:13,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2106280953, now seen corresponding path program 1 times [2024-06-21 17:34:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987661399] [2024-06-21 17:34:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:15,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987661399] [2024-06-21 17:34:15,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987661399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:15,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:15,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:15,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988956198] [2024-06-21 17:34:15,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:15,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:15,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:15,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:15,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:15,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:15,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:17,019 INFO L124 PetriNetUnfolderBase]: 2172/3640 cut-off events. [2024-06-21 17:34:17,019 INFO L125 PetriNetUnfolderBase]: For 130420/130422 co-relation queries the response was YES. [2024-06-21 17:34:17,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21090 conditions, 3640 events. 2172/3640 cut-off events. For 130420/130422 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22086 event pairs, 510 based on Foata normal form. 2/3640 useless extension candidates. Maximal degree in co-relation 21004. Up to 3391 conditions per place. [2024-06-21 17:34:17,051 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 23 changer transitions 0/232 dead transitions. [2024-06-21 17:34:17,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2701 flow [2024-06-21 17:34:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:34:17,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:34:17,053 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 1999 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:34:17,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2701 flow [2024-06-21 17:34:17,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 232 transitions, 2639 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 17:34:17,215 INFO L231 Difference]: Finished difference. Result has 191 places, 212 transitions, 2105 flow [2024-06-21 17:34:17,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2105, PETRI_PLACES=191, PETRI_TRANSITIONS=212} [2024-06-21 17:34:17,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 17:34:17,216 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 212 transitions, 2105 flow [2024-06-21 17:34:17,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:17,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:17,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:34:17,217 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:17,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2106280767, now seen corresponding path program 2 times [2024-06-21 17:34:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208237897] [2024-06-21 17:34:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:17,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:18,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208237897] [2024-06-21 17:34:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208237897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:18,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511081589] [2024-06-21 17:34:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:19,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:19,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:19,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 212 transitions, 2105 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:19,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:19,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:19,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:20,212 INFO L124 PetriNetUnfolderBase]: 2177/3649 cut-off events. [2024-06-21 17:34:20,213 INFO L125 PetriNetUnfolderBase]: For 135414/135416 co-relation queries the response was YES. [2024-06-21 17:34:20,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21469 conditions, 3649 events. 2177/3649 cut-off events. For 135414/135416 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22130 event pairs, 515 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 21380. Up to 3420 conditions per place. [2024-06-21 17:34:20,244 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-21 17:34:20,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 231 transitions, 2645 flow [2024-06-21 17:34:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:34:20,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 17:34:20,245 INFO L175 Difference]: Start difference. First operand has 191 places, 212 transitions, 2105 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:34:20,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 231 transitions, 2645 flow [2024-06-21 17:34:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 231 transitions, 2595 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 17:34:20,380 INFO L231 Difference]: Finished difference. Result has 196 places, 215 transitions, 2149 flow [2024-06-21 17:34:20,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2149, PETRI_PLACES=196, PETRI_TRANSITIONS=215} [2024-06-21 17:34:20,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 17:34:20,380 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 215 transitions, 2149 flow [2024-06-21 17:34:20,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:20,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:20,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:20,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:34:20,386 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:20,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 479215797, now seen corresponding path program 2 times [2024-06-21 17:34:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:20,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014678302] [2024-06-21 17:34:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:22,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014678302] [2024-06-21 17:34:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014678302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:22,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:22,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423727313] [2024-06-21 17:34:22,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:22,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:22,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 215 transitions, 2149 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:22,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:23,487 INFO L124 PetriNetUnfolderBase]: 2187/3664 cut-off events. [2024-06-21 17:34:23,487 INFO L125 PetriNetUnfolderBase]: For 142013/142017 co-relation queries the response was YES. [2024-06-21 17:34:23,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21669 conditions, 3664 events. 2187/3664 cut-off events. For 142013/142017 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22233 event pairs, 516 based on Foata normal form. 4/3666 useless extension candidates. Maximal degree in co-relation 21578. Up to 3408 conditions per place. [2024-06-21 17:34:23,516 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 202 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-21 17:34:23,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 232 transitions, 2775 flow [2024-06-21 17:34:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:34:23,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:34:23,520 INFO L175 Difference]: Start difference. First operand has 196 places, 215 transitions, 2149 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:34:23,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 232 transitions, 2775 flow [2024-06-21 17:34:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 232 transitions, 2701 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:23,707 INFO L231 Difference]: Finished difference. Result has 196 places, 218 transitions, 2171 flow [2024-06-21 17:34:23,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2171, PETRI_PLACES=196, PETRI_TRANSITIONS=218} [2024-06-21 17:34:23,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 17:34:23,708 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 218 transitions, 2171 flow [2024-06-21 17:34:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:23,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:23,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:23,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:34:23,709 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:23,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 478978461, now seen corresponding path program 3 times [2024-06-21 17:34:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061439690] [2024-06-21 17:34:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:25,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:25,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061439690] [2024-06-21 17:34:25,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061439690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:25,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:25,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527088224] [2024-06-21 17:34:25,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:25,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:25,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:25,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 218 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:25,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:25,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:26,799 INFO L124 PetriNetUnfolderBase]: 2184/3659 cut-off events. [2024-06-21 17:34:26,799 INFO L125 PetriNetUnfolderBase]: For 144663/144665 co-relation queries the response was YES. [2024-06-21 17:34:26,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21699 conditions, 3659 events. 2184/3659 cut-off events. For 144663/144665 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22225 event pairs, 515 based on Foata normal form. 1/3658 useless extension candidates. Maximal degree in co-relation 21608. Up to 3416 conditions per place. [2024-06-21 17:34:26,833 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 24 changer transitions 0/237 dead transitions. [2024-06-21 17:34:26,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 237 transitions, 2689 flow [2024-06-21 17:34:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:34:26,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:34:26,835 INFO L175 Difference]: Start difference. First operand has 196 places, 218 transitions, 2171 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:34:26,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 237 transitions, 2689 flow [2024-06-21 17:34:27,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 237 transitions, 2597 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 17:34:27,040 INFO L231 Difference]: Finished difference. Result has 199 places, 218 transitions, 2141 flow [2024-06-21 17:34:27,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2141, PETRI_PLACES=199, PETRI_TRANSITIONS=218} [2024-06-21 17:34:27,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 17:34:27,041 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 218 transitions, 2141 flow [2024-06-21 17:34:27,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:27,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:27,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:27,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:34:27,041 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:27,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash 497746977, now seen corresponding path program 3 times [2024-06-21 17:34:27,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:27,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481274023] [2024-06-21 17:34:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:27,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481274023] [2024-06-21 17:34:29,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481274023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:29,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:34:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891912223] [2024-06-21 17:34:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:34:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:34:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:34:29,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:29,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 218 transitions, 2141 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:29,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:29,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:29,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:30,124 INFO L124 PetriNetUnfolderBase]: 2178/3651 cut-off events. [2024-06-21 17:34:30,124 INFO L125 PetriNetUnfolderBase]: For 148387/148389 co-relation queries the response was YES. [2024-06-21 17:34:30,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21598 conditions, 3651 events. 2178/3651 cut-off events. For 148387/148389 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22092 event pairs, 510 based on Foata normal form. 2/3651 useless extension candidates. Maximal degree in co-relation 21506. Up to 3399 conditions per place. [2024-06-21 17:34:30,157 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 205 selfloop transitions, 26 changer transitions 0/236 dead transitions. [2024-06-21 17:34:30,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 236 transitions, 2651 flow [2024-06-21 17:34:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:34:30,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 17:34:30,168 INFO L175 Difference]: Start difference. First operand has 199 places, 218 transitions, 2141 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:34:30,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 236 transitions, 2651 flow [2024-06-21 17:34:30,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 236 transitions, 2579 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:34:30,363 INFO L231 Difference]: Finished difference. Result has 200 places, 218 transitions, 2131 flow [2024-06-21 17:34:30,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2131, PETRI_PLACES=200, PETRI_TRANSITIONS=218} [2024-06-21 17:34:30,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 17:34:30,364 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 218 transitions, 2131 flow [2024-06-21 17:34:30,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:30,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:30,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:34:30,366 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:30,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash 479224725, now seen corresponding path program 1 times [2024-06-21 17:34:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:30,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862896632] [2024-06-21 17:34:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:33,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:33,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862896632] [2024-06-21 17:34:33,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862896632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:33,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:33,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:33,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673372680] [2024-06-21 17:34:33,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:33,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:33,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:34:33,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 218 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:33,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:34:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:34,071 INFO L124 PetriNetUnfolderBase]: 2018/3432 cut-off events. [2024-06-21 17:34:34,072 INFO L125 PetriNetUnfolderBase]: For 144692/144703 co-relation queries the response was YES. [2024-06-21 17:34:34,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20555 conditions, 3432 events. 2018/3432 cut-off events. For 144692/144703 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21099 event pairs, 477 based on Foata normal form. 11/3407 useless extension candidates. Maximal degree in co-relation 20462. Up to 3128 conditions per place. [2024-06-21 17:34:34,103 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 200 selfloop transitions, 12 changer transitions 0/233 dead transitions. [2024-06-21 17:34:34,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 233 transitions, 2619 flow [2024-06-21 17:34:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:34:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:34:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:34:34,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:34:34,105 INFO L175 Difference]: Start difference. First operand has 200 places, 218 transitions, 2131 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:34:34,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 233 transitions, 2619 flow [2024-06-21 17:34:34,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 233 transitions, 2557 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:34,312 INFO L231 Difference]: Finished difference. Result has 200 places, 220 transitions, 2132 flow [2024-06-21 17:34:34,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2132, PETRI_PLACES=200, PETRI_TRANSITIONS=220} [2024-06-21 17:34:34,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 17:34:34,321 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 220 transitions, 2132 flow [2024-06-21 17:34:34,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:34,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:34,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:34:34,321 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:34,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash 866476668, now seen corresponding path program 1 times [2024-06-21 17:34:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9885891] [2024-06-21 17:34:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:36,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9885891] [2024-06-21 17:34:36,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9885891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:36,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831483444] [2024-06-21 17:34:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:36,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:36,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:36,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 220 transitions, 2132 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:36,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:36,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:36,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:38,007 INFO L124 PetriNetUnfolderBase]: 2183/3658 cut-off events. [2024-06-21 17:34:38,008 INFO L125 PetriNetUnfolderBase]: For 145950/145952 co-relation queries the response was YES. [2024-06-21 17:34:38,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21575 conditions, 3658 events. 2183/3658 cut-off events. For 145950/145952 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22116 event pairs, 508 based on Foata normal form. 2/3658 useless extension candidates. Maximal degree in co-relation 21482. Up to 3357 conditions per place. [2024-06-21 17:34:38,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-21 17:34:38,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 252 transitions, 2874 flow [2024-06-21 17:34:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:34:38,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 17:34:38,042 INFO L175 Difference]: Start difference. First operand has 200 places, 220 transitions, 2132 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:34:38,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 252 transitions, 2874 flow [2024-06-21 17:34:38,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 252 transitions, 2827 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:38,203 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2257 flow [2024-06-21 17:34:38,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2257, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-21 17:34:38,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 17:34:38,204 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2257 flow [2024-06-21 17:34:38,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:38,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:38,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:38,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:34:38,205 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:38,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1692028428, now seen corresponding path program 2 times [2024-06-21 17:34:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:38,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111712215] [2024-06-21 17:34:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:38,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:40,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111712215] [2024-06-21 17:34:40,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111712215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:40,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:40,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:40,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348553953] [2024-06-21 17:34:40,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:40,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:40,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:40,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:40,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2257 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:40,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:40,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:40,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:41,635 INFO L124 PetriNetUnfolderBase]: 2209/3698 cut-off events. [2024-06-21 17:34:41,635 INFO L125 PetriNetUnfolderBase]: For 155596/155598 co-relation queries the response was YES. [2024-06-21 17:34:41,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22374 conditions, 3698 events. 2209/3698 cut-off events. For 155596/155598 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22386 event pairs, 508 based on Foata normal form. 2/3698 useless extension candidates. Maximal degree in co-relation 22280. Up to 3422 conditions per place. [2024-06-21 17:34:41,664 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 34 changer transitions 0/255 dead transitions. [2024-06-21 17:34:41,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 255 transitions, 3009 flow [2024-06-21 17:34:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:34:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:34:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:34:41,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:34:41,666 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2257 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:34:41,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 255 transitions, 3009 flow [2024-06-21 17:34:41,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 255 transitions, 2925 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:41,864 INFO L231 Difference]: Finished difference. Result has 208 places, 232 transitions, 2345 flow [2024-06-21 17:34:41,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2345, PETRI_PLACES=208, PETRI_TRANSITIONS=232} [2024-06-21 17:34:41,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 17:34:41,864 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 232 transitions, 2345 flow [2024-06-21 17:34:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:41,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:41,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:34:41,865 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:41,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash 870201318, now seen corresponding path program 3 times [2024-06-21 17:34:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079209481] [2024-06-21 17:34:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079209481] [2024-06-21 17:34:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079209481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:43,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:43,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:43,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274701266] [2024-06-21 17:34:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:43,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:43,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:43,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:43,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 232 transitions, 2345 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:44,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:44,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:44,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:45,257 INFO L124 PetriNetUnfolderBase]: 2203/3690 cut-off events. [2024-06-21 17:34:45,257 INFO L125 PetriNetUnfolderBase]: For 158246/158248 co-relation queries the response was YES. [2024-06-21 17:34:45,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22358 conditions, 3690 events. 2203/3690 cut-off events. For 158246/158248 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22335 event pairs, 508 based on Foata normal form. 2/3690 useless extension candidates. Maximal degree in co-relation 22262. Up to 3417 conditions per place. [2024-06-21 17:34:45,352 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 35 changer transitions 0/256 dead transitions. [2024-06-21 17:34:45,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 256 transitions, 2907 flow [2024-06-21 17:34:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 17:34:45,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-21 17:34:45,354 INFO L175 Difference]: Start difference. First operand has 208 places, 232 transitions, 2345 flow. Second operand 10 states and 156 transitions. [2024-06-21 17:34:45,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 256 transitions, 2907 flow [2024-06-21 17:34:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 256 transitions, 2825 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:34:45,612 INFO L231 Difference]: Finished difference. Result has 214 places, 232 transitions, 2339 flow [2024-06-21 17:34:45,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2339, PETRI_PLACES=214, PETRI_TRANSITIONS=232} [2024-06-21 17:34:45,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 17:34:45,619 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 2339 flow [2024-06-21 17:34:45,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:45,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:45,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:45,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:34:45,620 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:45,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1963431804, now seen corresponding path program 4 times [2024-06-21 17:34:45,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:45,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109358538] [2024-06-21 17:34:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:45,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:47,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:47,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109358538] [2024-06-21 17:34:47,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109358538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:47,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471970668] [2024-06-21 17:34:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:47,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:47,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:47,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 2339 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:48,899 INFO L124 PetriNetUnfolderBase]: 2213/3708 cut-off events. [2024-06-21 17:34:48,900 INFO L125 PetriNetUnfolderBase]: For 163549/163551 co-relation queries the response was YES. [2024-06-21 17:34:48,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 3708 events. 2213/3708 cut-off events. For 163549/163551 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22499 event pairs, 507 based on Foata normal form. 2/3708 useless extension candidates. Maximal degree in co-relation 22480. Up to 3396 conditions per place. [2024-06-21 17:34:48,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 45 changer transitions 0/260 dead transitions. [2024-06-21 17:34:48,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 260 transitions, 3067 flow [2024-06-21 17:34:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:34:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:34:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:34:48,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:34:48,940 INFO L175 Difference]: Start difference. First operand has 214 places, 232 transitions, 2339 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:34:48,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 260 transitions, 3067 flow [2024-06-21 17:34:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 260 transitions, 2989 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:34:49,184 INFO L231 Difference]: Finished difference. Result has 212 places, 235 transitions, 2407 flow [2024-06-21 17:34:49,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2407, PETRI_PLACES=212, PETRI_TRANSITIONS=235} [2024-06-21 17:34:49,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 17:34:49,184 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 235 transitions, 2407 flow [2024-06-21 17:34:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:49,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:49,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:34:49,185 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:49,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1963437384, now seen corresponding path program 5 times [2024-06-21 17:34:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:49,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935556214] [2024-06-21 17:34:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935556214] [2024-06-21 17:34:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935556214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:51,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:51,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:51,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094374979] [2024-06-21 17:34:51,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:51,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:51,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:51,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 2407 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:51,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:51,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:51,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:52,639 INFO L124 PetriNetUnfolderBase]: 2223/3726 cut-off events. [2024-06-21 17:34:52,639 INFO L125 PetriNetUnfolderBase]: For 169453/169455 co-relation queries the response was YES. [2024-06-21 17:34:52,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22848 conditions, 3726 events. 2223/3726 cut-off events. For 169453/169455 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22625 event pairs, 507 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 22749. Up to 3406 conditions per place. [2024-06-21 17:34:52,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-21 17:34:52,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 267 transitions, 3165 flow [2024-06-21 17:34:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:34:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:34:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:34:52,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:34:52,680 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 2407 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:34:52,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 267 transitions, 3165 flow [2024-06-21 17:34:52,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 267 transitions, 3037 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:34:52,971 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2443 flow [2024-06-21 17:34:52,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2443, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-21 17:34:52,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 17:34:52,972 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2443 flow [2024-06-21 17:34:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:52,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:52,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:34:52,973 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:52,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1970789034, now seen corresponding path program 6 times [2024-06-21 17:34:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085535794] [2024-06-21 17:34:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:52,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:55,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:55,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085535794] [2024-06-21 17:34:55,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085535794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:55,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:55,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:55,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528699276] [2024-06-21 17:34:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:55,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:55,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:55,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2443 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:55,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:55,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:55,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:56,459 INFO L124 PetriNetUnfolderBase]: 2217/3719 cut-off events. [2024-06-21 17:34:56,460 INFO L125 PetriNetUnfolderBase]: For 166608/166612 co-relation queries the response was YES. [2024-06-21 17:34:56,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22650 conditions, 3719 events. 2217/3719 cut-off events. For 166608/166612 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22601 event pairs, 512 based on Foata normal form. 4/3721 useless extension candidates. Maximal degree in co-relation 22551. Up to 3401 conditions per place. [2024-06-21 17:34:56,496 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 49 changer transitions 0/260 dead transitions. [2024-06-21 17:34:56,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 260 transitions, 3009 flow [2024-06-21 17:34:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:34:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:34:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 17:34:56,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 17:34:56,497 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2443 flow. Second operand 9 states and 143 transitions. [2024-06-21 17:34:56,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 260 transitions, 3009 flow [2024-06-21 17:34:56,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 260 transitions, 2859 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:34:56,716 INFO L231 Difference]: Finished difference. Result has 216 places, 238 transitions, 2397 flow [2024-06-21 17:34:56,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2397, PETRI_PLACES=216, PETRI_TRANSITIONS=238} [2024-06-21 17:34:56,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 17:34:56,717 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 238 transitions, 2397 flow [2024-06-21 17:34:56,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:56,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:56,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:34:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:34:56,717 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:56,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash -747902516, now seen corresponding path program 1 times [2024-06-21 17:34:56,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:56,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298409872] [2024-06-21 17:34:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:59,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:59,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298409872] [2024-06-21 17:34:59,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298409872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:59,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:59,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:34:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125409460] [2024-06-21 17:34:59,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:59,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:34:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:34:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:34:59,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:34:59,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 238 transitions, 2397 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:59,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:59,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:34:59,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:01,229 INFO L124 PetriNetUnfolderBase]: 2230/3740 cut-off events. [2024-06-21 17:35:01,229 INFO L125 PetriNetUnfolderBase]: For 166367/166373 co-relation queries the response was YES. [2024-06-21 17:35:01,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 3740 events. 2230/3740 cut-off events. For 166367/166373 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22715 event pairs, 519 based on Foata normal form. 7/3744 useless extension candidates. Maximal degree in co-relation 22673. Up to 3345 conditions per place. [2024-06-21 17:35:01,262 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 57 changer transitions 0/279 dead transitions. [2024-06-21 17:35:01,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3411 flow [2024-06-21 17:35:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:35:01,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:35:01,264 INFO L175 Difference]: Start difference. First operand has 216 places, 238 transitions, 2397 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:35:01,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3411 flow [2024-06-21 17:35:01,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3283 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 17:35:01,516 INFO L231 Difference]: Finished difference. Result has 216 places, 247 transitions, 2551 flow [2024-06-21 17:35:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2551, PETRI_PLACES=216, PETRI_TRANSITIONS=247} [2024-06-21 17:35:01,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 17:35:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 247 transitions, 2551 flow [2024-06-21 17:35:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:01,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:35:01,517 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:01,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -747782546, now seen corresponding path program 2 times [2024-06-21 17:35:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:01,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941896231] [2024-06-21 17:35:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:01,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:04,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:04,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941896231] [2024-06-21 17:35:04,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941896231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:04,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:04,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576888304] [2024-06-21 17:35:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:04,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:04,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 247 transitions, 2551 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:04,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:04,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:04,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:06,161 INFO L124 PetriNetUnfolderBase]: 2240/3757 cut-off events. [2024-06-21 17:35:06,161 INFO L125 PetriNetUnfolderBase]: For 173799/173807 co-relation queries the response was YES. [2024-06-21 17:35:06,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23285 conditions, 3757 events. 2240/3757 cut-off events. For 173799/173807 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22893 event pairs, 511 based on Foata normal form. 9/3764 useless extension candidates. Maximal degree in co-relation 23185. Up to 3429 conditions per place. [2024-06-21 17:35:06,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 42 changer transitions 0/279 dead transitions. [2024-06-21 17:35:06,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3264 flow [2024-06-21 17:35:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:35:06,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:35:06,200 INFO L175 Difference]: Start difference. First operand has 216 places, 247 transitions, 2551 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:35:06,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3264 flow [2024-06-21 17:35:06,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 279 transitions, 3149 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 17:35:06,467 INFO L231 Difference]: Finished difference. Result has 221 places, 253 transitions, 2619 flow [2024-06-21 17:35:06,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2619, PETRI_PLACES=221, PETRI_TRANSITIONS=253} [2024-06-21 17:35:06,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 17:35:06,468 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 253 transitions, 2619 flow [2024-06-21 17:35:06,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:06,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:06,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:06,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:35:06,469 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:06,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash -255365996, now seen corresponding path program 1 times [2024-06-21 17:35:06,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:06,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831207064] [2024-06-21 17:35:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:06,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:09,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:09,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831207064] [2024-06-21 17:35:09,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831207064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:09,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:09,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:09,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71351915] [2024-06-21 17:35:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:09,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:09,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 253 transitions, 2619 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:09,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:09,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:10,851 INFO L124 PetriNetUnfolderBase]: 2282/3815 cut-off events. [2024-06-21 17:35:10,851 INFO L125 PetriNetUnfolderBase]: For 188081/188089 co-relation queries the response was YES. [2024-06-21 17:35:10,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24053 conditions, 3815 events. 2282/3815 cut-off events. For 188081/188089 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23193 event pairs, 513 based on Foata normal form. 10/3823 useless extension candidates. Maximal degree in co-relation 23951. Up to 3444 conditions per place. [2024-06-21 17:35:10,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 52 changer transitions 0/299 dead transitions. [2024-06-21 17:35:10,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 299 transitions, 3681 flow [2024-06-21 17:35:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:35:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:35:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:35:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 17:35:10,889 INFO L175 Difference]: Start difference. First operand has 221 places, 253 transitions, 2619 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:35:10,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 299 transitions, 3681 flow [2024-06-21 17:35:11,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 299 transitions, 3567 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:11,229 INFO L231 Difference]: Finished difference. Result has 227 places, 266 transitions, 2798 flow [2024-06-21 17:35:11,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2798, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2024-06-21 17:35:11,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 17:35:11,230 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 2798 flow [2024-06-21 17:35:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:11,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:11,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:11,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:35:11,230 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:11,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash -570413690, now seen corresponding path program 2 times [2024-06-21 17:35:11,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:11,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652732160] [2024-06-21 17:35:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:11,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:14,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:14,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652732160] [2024-06-21 17:35:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652732160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:14,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:14,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774345350] [2024-06-21 17:35:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:14,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:14,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:14,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:14,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 2798 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:14,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:14,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:14,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:15,479 INFO L124 PetriNetUnfolderBase]: 2334/3889 cut-off events. [2024-06-21 17:35:15,479 INFO L125 PetriNetUnfolderBase]: For 202537/202545 co-relation queries the response was YES. [2024-06-21 17:35:15,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25194 conditions, 3889 events. 2334/3889 cut-off events. For 202537/202545 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23584 event pairs, 517 based on Foata normal form. 10/3897 useless extension candidates. Maximal degree in co-relation 25090. Up to 3492 conditions per place. [2024-06-21 17:35:15,513 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 64 changer transitions 0/310 dead transitions. [2024-06-21 17:35:15,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 310 transitions, 3952 flow [2024-06-21 17:35:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:35:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:35:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:35:15,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:35:15,515 INFO L175 Difference]: Start difference. First operand has 227 places, 266 transitions, 2798 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:35:15,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 310 transitions, 3952 flow [2024-06-21 17:35:15,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 3758 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:15,867 INFO L231 Difference]: Finished difference. Result has 231 places, 282 transitions, 2976 flow [2024-06-21 17:35:15,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2976, PETRI_PLACES=231, PETRI_TRANSITIONS=282} [2024-06-21 17:35:15,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 17:35:15,868 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 282 transitions, 2976 flow [2024-06-21 17:35:15,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:15,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:15,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:35:15,869 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:15,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -250724366, now seen corresponding path program 3 times [2024-06-21 17:35:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:15,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494142956] [2024-06-21 17:35:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:18,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494142956] [2024-06-21 17:35:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494142956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:18,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:18,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774367462] [2024-06-21 17:35:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:19,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 282 transitions, 2976 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:19,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:19,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:19,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:20,225 INFO L124 PetriNetUnfolderBase]: 2328/3881 cut-off events. [2024-06-21 17:35:20,225 INFO L125 PetriNetUnfolderBase]: For 204467/204475 co-relation queries the response was YES. [2024-06-21 17:35:20,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25015 conditions, 3881 events. 2328/3881 cut-off events. For 204467/204475 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23546 event pairs, 516 based on Foata normal form. 10/3889 useless extension candidates. Maximal degree in co-relation 24909. Up to 3487 conditions per place. [2024-06-21 17:35:20,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 66 changer transitions 0/313 dead transitions. [2024-06-21 17:35:20,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 3908 flow [2024-06-21 17:35:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:35:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:35:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 17:35:20,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:35:20,266 INFO L175 Difference]: Start difference. First operand has 231 places, 282 transitions, 2976 flow. Second operand 11 states and 176 transitions. [2024-06-21 17:35:20,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 3908 flow [2024-06-21 17:35:20,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 3822 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:35:20,541 INFO L231 Difference]: Finished difference. Result has 239 places, 282 transitions, 3028 flow [2024-06-21 17:35:20,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3028, PETRI_PLACES=239, PETRI_TRANSITIONS=282} [2024-06-21 17:35:20,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 17:35:20,542 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 282 transitions, 3028 flow [2024-06-21 17:35:20,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:20,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:20,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:35:20,543 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:20,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:20,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1690783200, now seen corresponding path program 3 times [2024-06-21 17:35:20,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064204300] [2024-06-21 17:35:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:20,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:23,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:23,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064204300] [2024-06-21 17:35:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064204300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:23,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:23,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678550674] [2024-06-21 17:35:23,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:23,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 282 transitions, 3028 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:23,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:25,215 INFO L124 PetriNetUnfolderBase]: 2341/3905 cut-off events. [2024-06-21 17:35:25,215 INFO L125 PetriNetUnfolderBase]: For 211354/211362 co-relation queries the response was YES. [2024-06-21 17:35:25,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25361 conditions, 3905 events. 2341/3905 cut-off events. For 211354/211362 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23756 event pairs, 520 based on Foata normal form. 9/3912 useless extension candidates. Maximal degree in co-relation 25254. Up to 3560 conditions per place. [2024-06-21 17:35:25,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 54 changer transitions 0/312 dead transitions. [2024-06-21 17:35:25,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 312 transitions, 3932 flow [2024-06-21 17:35:25,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:35:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:35:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:35:25,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:35:25,257 INFO L175 Difference]: Start difference. First operand has 239 places, 282 transitions, 3028 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:35:25,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 312 transitions, 3932 flow [2024-06-21 17:35:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 312 transitions, 3774 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:35:25,540 INFO L231 Difference]: Finished difference. Result has 241 places, 288 transitions, 3106 flow [2024-06-21 17:35:25,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3106, PETRI_PLACES=241, PETRI_TRANSITIONS=288} [2024-06-21 17:35:25,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 17:35:25,541 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 288 transitions, 3106 flow [2024-06-21 17:35:25,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:25,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:25,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:25,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:35:25,541 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:25,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1690536936, now seen corresponding path program 1 times [2024-06-21 17:35:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:25,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186668183] [2024-06-21 17:35:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:25,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:28,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186668183] [2024-06-21 17:35:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186668183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:28,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:35:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672882047] [2024-06-21 17:35:28,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:28,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:35:28,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:35:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:35:29,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:35:29,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 288 transitions, 3106 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:29,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:29,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:35:29,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:30,362 INFO L124 PetriNetUnfolderBase]: 2232/3751 cut-off events. [2024-06-21 17:35:30,363 INFO L125 PetriNetUnfolderBase]: For 236984/236995 co-relation queries the response was YES. [2024-06-21 17:35:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24799 conditions, 3751 events. 2232/3751 cut-off events. For 236984/236995 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23025 event pairs, 484 based on Foata normal form. 21/3732 useless extension candidates. Maximal degree in co-relation 24690. Up to 3259 conditions per place. [2024-06-21 17:35:30,398 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 46 changer transitions 0/317 dead transitions. [2024-06-21 17:35:30,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 317 transitions, 3778 flow [2024-06-21 17:35:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:35:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:35:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:35:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:35:30,400 INFO L175 Difference]: Start difference. First operand has 241 places, 288 transitions, 3106 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:35:30,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 317 transitions, 3778 flow [2024-06-21 17:35:30,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 317 transitions, 3630 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:35:30,812 INFO L231 Difference]: Finished difference. Result has 244 places, 289 transitions, 3074 flow [2024-06-21 17:35:30,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3074, PETRI_PLACES=244, PETRI_TRANSITIONS=289} [2024-06-21 17:35:30,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 17:35:30,813 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 289 transitions, 3074 flow [2024-06-21 17:35:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:30,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:30,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:35:30,813 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1040005182, now seen corresponding path program 4 times [2024-06-21 17:35:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144151110] [2024-06-21 17:35:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:33,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144151110] [2024-06-21 17:35:33,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144151110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:33,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:33,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:33,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710132822] [2024-06-21 17:35:33,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:33,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:33,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:33,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:33,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 289 transitions, 3074 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:33,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:33,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:33,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:35,007 INFO L124 PetriNetUnfolderBase]: 2398/3988 cut-off events. [2024-06-21 17:35:35,007 INFO L125 PetriNetUnfolderBase]: For 228045/228064 co-relation queries the response was YES. [2024-06-21 17:35:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26155 conditions, 3988 events. 2398/3988 cut-off events. For 228045/228064 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24217 event pairs, 529 based on Foata normal form. 15/3999 useless extension candidates. Maximal degree in co-relation 26045. Up to 3569 conditions per place. [2024-06-21 17:35:35,050 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 84 changer transitions 0/324 dead transitions. [2024-06-21 17:35:35,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 324 transitions, 4158 flow [2024-06-21 17:35:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:35:35,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:35:35,052 INFO L175 Difference]: Start difference. First operand has 244 places, 289 transitions, 3074 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:35:35,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 324 transitions, 4158 flow [2024-06-21 17:35:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 324 transitions, 4064 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:35:35,466 INFO L231 Difference]: Finished difference. Result has 245 places, 295 transitions, 3270 flow [2024-06-21 17:35:35,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3270, PETRI_PLACES=245, PETRI_TRANSITIONS=295} [2024-06-21 17:35:35,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 17:35:35,467 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 295 transitions, 3270 flow [2024-06-21 17:35:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:35,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:35,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:35,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:35:35,468 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:35,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash -582263382, now seen corresponding path program 5 times [2024-06-21 17:35:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:35,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499895795] [2024-06-21 17:35:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:38,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:38,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499895795] [2024-06-21 17:35:38,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499895795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:38,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:38,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086980983] [2024-06-21 17:35:38,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:38,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:38,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:38,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 295 transitions, 3270 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:38,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:38,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:38,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:39,680 INFO L124 PetriNetUnfolderBase]: 2403/3997 cut-off events. [2024-06-21 17:35:39,680 INFO L125 PetriNetUnfolderBase]: For 234663/234682 co-relation queries the response was YES. [2024-06-21 17:35:39,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26357 conditions, 3997 events. 2403/3997 cut-off events. For 234663/234682 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24337 event pairs, 527 based on Foata normal form. 15/4008 useless extension candidates. Maximal degree in co-relation 26246. Up to 3575 conditions per place. [2024-06-21 17:35:39,723 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 83 changer transitions 0/328 dead transitions. [2024-06-21 17:35:39,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 328 transitions, 4440 flow [2024-06-21 17:35:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:35:39,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:35:39,724 INFO L175 Difference]: Start difference. First operand has 245 places, 295 transitions, 3270 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:35:39,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 328 transitions, 4440 flow [2024-06-21 17:35:40,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 328 transitions, 4250 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:35:40,084 INFO L231 Difference]: Finished difference. Result has 249 places, 298 transitions, 3316 flow [2024-06-21 17:35:40,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=249, PETRI_TRANSITIONS=298} [2024-06-21 17:35:40,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 17:35:40,085 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 298 transitions, 3316 flow [2024-06-21 17:35:40,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:40,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:40,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:35:40,086 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:40,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 851751642, now seen corresponding path program 4 times [2024-06-21 17:35:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438649791] [2024-06-21 17:35:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:43,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:43,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438649791] [2024-06-21 17:35:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438649791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:43,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:43,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496659591] [2024-06-21 17:35:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:43,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:43,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:43,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:43,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 298 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:43,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:43,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:44,576 INFO L124 PetriNetUnfolderBase]: 2397/3989 cut-off events. [2024-06-21 17:35:44,576 INFO L125 PetriNetUnfolderBase]: For 239349/239368 co-relation queries the response was YES. [2024-06-21 17:35:44,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26251 conditions, 3989 events. 2397/3989 cut-off events. For 239349/239368 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24252 event pairs, 534 based on Foata normal form. 16/4001 useless extension candidates. Maximal degree in co-relation 26139. Up to 3640 conditions per place. [2024-06-21 17:35:44,611 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 52 changer transitions 0/327 dead transitions. [2024-06-21 17:35:44,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 327 transitions, 4192 flow [2024-06-21 17:35:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:35:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:35:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:35:44,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:35:44,613 INFO L175 Difference]: Start difference. First operand has 249 places, 298 transitions, 3316 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:35:44,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 327 transitions, 4192 flow [2024-06-21 17:35:45,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 327 transitions, 3884 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:35:45,023 INFO L231 Difference]: Finished difference. Result has 252 places, 300 transitions, 3154 flow [2024-06-21 17:35:45,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3154, PETRI_PLACES=252, PETRI_TRANSITIONS=300} [2024-06-21 17:35:45,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 17:35:45,024 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 300 transitions, 3154 flow [2024-06-21 17:35:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:45,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:45,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:35:45,024 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:45,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 851751456, now seen corresponding path program 6 times [2024-06-21 17:35:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:45,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596915272] [2024-06-21 17:35:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:47,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:47,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596915272] [2024-06-21 17:35:47,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596915272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:47,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:47,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:47,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517796507] [2024-06-21 17:35:47,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:47,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:47,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:47,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:47,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 300 transitions, 3154 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:47,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:47,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:47,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:49,142 INFO L124 PetriNetUnfolderBase]: 2394/3989 cut-off events. [2024-06-21 17:35:49,143 INFO L125 PetriNetUnfolderBase]: For 241001/241020 co-relation queries the response was YES. [2024-06-21 17:35:49,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26079 conditions, 3989 events. 2394/3989 cut-off events. For 241001/241020 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24326 event pairs, 536 based on Foata normal form. 15/4000 useless extension candidates. Maximal degree in co-relation 25965. Up to 3648 conditions per place. [2024-06-21 17:35:49,187 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 49 changer transitions 0/323 dead transitions. [2024-06-21 17:35:49,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 323 transitions, 3860 flow [2024-06-21 17:35:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:35:49,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:35:49,189 INFO L175 Difference]: Start difference. First operand has 252 places, 300 transitions, 3154 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:35:49,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 323 transitions, 3860 flow [2024-06-21 17:35:49,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 323 transitions, 3736 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:49,540 INFO L231 Difference]: Finished difference. Result has 255 places, 300 transitions, 3134 flow [2024-06-21 17:35:49,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3134, PETRI_PLACES=255, PETRI_TRANSITIONS=300} [2024-06-21 17:35:49,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 17:35:49,542 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 300 transitions, 3134 flow [2024-06-21 17:35:49,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:49,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:49,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:35:49,543 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:49,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1079860926, now seen corresponding path program 7 times [2024-06-21 17:35:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:49,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447356305] [2024-06-21 17:35:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:49,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:51,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447356305] [2024-06-21 17:35:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447356305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:51,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:51,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117920109] [2024-06-21 17:35:51,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:51,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:51,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:51,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:51,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 300 transitions, 3134 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:51,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:51,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:51,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:53,421 INFO L124 PetriNetUnfolderBase]: 2399/3992 cut-off events. [2024-06-21 17:35:53,422 INFO L125 PetriNetUnfolderBase]: For 247910/247929 co-relation queries the response was YES. [2024-06-21 17:35:53,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26198 conditions, 3992 events. 2399/3992 cut-off events. For 247910/247929 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24289 event pairs, 534 based on Foata normal form. 15/4003 useless extension candidates. Maximal degree in co-relation 26083. Up to 3570 conditions per place. [2024-06-21 17:35:53,464 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 90 changer transitions 0/327 dead transitions. [2024-06-21 17:35:53,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 327 transitions, 4024 flow [2024-06-21 17:35:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:35:53,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:35:53,465 INFO L175 Difference]: Start difference. First operand has 255 places, 300 transitions, 3134 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:35:53,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 327 transitions, 4024 flow [2024-06-21 17:35:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 327 transitions, 3922 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:35:53,786 INFO L231 Difference]: Finished difference. Result has 256 places, 303 transitions, 3262 flow [2024-06-21 17:35:53,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=256, PETRI_TRANSITIONS=303} [2024-06-21 17:35:53,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 17:35:53,795 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 303 transitions, 3262 flow [2024-06-21 17:35:53,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:53,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:53,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:35:53,796 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:53,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1206251646, now seen corresponding path program 8 times [2024-06-21 17:35:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:53,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217191722] [2024-06-21 17:35:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:35:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:35:56,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:35:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217191722] [2024-06-21 17:35:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217191722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:35:56,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:35:56,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:35:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738542051] [2024-06-21 17:35:56,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:35:56,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:35:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:35:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:35:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:35:56,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:35:56,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 303 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:56,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:35:56,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:35:56,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:35:57,512 INFO L124 PetriNetUnfolderBase]: 2417/4019 cut-off events. [2024-06-21 17:35:57,513 INFO L125 PetriNetUnfolderBase]: For 257645/257664 co-relation queries the response was YES. [2024-06-21 17:35:57,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26707 conditions, 4019 events. 2417/4019 cut-off events. For 257645/257664 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24458 event pairs, 534 based on Foata normal form. 15/4030 useless extension candidates. Maximal degree in co-relation 26591. Up to 3666 conditions per place. [2024-06-21 17:35:57,556 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 63 changer transitions 0/332 dead transitions. [2024-06-21 17:35:57,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 332 transitions, 4256 flow [2024-06-21 17:35:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:35:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:35:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:35:57,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:35:57,557 INFO L175 Difference]: Start difference. First operand has 256 places, 303 transitions, 3262 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:35:57,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 332 transitions, 4256 flow [2024-06-21 17:35:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 332 transitions, 4080 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:35:57,944 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 3394 flow [2024-06-21 17:35:57,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3394, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2024-06-21 17:35:57,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 17:35:57,945 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 3394 flow [2024-06-21 17:35:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:35:57,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:35:57,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:35:57,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:35:57,945 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:35:57,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:35:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1206430392, now seen corresponding path program 5 times [2024-06-21 17:35:57,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:35:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586625990] [2024-06-21 17:35:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:35:57,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:35:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:00,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586625990] [2024-06-21 17:36:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586625990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:00,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327871250] [2024-06-21 17:36:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:00,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:00,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:00,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:00,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 3394 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:00,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:00,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:00,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:01,602 INFO L124 PetriNetUnfolderBase]: 2443/4059 cut-off events. [2024-06-21 17:36:01,602 INFO L125 PetriNetUnfolderBase]: For 272188/272207 co-relation queries the response was YES. [2024-06-21 17:36:01,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27153 conditions, 4059 events. 2443/4059 cut-off events. For 272188/272207 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24713 event pairs, 522 based on Foata normal form. 16/4071 useless extension candidates. Maximal degree in co-relation 27035. Up to 3586 conditions per place. [2024-06-21 17:36:01,649 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 85 changer transitions 0/349 dead transitions. [2024-06-21 17:36:01,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 349 transitions, 4594 flow [2024-06-21 17:36:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:36:01,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 17:36:01,650 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 3394 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:36:01,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 349 transitions, 4594 flow [2024-06-21 17:36:02,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 349 transitions, 4480 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:36:02,055 INFO L231 Difference]: Finished difference. Result has 266 places, 324 transitions, 3664 flow [2024-06-21 17:36:02,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3664, PETRI_PLACES=266, PETRI_TRANSITIONS=324} [2024-06-21 17:36:02,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 17:36:02,055 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 324 transitions, 3664 flow [2024-06-21 17:36:02,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:02,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:02,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:02,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:36:02,056 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:02,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash -913523136, now seen corresponding path program 6 times [2024-06-21 17:36:02,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:02,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145314255] [2024-06-21 17:36:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:02,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:04,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145314255] [2024-06-21 17:36:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145314255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291409541] [2024-06-21 17:36:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:04,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:04,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 324 transitions, 3664 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:04,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:04,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:04,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:06,030 INFO L124 PetriNetUnfolderBase]: 2437/4051 cut-off events. [2024-06-21 17:36:06,030 INFO L125 PetriNetUnfolderBase]: For 276408/276427 co-relation queries the response was YES. [2024-06-21 17:36:06,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27452 conditions, 4051 events. 2437/4051 cut-off events. For 276408/276427 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24723 event pairs, 530 based on Foata normal form. 16/4063 useless extension candidates. Maximal degree in co-relation 27332. Up to 3704 conditions per place. [2024-06-21 17:36:06,078 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 52 changer transitions 0/344 dead transitions. [2024-06-21 17:36:06,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 344 transitions, 4402 flow [2024-06-21 17:36:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:36:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:36:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:36:06,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 17:36:06,079 INFO L175 Difference]: Start difference. First operand has 266 places, 324 transitions, 3664 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:36:06,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 344 transitions, 4402 flow [2024-06-21 17:36:06,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 344 transitions, 4282 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 17:36:06,610 INFO L231 Difference]: Finished difference. Result has 271 places, 324 transitions, 3654 flow [2024-06-21 17:36:06,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3654, PETRI_PLACES=271, PETRI_TRANSITIONS=324} [2024-06-21 17:36:06,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 17:36:06,611 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 324 transitions, 3654 flow [2024-06-21 17:36:06,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:06,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:06,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:06,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:36:06,611 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:06,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1206014496, now seen corresponding path program 9 times [2024-06-21 17:36:06,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:06,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394892063] [2024-06-21 17:36:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:09,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394892063] [2024-06-21 17:36:09,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394892063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:09,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:09,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638662329] [2024-06-21 17:36:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:09,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:09,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:09,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 324 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:09,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:09,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:09,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:11,024 INFO L124 PetriNetUnfolderBase]: 2434/4047 cut-off events. [2024-06-21 17:36:11,025 INFO L125 PetriNetUnfolderBase]: For 277869/277888 co-relation queries the response was YES. [2024-06-21 17:36:11,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27261 conditions, 4047 events. 2434/4047 cut-off events. For 277869/277888 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24693 event pairs, 530 based on Foata normal form. 15/4058 useless extension candidates. Maximal degree in co-relation 27139. Up to 3691 conditions per place. [2024-06-21 17:36:11,071 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 64 changer transitions 0/345 dead transitions. [2024-06-21 17:36:11,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 345 transitions, 4396 flow [2024-06-21 17:36:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:36:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:36:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 17:36:11,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 17:36:11,072 INFO L175 Difference]: Start difference. First operand has 271 places, 324 transitions, 3654 flow. Second operand 10 states and 153 transitions. [2024-06-21 17:36:11,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 345 transitions, 4396 flow [2024-06-21 17:36:11,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 345 transitions, 4244 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:36:11,623 INFO L231 Difference]: Finished difference. Result has 274 places, 324 transitions, 3636 flow [2024-06-21 17:36:11,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3636, PETRI_PLACES=274, PETRI_TRANSITIONS=324} [2024-06-21 17:36:11,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 17:36:11,623 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 324 transitions, 3636 flow [2024-06-21 17:36:11,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:11,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:11,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:11,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:36:11,626 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:11,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash 736831324, now seen corresponding path program 10 times [2024-06-21 17:36:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:11,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406357711] [2024-06-21 17:36:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406357711] [2024-06-21 17:36:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406357711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:14,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:14,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:14,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246235019] [2024-06-21 17:36:14,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:14,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:14,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 324 transitions, 3636 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:14,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:14,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:14,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:15,548 INFO L124 PetriNetUnfolderBase]: 2431/4043 cut-off events. [2024-06-21 17:36:15,548 INFO L125 PetriNetUnfolderBase]: For 282721/282740 co-relation queries the response was YES. [2024-06-21 17:36:15,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27260 conditions, 4043 events. 2431/4043 cut-off events. For 282721/282740 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24641 event pairs, 530 based on Foata normal form. 15/4054 useless extension candidates. Maximal degree in co-relation 27137. Up to 3626 conditions per place. [2024-06-21 17:36:15,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 87 changer transitions 0/351 dead transitions. [2024-06-21 17:36:15,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 351 transitions, 4550 flow [2024-06-21 17:36:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:36:15,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:36:15,598 INFO L175 Difference]: Start difference. First operand has 274 places, 324 transitions, 3636 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:36:15,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 351 transitions, 4550 flow [2024-06-21 17:36:16,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 4370 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 17:36:16,072 INFO L231 Difference]: Finished difference. Result has 271 places, 324 transitions, 3644 flow [2024-06-21 17:36:16,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3644, PETRI_PLACES=271, PETRI_TRANSITIONS=324} [2024-06-21 17:36:16,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 17:36:16,072 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 324 transitions, 3644 flow [2024-06-21 17:36:16,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:16,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:16,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:36:16,073 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:16,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 736594174, now seen corresponding path program 11 times [2024-06-21 17:36:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049978711] [2024-06-21 17:36:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:18,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:18,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049978711] [2024-06-21 17:36:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049978711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:18,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688753770] [2024-06-21 17:36:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:18,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:18,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:18,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 324 transitions, 3644 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:18,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:18,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:18,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:20,291 INFO L124 PetriNetUnfolderBase]: 2428/4035 cut-off events. [2024-06-21 17:36:20,292 INFO L125 PetriNetUnfolderBase]: For 287663/287682 co-relation queries the response was YES. [2024-06-21 17:36:20,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27319 conditions, 4035 events. 2428/4035 cut-off events. For 287663/287682 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24587 event pairs, 530 based on Foata normal form. 15/4046 useless extension candidates. Maximal degree in co-relation 27196. Up to 3623 conditions per place. [2024-06-21 17:36:20,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 90 changer transitions 0/361 dead transitions. [2024-06-21 17:36:20,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 361 transitions, 4608 flow [2024-06-21 17:36:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:36:20,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 17:36:20,337 INFO L175 Difference]: Start difference. First operand has 271 places, 324 transitions, 3644 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:36:20,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 361 transitions, 4608 flow [2024-06-21 17:36:20,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 361 transitions, 4342 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 17:36:20,967 INFO L231 Difference]: Finished difference. Result has 272 places, 324 transitions, 3580 flow [2024-06-21 17:36:20,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3580, PETRI_PLACES=272, PETRI_TRANSITIONS=324} [2024-06-21 17:36:20,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 17:36:20,968 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 324 transitions, 3580 flow [2024-06-21 17:36:20,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:20,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:20,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:20,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:36:20,969 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:20,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash 959197300, now seen corresponding path program 7 times [2024-06-21 17:36:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:20,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631814999] [2024-06-21 17:36:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631814999] [2024-06-21 17:36:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631814999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:23,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:23,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6221649] [2024-06-21 17:36:23,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:23,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:23,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 324 transitions, 3580 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:23,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:23,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:23,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:24,752 INFO L124 PetriNetUnfolderBase]: 2438/4054 cut-off events. [2024-06-21 17:36:24,752 INFO L125 PetriNetUnfolderBase]: For 283779/283812 co-relation queries the response was YES. [2024-06-21 17:36:24,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27296 conditions, 4054 events. 2438/4054 cut-off events. For 283779/283812 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24723 event pairs, 538 based on Foata normal form. 24/4074 useless extension candidates. Maximal degree in co-relation 27173. Up to 3579 conditions per place. [2024-06-21 17:36:24,796 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-21 17:36:24,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 346 transitions, 4650 flow [2024-06-21 17:36:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:36:24,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:36:24,798 INFO L175 Difference]: Start difference. First operand has 272 places, 324 transitions, 3580 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:36:24,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 346 transitions, 4650 flow [2024-06-21 17:36:25,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 346 transitions, 4440 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 17:36:25,320 INFO L231 Difference]: Finished difference. Result has 268 places, 327 transitions, 3614 flow [2024-06-21 17:36:25,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=268, PETRI_TRANSITIONS=327} [2024-06-21 17:36:25,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 17:36:25,321 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 327 transitions, 3614 flow [2024-06-21 17:36:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:25,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:25,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:36:25,322 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:25,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash -844085940, now seen corresponding path program 8 times [2024-06-21 17:36:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:25,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608792590] [2024-06-21 17:36:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:27,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:27,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608792590] [2024-06-21 17:36:27,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608792590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:27,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:27,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:27,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017153608] [2024-06-21 17:36:27,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:27,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:27,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:27,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:27,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 327 transitions, 3614 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:27,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:27,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:27,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:29,218 INFO L124 PetriNetUnfolderBase]: 2464/4092 cut-off events. [2024-06-21 17:36:29,218 INFO L125 PetriNetUnfolderBase]: For 274364/274397 co-relation queries the response was YES. [2024-06-21 17:36:29,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27487 conditions, 4092 events. 2464/4092 cut-off events. For 274364/274397 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24977 event pairs, 539 based on Foata normal form. 24/4112 useless extension candidates. Maximal degree in co-relation 27366. Up to 3604 conditions per place. [2024-06-21 17:36:29,263 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 92 changer transitions 0/352 dead transitions. [2024-06-21 17:36:29,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 352 transitions, 4741 flow [2024-06-21 17:36:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:36:29,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:36:29,265 INFO L175 Difference]: Start difference. First operand has 268 places, 327 transitions, 3614 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:36:29,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 352 transitions, 4741 flow [2024-06-21 17:36:29,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 4427 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 17:36:29,705 INFO L231 Difference]: Finished difference. Result has 270 places, 333 transitions, 3597 flow [2024-06-21 17:36:29,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3597, PETRI_PLACES=270, PETRI_TRANSITIONS=333} [2024-06-21 17:36:29,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 17:36:29,706 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 333 transitions, 3597 flow [2024-06-21 17:36:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:29,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:29,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:36:29,707 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:29,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash 737010070, now seen corresponding path program 9 times [2024-06-21 17:36:29,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:29,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976401451] [2024-06-21 17:36:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:32,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976401451] [2024-06-21 17:36:32,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976401451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:32,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:32,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978958810] [2024-06-21 17:36:32,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:32,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:32,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 333 transitions, 3597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:32,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:32,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:33,514 INFO L124 PetriNetUnfolderBase]: 2458/4081 cut-off events. [2024-06-21 17:36:33,514 INFO L125 PetriNetUnfolderBase]: For 275159/275178 co-relation queries the response was YES. [2024-06-21 17:36:33,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27060 conditions, 4081 events. 2458/4081 cut-off events. For 275159/275178 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24915 event pairs, 519 based on Foata normal form. 16/4093 useless extension candidates. Maximal degree in co-relation 26939. Up to 3599 conditions per place. [2024-06-21 17:36:33,558 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 96 changer transitions 0/357 dead transitions. [2024-06-21 17:36:33,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 357 transitions, 4645 flow [2024-06-21 17:36:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:36:33,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:36:33,559 INFO L175 Difference]: Start difference. First operand has 270 places, 333 transitions, 3597 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:36:33,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 357 transitions, 4645 flow [2024-06-21 17:36:33,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 357 transitions, 4494 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 17:36:33,987 INFO L231 Difference]: Finished difference. Result has 274 places, 333 transitions, 3648 flow [2024-06-21 17:36:33,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3648, PETRI_PLACES=274, PETRI_TRANSITIONS=333} [2024-06-21 17:36:33,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 17:36:33,987 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 333 transitions, 3648 flow [2024-06-21 17:36:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:33,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:33,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:36:33,988 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:33,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 736594360, now seen corresponding path program 10 times [2024-06-21 17:36:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058719163] [2024-06-21 17:36:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:36,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:36,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058719163] [2024-06-21 17:36:36,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058719163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:36,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:36,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:36,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821160957] [2024-06-21 17:36:36,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:36,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:36,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:36,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:36,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 333 transitions, 3648 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:36,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:36,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:36,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:37,844 INFO L124 PetriNetUnfolderBase]: 2452/4073 cut-off events. [2024-06-21 17:36:37,844 INFO L125 PetriNetUnfolderBase]: For 278007/278026 co-relation queries the response was YES. [2024-06-21 17:36:37,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26994 conditions, 4073 events. 2452/4073 cut-off events. For 278007/278026 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24806 event pairs, 535 based on Foata normal form. 16/4085 useless extension candidates. Maximal degree in co-relation 26872. Up to 3714 conditions per place. [2024-06-21 17:36:37,893 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 57 changer transitions 0/356 dead transitions. [2024-06-21 17:36:37,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 356 transitions, 4420 flow [2024-06-21 17:36:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:36:37,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:36:37,895 INFO L175 Difference]: Start difference. First operand has 274 places, 333 transitions, 3648 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:36:37,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 356 transitions, 4420 flow [2024-06-21 17:36:38,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 356 transitions, 4240 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:36:38,491 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 3596 flow [2024-06-21 17:36:38,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3596, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-21 17:36:38,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 17:36:38,492 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 3596 flow [2024-06-21 17:36:38,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:38,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:38,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:36:38,493 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:38,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 559462654, now seen corresponding path program 12 times [2024-06-21 17:36:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:38,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040509232] [2024-06-21 17:36:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:41,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040509232] [2024-06-21 17:36:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040509232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:41,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:41,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:41,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614563904] [2024-06-21 17:36:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:41,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:41,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 3596 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:41,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:41,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:41,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:42,960 INFO L124 PetriNetUnfolderBase]: 2449/4064 cut-off events. [2024-06-21 17:36:42,960 INFO L125 PetriNetUnfolderBase]: For 272790/272798 co-relation queries the response was YES. [2024-06-21 17:36:42,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26748 conditions, 4064 events. 2449/4064 cut-off events. For 272790/272798 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24746 event pairs, 531 based on Foata normal form. 9/4071 useless extension candidates. Maximal degree in co-relation 26626. Up to 3654 conditions per place. [2024-06-21 17:36:43,008 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 90 changer transitions 0/372 dead transitions. [2024-06-21 17:36:43,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 372 transitions, 4446 flow [2024-06-21 17:36:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:36:43,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:36:43,010 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 3596 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:36:43,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 372 transitions, 4446 flow [2024-06-21 17:36:43,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 372 transitions, 4294 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:36:43,554 INFO L231 Difference]: Finished difference. Result has 277 places, 333 transitions, 3642 flow [2024-06-21 17:36:43,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3642, PETRI_PLACES=277, PETRI_TRANSITIONS=333} [2024-06-21 17:36:43,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 17:36:43,555 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 333 transitions, 3642 flow [2024-06-21 17:36:43,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:43,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:43,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:36:43,556 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:43,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:43,556 INFO L85 PathProgramCache]: Analyzing trace with hash 559699990, now seen corresponding path program 11 times [2024-06-21 17:36:43,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337305633] [2024-06-21 17:36:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:43,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:46,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337305633] [2024-06-21 17:36:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337305633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049979611] [2024-06-21 17:36:46,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:46,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 333 transitions, 3642 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:47,208 INFO L124 PetriNetUnfolderBase]: 2443/4058 cut-off events. [2024-06-21 17:36:47,208 INFO L125 PetriNetUnfolderBase]: For 263120/263128 co-relation queries the response was YES. [2024-06-21 17:36:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26545 conditions, 4058 events. 2443/4058 cut-off events. For 263120/263128 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24755 event pairs, 526 based on Foata normal form. 10/4066 useless extension candidates. Maximal degree in co-relation 26424. Up to 3651 conditions per place. [2024-06-21 17:36:47,255 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 279 selfloop transitions, 73 changer transitions 0/357 dead transitions. [2024-06-21 17:36:47,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 357 transitions, 4554 flow [2024-06-21 17:36:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:36:47,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:36:47,257 INFO L175 Difference]: Start difference. First operand has 277 places, 333 transitions, 3642 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:36:47,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 357 transitions, 4554 flow [2024-06-21 17:36:47,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 357 transitions, 4338 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 17:36:47,788 INFO L231 Difference]: Finished difference. Result has 275 places, 333 transitions, 3588 flow [2024-06-21 17:36:47,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3588, PETRI_PLACES=275, PETRI_TRANSITIONS=333} [2024-06-21 17:36:47,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 17:36:47,789 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 333 transitions, 3588 flow [2024-06-21 17:36:47,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:47,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:47,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:47,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:36:47,789 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:47,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 559462840, now seen corresponding path program 12 times [2024-06-21 17:36:47,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:47,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231451843] [2024-06-21 17:36:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:47,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:50,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:50,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231451843] [2024-06-21 17:36:50,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231451843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:50,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:50,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:36:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837368567] [2024-06-21 17:36:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:50,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:36:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:36:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:36:50,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:36:50,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 333 transitions, 3588 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:50,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:50,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:36:50,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:52,150 INFO L124 PetriNetUnfolderBase]: 2437/4050 cut-off events. [2024-06-21 17:36:52,150 INFO L125 PetriNetUnfolderBase]: For 244879/244887 co-relation queries the response was YES. [2024-06-21 17:36:52,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26106 conditions, 4050 events. 2437/4050 cut-off events. For 244879/244887 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24706 event pairs, 525 based on Foata normal form. 10/4058 useless extension candidates. Maximal degree in co-relation 25985. Up to 3646 conditions per place. [2024-06-21 17:36:52,191 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 280 selfloop transitions, 78 changer transitions 0/363 dead transitions. [2024-06-21 17:36:52,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 363 transitions, 4390 flow [2024-06-21 17:36:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:36:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:36:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:36:52,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:36:52,193 INFO L175 Difference]: Start difference. First operand has 275 places, 333 transitions, 3588 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:36:52,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 363 transitions, 4390 flow [2024-06-21 17:36:52,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 363 transitions, 4243 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:36:52,682 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 3611 flow [2024-06-21 17:36:52,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3611, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-21 17:36:52,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 17:36:52,683 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 3611 flow [2024-06-21 17:36:52,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:52,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:52,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:52,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:36:52,684 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:52,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash 959206228, now seen corresponding path program 2 times [2024-06-21 17:36:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:52,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711616499] [2024-06-21 17:36:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:36:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:36:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:36:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711616499] [2024-06-21 17:36:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711616499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:36:56,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:36:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:36:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103925959] [2024-06-21 17:36:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:36:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:36:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:36:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:36:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:36:56,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:36:56,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 3611 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:56,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:36:56,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:36:56,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:36:57,415 INFO L124 PetriNetUnfolderBase]: 2321/3882 cut-off events. [2024-06-21 17:36:57,416 INFO L125 PetriNetUnfolderBase]: For 266628/266652 co-relation queries the response was YES. [2024-06-21 17:36:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25376 conditions, 3882 events. 2321/3882 cut-off events. For 266628/266652 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23892 event pairs, 497 based on Foata normal form. 30/3858 useless extension candidates. Maximal degree in co-relation 25255. Up to 3358 conditions per place. [2024-06-21 17:36:57,460 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 50 changer transitions 0/353 dead transitions. [2024-06-21 17:36:57,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 353 transitions, 4301 flow [2024-06-21 17:36:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:36:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:36:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:36:57,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 17:36:57,462 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 3611 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:36:57,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 353 transitions, 4301 flow [2024-06-21 17:36:57,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 353 transitions, 4080 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 17:36:57,902 INFO L231 Difference]: Finished difference. Result has 274 places, 334 transitions, 3516 flow [2024-06-21 17:36:57,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=274, PETRI_TRANSITIONS=334} [2024-06-21 17:36:57,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 17:36:57,903 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 334 transitions, 3516 flow [2024-06-21 17:36:57,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:36:57,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:36:57,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:36:57,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:36:57,904 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:36:57,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:36:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash 973491028, now seen corresponding path program 3 times [2024-06-21 17:36:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:36:57,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940865993] [2024-06-21 17:36:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:36:57,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:36:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:01,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940865993] [2024-06-21 17:37:01,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940865993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:01,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:01,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:01,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123163210] [2024-06-21 17:37:01,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:01,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:01,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:01,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:37:01,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 334 transitions, 3516 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:01,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:01,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:37:01,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:02,552 INFO L124 PetriNetUnfolderBase]: 2398/4002 cut-off events. [2024-06-21 17:37:02,552 INFO L125 PetriNetUnfolderBase]: For 269463/269485 co-relation queries the response was YES. [2024-06-21 17:37:02,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26488 conditions, 4002 events. 2398/4002 cut-off events. For 269463/269485 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24665 event pairs, 507 based on Foata normal form. 26/3981 useless extension candidates. Maximal degree in co-relation 26368. Up to 3317 conditions per place. [2024-06-21 17:37:02,593 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 251 selfloop transitions, 54 changer transitions 0/358 dead transitions. [2024-06-21 17:37:02,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 358 transitions, 4390 flow [2024-06-21 17:37:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:37:02,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:37:02,594 INFO L175 Difference]: Start difference. First operand has 274 places, 334 transitions, 3516 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:37:02,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 358 transitions, 4390 flow [2024-06-21 17:37:03,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 358 transitions, 4286 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:03,094 INFO L231 Difference]: Finished difference. Result has 276 places, 336 transitions, 3566 flow [2024-06-21 17:37:03,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3566, PETRI_PLACES=276, PETRI_TRANSITIONS=336} [2024-06-21 17:37:03,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 17:37:03,095 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 336 transitions, 3566 flow [2024-06-21 17:37:03,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:03,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:03,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:03,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:37:03,095 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:03,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 559708918, now seen corresponding path program 4 times [2024-06-21 17:37:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:03,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682786400] [2024-06-21 17:37:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:03,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682786400] [2024-06-21 17:37:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682786400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:06,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106917192] [2024-06-21 17:37:06,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:06,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 17:37:06,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 336 transitions, 3566 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:06,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:06,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 17:37:06,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:07,708 INFO L124 PetriNetUnfolderBase]: 2367/3965 cut-off events. [2024-06-21 17:37:07,709 INFO L125 PetriNetUnfolderBase]: For 259521/259534 co-relation queries the response was YES. [2024-06-21 17:37:07,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25620 conditions, 3965 events. 2367/3965 cut-off events. For 259521/259534 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24502 event pairs, 505 based on Foata normal form. 21/3944 useless extension candidates. Maximal degree in co-relation 25499. Up to 3397 conditions per place. [2024-06-21 17:37:07,753 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 263 selfloop transitions, 45 changer transitions 0/361 dead transitions. [2024-06-21 17:37:07,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 361 transitions, 4272 flow [2024-06-21 17:37:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:37:07,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:37:07,755 INFO L175 Difference]: Start difference. First operand has 276 places, 336 transitions, 3566 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:37:07,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 361 transitions, 4272 flow [2024-06-21 17:37:08,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 361 transitions, 4199 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:08,112 INFO L231 Difference]: Finished difference. Result has 280 places, 336 transitions, 3593 flow [2024-06-21 17:37:08,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3593, PETRI_PLACES=280, PETRI_TRANSITIONS=336} [2024-06-21 17:37:08,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 17:37:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 336 transitions, 3593 flow [2024-06-21 17:37:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:08,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:08,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:37:08,114 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:08,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1031425374, now seen corresponding path program 1 times [2024-06-21 17:37:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913830028] [2024-06-21 17:37:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:08,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913830028] [2024-06-21 17:37:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913830028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:10,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:10,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232033082] [2024-06-21 17:37:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:10,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:10,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:10,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 336 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:10,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:10,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:11,738 INFO L124 PetriNetUnfolderBase]: 2535/4203 cut-off events. [2024-06-21 17:37:11,738 INFO L125 PetriNetUnfolderBase]: For 244616/244618 co-relation queries the response was YES. [2024-06-21 17:37:11,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26972 conditions, 4203 events. 2535/4203 cut-off events. For 244616/244618 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25698 event pairs, 516 based on Foata normal form. 2/4203 useless extension candidates. Maximal degree in co-relation 26849. Up to 3886 conditions per place. [2024-06-21 17:37:11,781 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 32 changer transitions 0/368 dead transitions. [2024-06-21 17:37:11,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 368 transitions, 4623 flow [2024-06-21 17:37:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:37:11,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:37:11,783 INFO L175 Difference]: Start difference. First operand has 280 places, 336 transitions, 3593 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:37:11,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 368 transitions, 4623 flow [2024-06-21 17:37:12,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 368 transitions, 4522 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:12,252 INFO L231 Difference]: Finished difference. Result has 282 places, 340 transitions, 3657 flow [2024-06-21 17:37:12,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3657, PETRI_PLACES=282, PETRI_TRANSITIONS=340} [2024-06-21 17:37:12,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 17:37:12,253 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 340 transitions, 3657 flow [2024-06-21 17:37:12,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:12,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:12,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:12,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:37:12,253 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:12,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1090969404, now seen corresponding path program 2 times [2024-06-21 17:37:12,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:12,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076851137] [2024-06-21 17:37:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:14,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:14,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076851137] [2024-06-21 17:37:14,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076851137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:14,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:14,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:14,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501677068] [2024-06-21 17:37:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:14,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:14,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:14,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:14,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:14,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 340 transitions, 3657 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:14,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:14,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:14,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:15,924 INFO L124 PetriNetUnfolderBase]: 2543/4215 cut-off events. [2024-06-21 17:37:15,924 INFO L125 PetriNetUnfolderBase]: For 251004/251006 co-relation queries the response was YES. [2024-06-21 17:37:15,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27121 conditions, 4215 events. 2543/4215 cut-off events. For 251004/251006 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25782 event pairs, 554 based on Foata normal form. 2/4215 useless extension candidates. Maximal degree in co-relation 26997. Up to 3935 conditions per place. [2024-06-21 17:37:15,971 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 29 changer transitions 0/364 dead transitions. [2024-06-21 17:37:15,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 364 transitions, 4485 flow [2024-06-21 17:37:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:37:15,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:37:15,973 INFO L175 Difference]: Start difference. First operand has 282 places, 340 transitions, 3657 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:37:15,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 364 transitions, 4485 flow [2024-06-21 17:37:16,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 364 transitions, 4379 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 17:37:16,569 INFO L231 Difference]: Finished difference. Result has 286 places, 342 transitions, 3668 flow [2024-06-21 17:37:16,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3668, PETRI_PLACES=286, PETRI_TRANSITIONS=342} [2024-06-21 17:37:16,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 17:37:16,570 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 342 transitions, 3668 flow [2024-06-21 17:37:16,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:16,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:16,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:16,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:37:16,571 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:16,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:16,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1206260574, now seen corresponding path program 3 times [2024-06-21 17:37:16,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:16,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200301846] [2024-06-21 17:37:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:16,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:18,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:18,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200301846] [2024-06-21 17:37:18,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200301846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:18,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:18,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:18,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570021785] [2024-06-21 17:37:18,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:18,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:18,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:18,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:18,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 342 transitions, 3668 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:18,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:18,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:18,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:20,193 INFO L124 PetriNetUnfolderBase]: 2551/4227 cut-off events. [2024-06-21 17:37:20,194 INFO L125 PetriNetUnfolderBase]: For 258030/258032 co-relation queries the response was YES. [2024-06-21 17:37:20,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27234 conditions, 4227 events. 2551/4227 cut-off events. For 258030/258032 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25873 event pairs, 554 based on Foata normal form. 2/4227 useless extension candidates. Maximal degree in co-relation 27108. Up to 3964 conditions per place. [2024-06-21 17:37:20,242 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 21 changer transitions 0/362 dead transitions. [2024-06-21 17:37:20,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 362 transitions, 4468 flow [2024-06-21 17:37:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 17:37:20,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 17:37:20,243 INFO L175 Difference]: Start difference. First operand has 286 places, 342 transitions, 3668 flow. Second operand 8 states and 125 transitions. [2024-06-21 17:37:20,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 362 transitions, 4468 flow [2024-06-21 17:37:20,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 362 transitions, 4387 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:20,692 INFO L231 Difference]: Finished difference. Result has 288 places, 344 transitions, 3676 flow [2024-06-21 17:37:20,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=288, PETRI_TRANSITIONS=344} [2024-06-21 17:37:20,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 17:37:20,693 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 344 transitions, 3676 flow [2024-06-21 17:37:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:20,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:20,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:37:20,694 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -913092546, now seen corresponding path program 1 times [2024-06-21 17:37:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545500989] [2024-06-21 17:37:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:20,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:23,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:23,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545500989] [2024-06-21 17:37:23,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545500989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:23,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:23,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320641434] [2024-06-21 17:37:23,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:23,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:23,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:23,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:23,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 344 transitions, 3676 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:23,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:23,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:23,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:25,326 INFO L124 PetriNetUnfolderBase]: 2559/4235 cut-off events. [2024-06-21 17:37:25,326 INFO L125 PetriNetUnfolderBase]: For 264989/264991 co-relation queries the response was YES. [2024-06-21 17:37:25,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27372 conditions, 4235 events. 2559/4235 cut-off events. For 264989/264991 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25858 event pairs, 532 based on Foata normal form. 2/4235 useless extension candidates. Maximal degree in co-relation 27245. Up to 3953 conditions per place. [2024-06-21 17:37:25,376 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 28 changer transitions 0/367 dead transitions. [2024-06-21 17:37:25,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 367 transitions, 4496 flow [2024-06-21 17:37:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:37:25,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:37:25,377 INFO L175 Difference]: Start difference. First operand has 288 places, 344 transitions, 3676 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:37:25,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 367 transitions, 4496 flow [2024-06-21 17:37:25,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 367 transitions, 4427 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:25,836 INFO L231 Difference]: Finished difference. Result has 290 places, 346 transitions, 3714 flow [2024-06-21 17:37:25,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3714, PETRI_PLACES=290, PETRI_TRANSITIONS=346} [2024-06-21 17:37:25,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 17:37:25,837 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 346 transitions, 3714 flow [2024-06-21 17:37:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:25,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:25,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:25,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:37:25,838 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:25,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 736840252, now seen corresponding path program 4 times [2024-06-21 17:37:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984773861] [2024-06-21 17:37:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:28,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984773861] [2024-06-21 17:37:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984773861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:28,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:28,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:28,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572864761] [2024-06-21 17:37:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:28,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:28,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:28,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:28,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 346 transitions, 3714 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:28,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:28,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:28,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:29,436 INFO L124 PetriNetUnfolderBase]: 2554/4232 cut-off events. [2024-06-21 17:37:29,436 INFO L125 PetriNetUnfolderBase]: For 267050/267052 co-relation queries the response was YES. [2024-06-21 17:37:29,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27340 conditions, 4232 events. 2554/4232 cut-off events. For 267050/267052 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25887 event pairs, 515 based on Foata normal form. 2/4232 useless extension candidates. Maximal degree in co-relation 27212. Up to 3927 conditions per place. [2024-06-21 17:37:29,487 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 30 changer transitions 0/371 dead transitions. [2024-06-21 17:37:29,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 371 transitions, 4516 flow [2024-06-21 17:37:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:37:29,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:37:29,489 INFO L175 Difference]: Start difference. First operand has 290 places, 346 transitions, 3714 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:37:29,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 371 transitions, 4516 flow [2024-06-21 17:37:30,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 4401 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:30,017 INFO L231 Difference]: Finished difference. Result has 291 places, 346 transitions, 3670 flow [2024-06-21 17:37:30,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3670, PETRI_PLACES=291, PETRI_TRANSITIONS=346} [2024-06-21 17:37:30,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 17:37:30,017 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 346 transitions, 3670 flow [2024-06-21 17:37:30,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:30,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:30,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:30,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:37:30,018 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:30,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash 737024950, now seen corresponding path program 2 times [2024-06-21 17:37:30,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:30,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115944114] [2024-06-21 17:37:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:30,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:32,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115944114] [2024-06-21 17:37:32,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115944114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:32,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:32,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:32,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944781309] [2024-06-21 17:37:32,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:32,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:32,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:32,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 346 transitions, 3670 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:32,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:32,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:34,385 INFO L124 PetriNetUnfolderBase]: 2562/4240 cut-off events. [2024-06-21 17:37:34,385 INFO L125 PetriNetUnfolderBase]: For 273779/273781 co-relation queries the response was YES. [2024-06-21 17:37:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27460 conditions, 4240 events. 2562/4240 cut-off events. For 273779/273781 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25908 event pairs, 531 based on Foata normal form. 2/4240 useless extension candidates. Maximal degree in co-relation 27331. Up to 3952 conditions per place. [2024-06-21 17:37:34,437 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 333 selfloop transitions, 30 changer transitions 0/368 dead transitions. [2024-06-21 17:37:34,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 368 transitions, 4494 flow [2024-06-21 17:37:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:37:34,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:37:34,439 INFO L175 Difference]: Start difference. First operand has 291 places, 346 transitions, 3670 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:37:34,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 368 transitions, 4494 flow [2024-06-21 17:37:34,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 368 transitions, 4425 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:34,950 INFO L231 Difference]: Finished difference. Result has 292 places, 348 transitions, 3719 flow [2024-06-21 17:37:34,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3719, PETRI_PLACES=292, PETRI_TRANSITIONS=348} [2024-06-21 17:37:34,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 17:37:34,950 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 348 transitions, 3719 flow [2024-06-21 17:37:34,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:34,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:34,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:34,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:37:34,951 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:34,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash 965156740, now seen corresponding path program 3 times [2024-06-21 17:37:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:34,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964081836] [2024-06-21 17:37:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:34,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:38,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:38,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964081836] [2024-06-21 17:37:38,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964081836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:38,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:38,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:38,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081647456] [2024-06-21 17:37:38,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:38,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:38,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:38,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:38,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 348 transitions, 3719 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:38,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:38,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:38,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:39,398 INFO L124 PetriNetUnfolderBase]: 2570/4257 cut-off events. [2024-06-21 17:37:39,398 INFO L125 PetriNetUnfolderBase]: For 275381/275385 co-relation queries the response was YES. [2024-06-21 17:37:39,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27668 conditions, 4257 events. 2570/4257 cut-off events. For 275381/275385 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26047 event pairs, 538 based on Foata normal form. 4/4259 useless extension candidates. Maximal degree in co-relation 27538. Up to 3970 conditions per place. [2024-06-21 17:37:39,450 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 333 selfloop transitions, 27 changer transitions 0/365 dead transitions. [2024-06-21 17:37:39,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 365 transitions, 4527 flow [2024-06-21 17:37:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:37:39,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:37:39,452 INFO L175 Difference]: Start difference. First operand has 292 places, 348 transitions, 3719 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:37:39,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 365 transitions, 4527 flow [2024-06-21 17:37:39,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 365 transitions, 4425 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:39,986 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 3730 flow [2024-06-21 17:37:39,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2024-06-21 17:37:39,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 17:37:39,987 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 3730 flow [2024-06-21 17:37:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:39,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:39,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:39,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:37:39,988 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:39,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 973496980, now seen corresponding path program 4 times [2024-06-21 17:37:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:39,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198831760] [2024-06-21 17:37:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:39,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:43,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:43,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198831760] [2024-06-21 17:37:43,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198831760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:43,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:43,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430401176] [2024-06-21 17:37:43,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:43,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:43,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:43,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:43,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:43,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 3730 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:43,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:43,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:43,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:44,266 INFO L124 PetriNetUnfolderBase]: 2565/4250 cut-off events. [2024-06-21 17:37:44,266 INFO L125 PetriNetUnfolderBase]: For 269420/269424 co-relation queries the response was YES. [2024-06-21 17:37:44,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27377 conditions, 4250 events. 2565/4250 cut-off events. For 269420/269424 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26020 event pairs, 529 based on Foata normal form. 4/4252 useless extension candidates. Maximal degree in co-relation 27246. Up to 3937 conditions per place. [2024-06-21 17:37:44,318 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 328 selfloop transitions, 34 changer transitions 0/367 dead transitions. [2024-06-21 17:37:44,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 367 transitions, 4542 flow [2024-06-21 17:37:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:37:44,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:37:44,320 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 3730 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:37:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 367 transitions, 4542 flow [2024-06-21 17:37:44,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 367 transitions, 4449 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:44,935 INFO L231 Difference]: Finished difference. Result has 296 places, 352 transitions, 3764 flow [2024-06-21 17:37:44,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3764, PETRI_PLACES=296, PETRI_TRANSITIONS=352} [2024-06-21 17:37:44,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 17:37:44,936 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 352 transitions, 3764 flow [2024-06-21 17:37:44,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:44,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:44,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:44,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:37:44,936 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:44,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1083398231, now seen corresponding path program 1 times [2024-06-21 17:37:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:44,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956091774] [2024-06-21 17:37:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:44,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:48,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:48,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956091774] [2024-06-21 17:37:48,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956091774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:48,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:48,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:48,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829930162] [2024-06-21 17:37:48,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:48,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:48,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:48,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:48,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 352 transitions, 3764 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:48,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:48,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:48,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:49,941 INFO L124 PetriNetUnfolderBase]: 2641/4379 cut-off events. [2024-06-21 17:37:49,941 INFO L125 PetriNetUnfolderBase]: For 293519/293525 co-relation queries the response was YES. [2024-06-21 17:37:49,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28172 conditions, 4379 events. 2641/4379 cut-off events. For 293519/293525 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26843 event pairs, 457 based on Foata normal form. 14/4391 useless extension candidates. Maximal degree in co-relation 28040. Up to 3762 conditions per place. [2024-06-21 17:37:49,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 59 changer transitions 0/406 dead transitions. [2024-06-21 17:37:49,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 406 transitions, 4947 flow [2024-06-21 17:37:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:37:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:37:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 17:37:49,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 17:37:49,995 INFO L175 Difference]: Start difference. First operand has 296 places, 352 transitions, 3764 flow. Second operand 11 states and 188 transitions. [2024-06-21 17:37:49,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 406 transitions, 4947 flow [2024-06-21 17:37:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 406 transitions, 4836 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:50,567 INFO L231 Difference]: Finished difference. Result has 304 places, 357 transitions, 3866 flow [2024-06-21 17:37:50,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3866, PETRI_PLACES=304, PETRI_TRANSITIONS=357} [2024-06-21 17:37:50,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 17:37:50,568 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 357 transitions, 3866 flow [2024-06-21 17:37:50,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:50,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:50,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:50,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:37:50,568 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:50,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1075988921, now seen corresponding path program 2 times [2024-06-21 17:37:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363503272] [2024-06-21 17:37:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:50,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:54,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:54,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363503272] [2024-06-21 17:37:54,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363503272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:54,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:54,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:54,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51152261] [2024-06-21 17:37:54,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:54,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:54,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:54,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 357 transitions, 3866 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:54,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:54,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:54,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:56,089 INFO L124 PetriNetUnfolderBase]: 2733/4523 cut-off events. [2024-06-21 17:37:56,089 INFO L125 PetriNetUnfolderBase]: For 302533/302539 co-relation queries the response was YES. [2024-06-21 17:37:56,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29382 conditions, 4523 events. 2733/4523 cut-off events. For 302533/302539 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27903 event pairs, 557 based on Foata normal form. 14/4535 useless extension candidates. Maximal degree in co-relation 29247. Up to 4048 conditions per place. [2024-06-21 17:37:56,136 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 346 selfloop transitions, 64 changer transitions 0/415 dead transitions. [2024-06-21 17:37:56,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 415 transitions, 5020 flow [2024-06-21 17:37:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:37:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:37:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 17:37:56,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:37:56,138 INFO L175 Difference]: Start difference. First operand has 304 places, 357 transitions, 3866 flow. Second operand 12 states and 195 transitions. [2024-06-21 17:37:56,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 415 transitions, 5020 flow [2024-06-21 17:37:56,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 415 transitions, 4844 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:37:56,670 INFO L231 Difference]: Finished difference. Result has 309 places, 370 transitions, 4016 flow [2024-06-21 17:37:56,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4016, PETRI_PLACES=309, PETRI_TRANSITIONS=370} [2024-06-21 17:37:56,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 17:37:56,671 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 370 transitions, 4016 flow [2024-06-21 17:37:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:56,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:56,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:37:56,671 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:56,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash -24656953, now seen corresponding path program 1 times [2024-06-21 17:37:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336924359] [2024-06-21 17:37:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:59,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336924359] [2024-06-21 17:37:59,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336924359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:59,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:59,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:37:59,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592393240] [2024-06-21 17:37:59,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:59,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:37:59,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:37:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:37:59,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:37:59,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 370 transitions, 4016 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:59,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:59,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:37:59,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:01,426 INFO L124 PetriNetUnfolderBase]: 2746/4551 cut-off events. [2024-06-21 17:38:01,427 INFO L125 PetriNetUnfolderBase]: For 292885/292891 co-relation queries the response was YES. [2024-06-21 17:38:01,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29520 conditions, 4551 events. 2746/4551 cut-off events. For 292885/292891 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28192 event pairs, 581 based on Foata normal form. 7/4556 useless extension candidates. Maximal degree in co-relation 29385. Up to 4124 conditions per place. [2024-06-21 17:38:01,483 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 63 changer transitions 0/415 dead transitions. [2024-06-21 17:38:01,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 415 transitions, 5222 flow [2024-06-21 17:38:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:38:01,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 17:38:01,485 INFO L175 Difference]: Start difference. First operand has 309 places, 370 transitions, 4016 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:38:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 415 transitions, 5222 flow [2024-06-21 17:38:02,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 415 transitions, 5088 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:02,178 INFO L231 Difference]: Finished difference. Result has 311 places, 376 transitions, 4140 flow [2024-06-21 17:38:02,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4140, PETRI_PLACES=311, PETRI_TRANSITIONS=376} [2024-06-21 17:38:02,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 17:38:02,179 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 376 transitions, 4140 flow [2024-06-21 17:38:02,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:02,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:02,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:38:02,180 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:02,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1359099241, now seen corresponding path program 1 times [2024-06-21 17:38:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:02,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576182718] [2024-06-21 17:38:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:02,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:05,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:05,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576182718] [2024-06-21 17:38:05,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576182718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:05,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:05,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:05,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711919561] [2024-06-21 17:38:05,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:05,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:05,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:05,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:05,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 376 transitions, 4140 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:05,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:05,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:05,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:07,383 INFO L124 PetriNetUnfolderBase]: 2782/4597 cut-off events. [2024-06-21 17:38:07,383 INFO L125 PetriNetUnfolderBase]: For 311864/311870 co-relation queries the response was YES. [2024-06-21 17:38:07,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30455 conditions, 4597 events. 2782/4597 cut-off events. For 311864/311870 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28467 event pairs, 567 based on Foata normal form. 8/4603 useless extension candidates. Maximal degree in co-relation 30319. Up to 4121 conditions per place. [2024-06-21 17:38:07,433 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 80 changer transitions 0/429 dead transitions. [2024-06-21 17:38:07,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 429 transitions, 5442 flow [2024-06-21 17:38:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:38:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:38:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 17:38:07,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 17:38:07,434 INFO L175 Difference]: Start difference. First operand has 311 places, 376 transitions, 4140 flow. Second operand 11 states and 185 transitions. [2024-06-21 17:38:07,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 429 transitions, 5442 flow [2024-06-21 17:38:08,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 429 transitions, 5287 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:08,137 INFO L231 Difference]: Finished difference. Result has 318 places, 388 transitions, 4355 flow [2024-06-21 17:38:08,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4355, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2024-06-21 17:38:08,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 17:38:08,137 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 4355 flow [2024-06-21 17:38:08,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:08,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:08,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:38:08,138 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:08,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1189586289, now seen corresponding path program 2 times [2024-06-21 17:38:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:08,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190625566] [2024-06-21 17:38:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:12,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190625566] [2024-06-21 17:38:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190625566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289351047] [2024-06-21 17:38:12,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:12,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:12,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:12,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:12,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 4355 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:12,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:12,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:12,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:13,839 INFO L124 PetriNetUnfolderBase]: 2787/4602 cut-off events. [2024-06-21 17:38:13,840 INFO L125 PetriNetUnfolderBase]: For 318899/318905 co-relation queries the response was YES. [2024-06-21 17:38:13,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31071 conditions, 4602 events. 2787/4602 cut-off events. For 318899/318905 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28445 event pairs, 577 based on Foata normal form. 7/4607 useless extension candidates. Maximal degree in co-relation 30932. Up to 4200 conditions per place. [2024-06-21 17:38:13,899 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 64 changer transitions 0/425 dead transitions. [2024-06-21 17:38:13,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 425 transitions, 5337 flow [2024-06-21 17:38:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:38:13,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:38:13,901 INFO L175 Difference]: Start difference. First operand has 318 places, 388 transitions, 4355 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:38:13,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 425 transitions, 5337 flow [2024-06-21 17:38:14,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 425 transitions, 5183 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:14,673 INFO L231 Difference]: Finished difference. Result has 321 places, 391 transitions, 4384 flow [2024-06-21 17:38:14,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4384, PETRI_PLACES=321, PETRI_TRANSITIONS=391} [2024-06-21 17:38:14,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 17:38:14,674 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 391 transitions, 4384 flow [2024-06-21 17:38:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:14,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:14,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:38:14,676 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:14,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1936870487, now seen corresponding path program 2 times [2024-06-21 17:38:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:14,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581828451] [2024-06-21 17:38:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:17,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581828451] [2024-06-21 17:38:17,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581828451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:17,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:17,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071708668] [2024-06-21 17:38:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:17,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:17,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 391 transitions, 4384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:17,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:17,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:17,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:19,826 INFO L124 PetriNetUnfolderBase]: 2823/4656 cut-off events. [2024-06-21 17:38:19,826 INFO L125 PetriNetUnfolderBase]: For 335737/335743 co-relation queries the response was YES. [2024-06-21 17:38:19,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31741 conditions, 4656 events. 2823/4656 cut-off events. For 335737/335743 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28782 event pairs, 566 based on Foata normal form. 8/4662 useless extension candidates. Maximal degree in co-relation 31600. Up to 4161 conditions per place. [2024-06-21 17:38:19,884 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 91 changer transitions 0/451 dead transitions. [2024-06-21 17:38:19,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 451 transitions, 5904 flow [2024-06-21 17:38:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:38:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:38:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-06-21 17:38:19,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38605442176870747 [2024-06-21 17:38:19,886 INFO L175 Difference]: Start difference. First operand has 321 places, 391 transitions, 4384 flow. Second operand 14 states and 227 transitions. [2024-06-21 17:38:19,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 451 transitions, 5904 flow [2024-06-21 17:38:20,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 451 transitions, 5719 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 17:38:20,725 INFO L231 Difference]: Finished difference. Result has 328 places, 403 transitions, 4589 flow [2024-06-21 17:38:20,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4589, PETRI_PLACES=328, PETRI_TRANSITIONS=403} [2024-06-21 17:38:20,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 17:38:20,726 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 403 transitions, 4589 flow [2024-06-21 17:38:20,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:20,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:20,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:20,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:38:20,726 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:20,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1181967907, now seen corresponding path program 3 times [2024-06-21 17:38:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528572748] [2024-06-21 17:38:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:23,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:23,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528572748] [2024-06-21 17:38:23,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528572748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:23,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:23,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815349332] [2024-06-21 17:38:23,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:23,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:23,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 403 transitions, 4589 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:23,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:23,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:25,806 INFO L124 PetriNetUnfolderBase]: 2828/4665 cut-off events. [2024-06-21 17:38:25,806 INFO L125 PetriNetUnfolderBase]: For 340226/340232 co-relation queries the response was YES. [2024-06-21 17:38:25,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31983 conditions, 4665 events. 2828/4665 cut-off events. For 340226/340232 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28846 event pairs, 583 based on Foata normal form. 7/4670 useless extension candidates. Maximal degree in co-relation 31841. Up to 4250 conditions per place. [2024-06-21 17:38:25,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 74 changer transitions 0/443 dead transitions. [2024-06-21 17:38:25,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 443 transitions, 5619 flow [2024-06-21 17:38:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:38:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:38:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 17:38:25,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-21 17:38:25,864 INFO L175 Difference]: Start difference. First operand has 328 places, 403 transitions, 4589 flow. Second operand 12 states and 191 transitions. [2024-06-21 17:38:25,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 443 transitions, 5619 flow [2024-06-21 17:38:26,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 443 transitions, 5395 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-21 17:38:26,817 INFO L231 Difference]: Finished difference. Result has 329 places, 406 transitions, 4574 flow [2024-06-21 17:38:26,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4574, PETRI_PLACES=329, PETRI_TRANSITIONS=406} [2024-06-21 17:38:26,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:38:26,817 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 406 transitions, 4574 flow [2024-06-21 17:38:26,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:26,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:26,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:26,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:38:26,818 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:26,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash -17985877, now seen corresponding path program 3 times [2024-06-21 17:38:26,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:26,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635539663] [2024-06-21 17:38:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:26,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:30,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635539663] [2024-06-21 17:38:30,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635539663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:30,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:30,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030118923] [2024-06-21 17:38:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:30,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:30,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 406 transitions, 4574 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:30,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:30,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:30,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:32,627 INFO L124 PetriNetUnfolderBase]: 2822/4657 cut-off events. [2024-06-21 17:38:32,627 INFO L125 PetriNetUnfolderBase]: For 344382/344388 co-relation queries the response was YES. [2024-06-21 17:38:32,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31717 conditions, 4657 events. 2822/4657 cut-off events. For 344382/344388 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28855 event pairs, 566 based on Foata normal form. 8/4663 useless extension candidates. Maximal degree in co-relation 31574. Up to 4163 conditions per place. [2024-06-21 17:38:32,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 354 selfloop transitions, 93 changer transitions 0/452 dead transitions. [2024-06-21 17:38:32,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 452 transitions, 5754 flow [2024-06-21 17:38:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:38:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:38:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 223 transitions. [2024-06-21 17:38:32,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2024-06-21 17:38:32,691 INFO L175 Difference]: Start difference. First operand has 329 places, 406 transitions, 4574 flow. Second operand 14 states and 223 transitions. [2024-06-21 17:38:32,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 452 transitions, 5754 flow [2024-06-21 17:38:33,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 452 transitions, 5536 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-21 17:38:33,721 INFO L231 Difference]: Finished difference. Result has 333 places, 406 transitions, 4548 flow [2024-06-21 17:38:33,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4548, PETRI_PLACES=333, PETRI_TRANSITIONS=406} [2024-06-21 17:38:33,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:38:33,722 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 406 transitions, 4548 flow [2024-06-21 17:38:33,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:33,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:33,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:38:33,723 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:33,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash -514128313, now seen corresponding path program 3 times [2024-06-21 17:38:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:33,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606970540] [2024-06-21 17:38:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:33,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:36,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606970540] [2024-06-21 17:38:36,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606970540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:36,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:36,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446906191] [2024-06-21 17:38:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:36,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:36,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 406 transitions, 4548 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:36,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:36,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:36,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:38,588 INFO L124 PetriNetUnfolderBase]: 2858/4708 cut-off events. [2024-06-21 17:38:38,588 INFO L125 PetriNetUnfolderBase]: For 373472/373474 co-relation queries the response was YES. [2024-06-21 17:38:38,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32165 conditions, 4708 events. 2858/4708 cut-off events. For 373472/373474 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29105 event pairs, 571 based on Foata normal form. 8/4714 useless extension candidates. Maximal degree in co-relation 32022. Up to 4230 conditions per place. [2024-06-21 17:38:38,642 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 61 changer transitions 0/445 dead transitions. [2024-06-21 17:38:38,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 5607 flow [2024-06-21 17:38:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:38:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:38:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-21 17:38:38,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-21 17:38:38,644 INFO L175 Difference]: Start difference. First operand has 333 places, 406 transitions, 4548 flow. Second operand 12 states and 190 transitions. [2024-06-21 17:38:38,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 5607 flow [2024-06-21 17:38:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 445 transitions, 5400 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 17:38:39,634 INFO L231 Difference]: Finished difference. Result has 333 places, 409 transitions, 4527 flow [2024-06-21 17:38:39,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4527, PETRI_PLACES=333, PETRI_TRANSITIONS=409} [2024-06-21 17:38:39,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:38:39,635 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 409 transitions, 4527 flow [2024-06-21 17:38:39,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:39,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:39,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:38:39,636 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:39,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1710439017, now seen corresponding path program 4 times [2024-06-21 17:38:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85978477] [2024-06-21 17:38:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85978477] [2024-06-21 17:38:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85978477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:43,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163488513] [2024-06-21 17:38:43,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:43,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:43,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 409 transitions, 4527 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:43,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:43,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:43,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:45,113 INFO L124 PetriNetUnfolderBase]: 2879/4741 cut-off events. [2024-06-21 17:38:45,114 INFO L125 PetriNetUnfolderBase]: For 366413/366415 co-relation queries the response was YES. [2024-06-21 17:38:45,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32702 conditions, 4741 events. 2879/4741 cut-off events. For 366413/366415 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29357 event pairs, 614 based on Foata normal form. 1/4739 useless extension candidates. Maximal degree in co-relation 32557. Up to 4007 conditions per place. [2024-06-21 17:38:45,175 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 290 selfloop transitions, 162 changer transitions 0/457 dead transitions. [2024-06-21 17:38:45,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 457 transitions, 6299 flow [2024-06-21 17:38:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:38:45,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 17:38:45,177 INFO L175 Difference]: Start difference. First operand has 333 places, 409 transitions, 4527 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:38:45,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 457 transitions, 6299 flow [2024-06-21 17:38:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 457 transitions, 6166 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:46,219 INFO L231 Difference]: Finished difference. Result has 335 places, 421 transitions, 5002 flow [2024-06-21 17:38:46,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5002, PETRI_PLACES=335, PETRI_TRANSITIONS=421} [2024-06-21 17:38:46,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 17:38:46,220 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 421 transitions, 5002 flow [2024-06-21 17:38:46,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:46,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:46,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:46,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:38:46,221 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:46,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash 669865281, now seen corresponding path program 1 times [2024-06-21 17:38:46,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:46,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355803217] [2024-06-21 17:38:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:49,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:49,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355803217] [2024-06-21 17:38:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355803217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:49,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:49,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116707275] [2024-06-21 17:38:49,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:49,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:49,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:49,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 421 transitions, 5002 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:49,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:49,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:49,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:51,742 INFO L124 PetriNetUnfolderBase]: 2921/4800 cut-off events. [2024-06-21 17:38:51,743 INFO L125 PetriNetUnfolderBase]: For 395605/395611 co-relation queries the response was YES. [2024-06-21 17:38:51,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34114 conditions, 4800 events. 2921/4800 cut-off events. For 395605/395611 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 29678 event pairs, 603 based on Foata normal form. 8/4805 useless extension candidates. Maximal degree in co-relation 33968. Up to 4210 conditions per place. [2024-06-21 17:38:51,806 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 131 changer transitions 0/470 dead transitions. [2024-06-21 17:38:51,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 470 transitions, 6540 flow [2024-06-21 17:38:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:38:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:38:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-21 17:38:51,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-21 17:38:51,808 INFO L175 Difference]: Start difference. First operand has 335 places, 421 transitions, 5002 flow. Second operand 12 states and 199 transitions. [2024-06-21 17:38:51,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 470 transitions, 6540 flow [2024-06-21 17:38:53,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 470 transitions, 6348 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:53,027 INFO L231 Difference]: Finished difference. Result has 344 places, 430 transitions, 5246 flow [2024-06-21 17:38:53,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5246, PETRI_PLACES=344, PETRI_TRANSITIONS=430} [2024-06-21 17:38:53,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 17:38:53,028 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 430 transitions, 5246 flow [2024-06-21 17:38:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:53,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:53,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:38:53,029 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:53,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 664203999, now seen corresponding path program 5 times [2024-06-21 17:38:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366470912] [2024-06-21 17:38:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:56,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366470912] [2024-06-21 17:38:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366470912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:56,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:56,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:38:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149462138] [2024-06-21 17:38:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:38:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:38:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:38:56,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:38:56,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 430 transitions, 5246 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:56,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:56,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:38:56,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:58,530 INFO L124 PetriNetUnfolderBase]: 2926/4808 cut-off events. [2024-06-21 17:38:58,530 INFO L125 PetriNetUnfolderBase]: For 402889/402891 co-relation queries the response was YES. [2024-06-21 17:38:58,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34810 conditions, 4808 events. 2926/4808 cut-off events. For 402889/402891 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29768 event pairs, 617 based on Foata normal form. 1/4806 useless extension candidates. Maximal degree in co-relation 34662. Up to 4071 conditions per place. [2024-06-21 17:38:58,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 157 changer transitions 0/470 dead transitions. [2024-06-21 17:38:58,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 470 transitions, 7010 flow [2024-06-21 17:38:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:38:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:38:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:38:58,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:38:58,591 INFO L175 Difference]: Start difference. First operand has 344 places, 430 transitions, 5246 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:38:58,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 470 transitions, 7010 flow [2024-06-21 17:38:59,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 470 transitions, 6771 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 17:38:59,733 INFO L231 Difference]: Finished difference. Result has 346 places, 433 transitions, 5381 flow [2024-06-21 17:38:59,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5007, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5381, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2024-06-21 17:38:59,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 17:38:59,734 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 5381 flow [2024-06-21 17:38:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:59,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:59,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:38:59,735 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:59,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2080040453, now seen corresponding path program 6 times [2024-06-21 17:38:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931987164] [2024-06-21 17:38:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:03,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931987164] [2024-06-21 17:39:03,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931987164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:03,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:03,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726257347] [2024-06-21 17:39:03,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:03,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:03,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:03,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 5381 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:03,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:03,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:03,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:05,235 INFO L124 PetriNetUnfolderBase]: 2936/4827 cut-off events. [2024-06-21 17:39:05,236 INFO L125 PetriNetUnfolderBase]: For 411818/411822 co-relation queries the response was YES. [2024-06-21 17:39:05,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35196 conditions, 4827 events. 2936/4827 cut-off events. For 411818/411822 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29985 event pairs, 609 based on Foata normal form. 3/4828 useless extension candidates. Maximal degree in co-relation 35046. Up to 4307 conditions per place. [2024-06-21 17:39:05,293 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 361 selfloop transitions, 102 changer transitions 0/468 dead transitions. [2024-06-21 17:39:05,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 468 transitions, 6477 flow [2024-06-21 17:39:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:39:05,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 17:39:05,295 INFO L175 Difference]: Start difference. First operand has 346 places, 433 transitions, 5381 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:39:05,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 468 transitions, 6477 flow [2024-06-21 17:39:06,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 468 transitions, 6047 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 17:39:06,432 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5257 flow [2024-06-21 17:39:06,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5257, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-21 17:39:06,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 17:39:06,432 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5257 flow [2024-06-21 17:39:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:06,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:06,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:06,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:39:06,433 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:06,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2074499513, now seen corresponding path program 7 times [2024-06-21 17:39:06,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:06,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353378139] [2024-06-21 17:39:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:09,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:09,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353378139] [2024-06-21 17:39:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353378139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:09,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270756825] [2024-06-21 17:39:09,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:09,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:09,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:10,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:10,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5257 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:10,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:10,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:10,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:12,210 INFO L124 PetriNetUnfolderBase]: 2941/4839 cut-off events. [2024-06-21 17:39:12,210 INFO L125 PetriNetUnfolderBase]: For 419323/419325 co-relation queries the response was YES. [2024-06-21 17:39:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35079 conditions, 4839 events. 2941/4839 cut-off events. For 419323/419325 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30058 event pairs, 619 based on Foata normal form. 1/4837 useless extension candidates. Maximal degree in co-relation 34928. Up to 4087 conditions per place. [2024-06-21 17:39:12,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 173 changer transitions 0/473 dead transitions. [2024-06-21 17:39:12,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 473 transitions, 6667 flow [2024-06-21 17:39:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:39:12,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 17:39:12,267 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5257 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:39:12,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 473 transitions, 6667 flow [2024-06-21 17:39:13,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 473 transitions, 6435 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:13,457 INFO L231 Difference]: Finished difference. Result has 351 places, 442 transitions, 5419 flow [2024-06-21 17:39:13,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5419, PETRI_PLACES=351, PETRI_TRANSITIONS=442} [2024-06-21 17:39:13,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 17:39:13,458 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 442 transitions, 5419 flow [2024-06-21 17:39:13,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:13,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:13,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:39:13,459 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:13,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 664324155, now seen corresponding path program 4 times [2024-06-21 17:39:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181238706] [2024-06-21 17:39:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181238706] [2024-06-21 17:39:16,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181238706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:16,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:16,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590242828] [2024-06-21 17:39:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:16,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:16,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 442 transitions, 5419 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:16,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:16,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:16,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:18,406 INFO L124 PetriNetUnfolderBase]: 2983/4902 cut-off events. [2024-06-21 17:39:18,407 INFO L125 PetriNetUnfolderBase]: For 449916/449920 co-relation queries the response was YES. [2024-06-21 17:39:18,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36267 conditions, 4902 events. 2983/4902 cut-off events. For 449916/449920 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 30494 event pairs, 597 based on Foata normal form. 4/4904 useless extension candidates. Maximal degree in co-relation 36115. Up to 4178 conditions per place. [2024-06-21 17:39:18,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 154 changer transitions 0/490 dead transitions. [2024-06-21 17:39:18,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 490 transitions, 7221 flow [2024-06-21 17:39:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:39:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:39:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-21 17:39:18,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 17:39:18,474 INFO L175 Difference]: Start difference. First operand has 351 places, 442 transitions, 5419 flow. Second operand 12 states and 201 transitions. [2024-06-21 17:39:18,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 490 transitions, 7221 flow [2024-06-21 17:39:19,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 490 transitions, 6973 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:19,718 INFO L231 Difference]: Finished difference. Result has 358 places, 451 transitions, 5695 flow [2024-06-21 17:39:19,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5171, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5695, PETRI_PLACES=358, PETRI_TRANSITIONS=451} [2024-06-21 17:39:19,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 17:39:19,719 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 451 transitions, 5695 flow [2024-06-21 17:39:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:19,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:19,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:19,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:39:19,720 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:19,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2070780443, now seen corresponding path program 8 times [2024-06-21 17:39:19,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:19,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853634243] [2024-06-21 17:39:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:23,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853634243] [2024-06-21 17:39:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853634243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:23,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:23,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079794404] [2024-06-21 17:39:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:23,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:23,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:23,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:23,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:23,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 451 transitions, 5695 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:23,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:23,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:23,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:25,208 INFO L124 PetriNetUnfolderBase]: 3001/4937 cut-off events. [2024-06-21 17:39:25,208 INFO L125 PetriNetUnfolderBase]: For 463515/463519 co-relation queries the response was YES. [2024-06-21 17:39:25,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37026 conditions, 4937 events. 3001/4937 cut-off events. For 463515/463519 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30821 event pairs, 617 based on Foata normal form. 3/4938 useless extension candidates. Maximal degree in co-relation 36873. Up to 4381 conditions per place. [2024-06-21 17:39:25,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 115 changer transitions 0/486 dead transitions. [2024-06-21 17:39:25,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 486 transitions, 7032 flow [2024-06-21 17:39:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:39:25,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:39:25,270 INFO L175 Difference]: Start difference. First operand has 358 places, 451 transitions, 5695 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:39:25,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 486 transitions, 7032 flow [2024-06-21 17:39:26,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 486 transitions, 6777 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:26,604 INFO L231 Difference]: Finished difference. Result has 362 places, 460 transitions, 5832 flow [2024-06-21 17:39:26,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5832, PETRI_PLACES=362, PETRI_TRANSITIONS=460} [2024-06-21 17:39:26,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 17:39:26,604 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 460 transitions, 5832 flow [2024-06-21 17:39:26,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:26,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:26,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:39:26,605 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:26,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1706415465, now seen corresponding path program 2 times [2024-06-21 17:39:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556662865] [2024-06-21 17:39:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:29,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556662865] [2024-06-21 17:39:29,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556662865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:29,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:29,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:29,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669315741] [2024-06-21 17:39:29,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:29,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:29,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:29,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:29,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 460 transitions, 5832 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:29,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:29,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:29,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:31,807 INFO L124 PetriNetUnfolderBase]: 3027/4974 cut-off events. [2024-06-21 17:39:31,807 INFO L125 PetriNetUnfolderBase]: For 483685/483693 co-relation queries the response was YES. [2024-06-21 17:39:31,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37494 conditions, 4974 events. 3027/4974 cut-off events. For 483685/483693 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30973 event pairs, 600 based on Foata normal form. 10/4982 useless extension candidates. Maximal degree in co-relation 37338. Up to 4500 conditions per place. [2024-06-21 17:39:31,866 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 88 changer transitions 0/503 dead transitions. [2024-06-21 17:39:31,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 503 transitions, 7164 flow [2024-06-21 17:39:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:39:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:39:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-21 17:39:31,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-21 17:39:31,868 INFO L175 Difference]: Start difference. First operand has 362 places, 460 transitions, 5832 flow. Second operand 13 states and 203 transitions. [2024-06-21 17:39:31,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 503 transitions, 7164 flow [2024-06-21 17:39:33,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 503 transitions, 6971 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:33,339 INFO L231 Difference]: Finished difference. Result has 371 places, 466 transitions, 5883 flow [2024-06-21 17:39:33,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5883, PETRI_PLACES=371, PETRI_TRANSITIONS=466} [2024-06-21 17:39:33,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 17:39:33,340 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 466 transitions, 5883 flow [2024-06-21 17:39:33,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:33,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:33,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:33,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:39:33,341 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:33,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2070774677, now seen corresponding path program 5 times [2024-06-21 17:39:33,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:33,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501912090] [2024-06-21 17:39:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:33,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:36,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:36,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501912090] [2024-06-21 17:39:36,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501912090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:36,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:36,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:36,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661907051] [2024-06-21 17:39:36,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:36,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:36,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:36,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:36,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:36,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 466 transitions, 5883 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:36,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:36,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:36,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:38,629 INFO L124 PetriNetUnfolderBase]: 3053/5011 cut-off events. [2024-06-21 17:39:38,629 INFO L125 PetriNetUnfolderBase]: For 497935/497939 co-relation queries the response was YES. [2024-06-21 17:39:38,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37595 conditions, 5011 events. 3053/5011 cut-off events. For 497935/497939 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31258 event pairs, 599 based on Foata normal form. 4/5013 useless extension candidates. Maximal degree in co-relation 37438. Up to 4261 conditions per place. [2024-06-21 17:39:38,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 157 changer transitions 0/506 dead transitions. [2024-06-21 17:39:38,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 506 transitions, 7593 flow [2024-06-21 17:39:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:39:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:39:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 17:39:38,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 17:39:38,693 INFO L175 Difference]: Start difference. First operand has 371 places, 466 transitions, 5883 flow. Second operand 11 states and 186 transitions. [2024-06-21 17:39:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 506 transitions, 7593 flow [2024-06-21 17:39:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 506 transitions, 7471 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 17:39:40,120 INFO L231 Difference]: Finished difference. Result has 373 places, 472 transitions, 6157 flow [2024-06-21 17:39:40,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6157, PETRI_PLACES=373, PETRI_TRANSITIONS=472} [2024-06-21 17:39:40,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 17:39:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 472 transitions, 6157 flow [2024-06-21 17:39:40,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:40,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:40,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:40,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:39:40,121 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:40,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2070780071, now seen corresponding path program 3 times [2024-06-21 17:39:40,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:40,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374332649] [2024-06-21 17:39:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:40,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374332649] [2024-06-21 17:39:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374332649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:43,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848379283] [2024-06-21 17:39:43,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:43,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:43,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:43,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 472 transitions, 6157 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:43,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:43,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:45,766 INFO L124 PetriNetUnfolderBase]: 3047/5004 cut-off events. [2024-06-21 17:39:45,766 INFO L125 PetriNetUnfolderBase]: For 500622/500630 co-relation queries the response was YES. [2024-06-21 17:39:45,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37893 conditions, 5004 events. 3047/5004 cut-off events. For 500622/500630 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31243 event pairs, 600 based on Foata normal form. 10/5012 useless extension candidates. Maximal degree in co-relation 37734. Up to 4531 conditions per place. [2024-06-21 17:39:45,837 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 88 changer transitions 0/507 dead transitions. [2024-06-21 17:39:45,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 507 transitions, 7257 flow [2024-06-21 17:39:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:39:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:39:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 17:39:45,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-21 17:39:45,839 INFO L175 Difference]: Start difference. First operand has 373 places, 472 transitions, 6157 flow. Second operand 12 states and 191 transitions. [2024-06-21 17:39:45,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 507 transitions, 7257 flow [2024-06-21 17:39:47,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 507 transitions, 6954 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:39:47,600 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 6036 flow [2024-06-21 17:39:47,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6036, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-21 17:39:47,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 17:39:47,601 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 6036 flow [2024-06-21 17:39:47,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:47,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:47,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:39:47,601 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:47,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1706426997, now seen corresponding path program 9 times [2024-06-21 17:39:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337639698] [2024-06-21 17:39:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:47,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:51,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:51,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337639698] [2024-06-21 17:39:51,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337639698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:51,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:51,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:51,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853481280] [2024-06-21 17:39:51,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:51,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:51,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:51,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 6036 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:51,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:51,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:51,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:53,328 INFO L124 PetriNetUnfolderBase]: 3044/5005 cut-off events. [2024-06-21 17:39:53,329 INFO L125 PetriNetUnfolderBase]: For 500706/500710 co-relation queries the response was YES. [2024-06-21 17:39:53,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37641 conditions, 5005 events. 3044/5005 cut-off events. For 500706/500710 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31236 event pairs, 622 based on Foata normal form. 3/5006 useless extension candidates. Maximal degree in co-relation 37481. Up to 4442 conditions per place. [2024-06-21 17:39:53,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 116 changer transitions 0/499 dead transitions. [2024-06-21 17:39:53,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 499 transitions, 7096 flow [2024-06-21 17:39:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:39:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:39:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 17:39:53,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:39:53,400 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 6036 flow. Second operand 11 states and 176 transitions. [2024-06-21 17:39:53,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 499 transitions, 7096 flow [2024-06-21 17:39:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 499 transitions, 6894 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 17:39:55,069 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 6072 flow [2024-06-21 17:39:55,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5834, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6072, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-21 17:39:55,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 17:39:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 6072 flow [2024-06-21 17:39:55,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:55,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:55,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:39:55,070 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:39:55,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash 673578585, now seen corresponding path program 6 times [2024-06-21 17:39:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421418243] [2024-06-21 17:39:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:58,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:58,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421418243] [2024-06-21 17:39:58,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421418243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:58,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:58,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414282745] [2024-06-21 17:39:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:39:58,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 6072 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:58,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:58,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:39:58,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:00,517 INFO L124 PetriNetUnfolderBase]: 3038/4993 cut-off events. [2024-06-21 17:40:00,517 INFO L125 PetriNetUnfolderBase]: For 506810/506814 co-relation queries the response was YES. [2024-06-21 17:40:00,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37543 conditions, 4993 events. 3038/4993 cut-off events. For 506810/506814 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31194 event pairs, 597 based on Foata normal form. 4/4995 useless extension candidates. Maximal degree in co-relation 37382. Up to 4244 conditions per place. [2024-06-21 17:40:00,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 158 changer transitions 0/508 dead transitions. [2024-06-21 17:40:00,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 508 transitions, 7544 flow [2024-06-21 17:40:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:40:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:40:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-21 17:40:00,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 17:40:00,589 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 6072 flow. Second operand 13 states and 210 transitions. [2024-06-21 17:40:00,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 508 transitions, 7544 flow [2024-06-21 17:40:02,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 508 transitions, 7254 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 17:40:02,513 INFO L231 Difference]: Finished difference. Result has 381 places, 472 transitions, 6104 flow [2024-06-21 17:40:02,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6104, PETRI_PLACES=381, PETRI_TRANSITIONS=472} [2024-06-21 17:40:02,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 17:40:02,514 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 472 transitions, 6104 flow [2024-06-21 17:40:02,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:02,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:02,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:40:02,515 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:02,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -502954177, now seen corresponding path program 7 times [2024-06-21 17:40:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:02,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450476280] [2024-06-21 17:40:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:05,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:05,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450476280] [2024-06-21 17:40:05,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450476280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:05,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:05,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693424795] [2024-06-21 17:40:05,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:05,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:05,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:05,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:05,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 472 transitions, 6104 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:05,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:07,635 INFO L124 PetriNetUnfolderBase]: 3127/5133 cut-off events. [2024-06-21 17:40:07,635 INFO L125 PetriNetUnfolderBase]: For 554928/554932 co-relation queries the response was YES. [2024-06-21 17:40:07,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39456 conditions, 5133 events. 3127/5133 cut-off events. For 554928/554932 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 32201 event pairs, 614 based on Foata normal form. 4/5135 useless extension candidates. Maximal degree in co-relation 39294. Up to 4326 conditions per place. [2024-06-21 17:40:07,700 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 169 changer transitions 0/525 dead transitions. [2024-06-21 17:40:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 525 transitions, 8172 flow [2024-06-21 17:40:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:40:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:40:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:40:07,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:40:07,702 INFO L175 Difference]: Start difference. First operand has 381 places, 472 transitions, 6104 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:40:07,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 525 transitions, 8172 flow [2024-06-21 17:40:09,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 525 transitions, 7795 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 17:40:09,498 INFO L231 Difference]: Finished difference. Result has 379 places, 496 transitions, 6457 flow [2024-06-21 17:40:09,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6457, PETRI_PLACES=379, PETRI_TRANSITIONS=496} [2024-06-21 17:40:09,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 17:40:09,499 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 496 transitions, 6457 flow [2024-06-21 17:40:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:09,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:09,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:09,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:40:09,499 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:09,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1869699569, now seen corresponding path program 8 times [2024-06-21 17:40:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:09,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618892326] [2024-06-21 17:40:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618892326] [2024-06-21 17:40:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618892326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:12,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:12,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107437095] [2024-06-21 17:40:12,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:12,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:12,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 496 transitions, 6457 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:12,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:14,689 INFO L124 PetriNetUnfolderBase]: 3137/5143 cut-off events. [2024-06-21 17:40:14,689 INFO L125 PetriNetUnfolderBase]: For 565683/565687 co-relation queries the response was YES. [2024-06-21 17:40:14,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39619 conditions, 5143 events. 3137/5143 cut-off events. For 565683/565687 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32201 event pairs, 610 based on Foata normal form. 4/5145 useless extension candidates. Maximal degree in co-relation 39456. Up to 4336 conditions per place. [2024-06-21 17:40:14,760 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 179 changer transitions 0/532 dead transitions. [2024-06-21 17:40:14,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 532 transitions, 8406 flow [2024-06-21 17:40:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:40:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:40:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-21 17:40:14,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:40:14,780 INFO L175 Difference]: Start difference. First operand has 379 places, 496 transitions, 6457 flow. Second operand 12 states and 198 transitions. [2024-06-21 17:40:14,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 532 transitions, 8406 flow [2024-06-21 17:40:16,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 532 transitions, 8223 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:40:16,968 INFO L231 Difference]: Finished difference. Result has 388 places, 499 transitions, 6685 flow [2024-06-21 17:40:16,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6685, PETRI_PLACES=388, PETRI_TRANSITIONS=499} [2024-06-21 17:40:16,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 17:40:16,969 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 499 transitions, 6685 flow [2024-06-21 17:40:16,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:16,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:16,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:16,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:40:16,970 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:16,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1869688223, now seen corresponding path program 10 times [2024-06-21 17:40:16,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:16,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378170195] [2024-06-21 17:40:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:20,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378170195] [2024-06-21 17:40:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378170195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:20,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76982952] [2024-06-21 17:40:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:20,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:20,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 499 transitions, 6685 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:20,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:20,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:22,240 INFO L124 PetriNetUnfolderBase]: 3166/5195 cut-off events. [2024-06-21 17:40:22,241 INFO L125 PetriNetUnfolderBase]: For 588545/588549 co-relation queries the response was YES. [2024-06-21 17:40:22,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40473 conditions, 5195 events. 3166/5195 cut-off events. For 588545/588549 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32628 event pairs, 631 based on Foata normal form. 3/5196 useless extension candidates. Maximal degree in co-relation 40309. Up to 4578 conditions per place. [2024-06-21 17:40:22,316 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 141 changer transitions 0/538 dead transitions. [2024-06-21 17:40:22,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 538 transitions, 8638 flow [2024-06-21 17:40:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:40:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:40:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 17:40:22,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 17:40:22,318 INFO L175 Difference]: Start difference. First operand has 388 places, 499 transitions, 6685 flow. Second operand 12 states and 188 transitions. [2024-06-21 17:40:22,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 538 transitions, 8638 flow [2024-06-21 17:40:24,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 538 transitions, 8270 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:40:24,415 INFO L231 Difference]: Finished difference. Result has 395 places, 511 transitions, 6910 flow [2024-06-21 17:40:24,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6317, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6910, PETRI_PLACES=395, PETRI_TRANSITIONS=511} [2024-06-21 17:40:24,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 17:40:24,416 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 511 transitions, 6910 flow [2024-06-21 17:40:24,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:24,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:24,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:24,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:40:24,417 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:24,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:24,417 INFO L85 PathProgramCache]: Analyzing trace with hash 817682271, now seen corresponding path program 4 times [2024-06-21 17:40:24,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:24,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345376574] [2024-06-21 17:40:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:24,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:27,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:27,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345376574] [2024-06-21 17:40:27,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345376574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:27,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:27,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:27,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655458905] [2024-06-21 17:40:27,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:27,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:27,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:27,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 511 transitions, 6910 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:27,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:27,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:27,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:29,834 INFO L124 PetriNetUnfolderBase]: 3208/5255 cut-off events. [2024-06-21 17:40:29,835 INFO L125 PetriNetUnfolderBase]: For 623160/623168 co-relation queries the response was YES. [2024-06-21 17:40:29,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41185 conditions, 5255 events. 3208/5255 cut-off events. For 623160/623168 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33055 event pairs, 604 based on Foata normal form. 10/5263 useless extension candidates. Maximal degree in co-relation 41017. Up to 4714 conditions per place. [2024-06-21 17:40:29,912 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 99 changer transitions 0/552 dead transitions. [2024-06-21 17:40:29,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 552 transitions, 8390 flow [2024-06-21 17:40:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:40:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:40:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 17:40:29,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 17:40:29,914 INFO L175 Difference]: Start difference. First operand has 395 places, 511 transitions, 6910 flow. Second operand 12 states and 188 transitions. [2024-06-21 17:40:29,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 552 transitions, 8390 flow [2024-06-21 17:40:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 552 transitions, 8090 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:32,102 INFO L231 Difference]: Finished difference. Result has 402 places, 520 transitions, 6948 flow [2024-06-21 17:40:32,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6948, PETRI_PLACES=402, PETRI_TRANSITIONS=520} [2024-06-21 17:40:32,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 17:40:32,103 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 520 transitions, 6948 flow [2024-06-21 17:40:32,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:32,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:32,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:32,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:40:32,104 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:32,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash -503074147, now seen corresponding path program 9 times [2024-06-21 17:40:32,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:32,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304207953] [2024-06-21 17:40:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:32,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:35,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:35,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304207953] [2024-06-21 17:40:35,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304207953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:35,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:35,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772847088] [2024-06-21 17:40:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:35,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:35,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 520 transitions, 6948 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:35,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:35,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:35,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:37,917 INFO L124 PetriNetUnfolderBase]: 3228/5287 cut-off events. [2024-06-21 17:40:37,917 INFO L125 PetriNetUnfolderBase]: For 634840/634842 co-relation queries the response was YES. [2024-06-21 17:40:37,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41488 conditions, 5287 events. 3228/5287 cut-off events. For 634840/634842 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33233 event pairs, 608 based on Foata normal form. 2/5287 useless extension candidates. Maximal degree in co-relation 41318. Up to 4813 conditions per place. [2024-06-21 17:40:37,985 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 486 selfloop transitions, 61 changer transitions 0/552 dead transitions. [2024-06-21 17:40:37,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 552 transitions, 8207 flow [2024-06-21 17:40:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:40:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:40:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 17:40:37,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 17:40:37,986 INFO L175 Difference]: Start difference. First operand has 402 places, 520 transitions, 6948 flow. Second operand 10 states and 161 transitions. [2024-06-21 17:40:37,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 552 transitions, 8207 flow [2024-06-21 17:40:40,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 552 transitions, 8065 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:40:40,098 INFO L231 Difference]: Finished difference. Result has 404 places, 526 transitions, 7039 flow [2024-06-21 17:40:40,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7039, PETRI_PLACES=404, PETRI_TRANSITIONS=526} [2024-06-21 17:40:40,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 17:40:40,099 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 526 transitions, 7039 flow [2024-06-21 17:40:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:40,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:40,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:40,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:40:40,100 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:40,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1866206489, now seen corresponding path program 10 times [2024-06-21 17:40:40,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:40,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750027595] [2024-06-21 17:40:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:40,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:43,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:43,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750027595] [2024-06-21 17:40:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750027595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:43,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502035766] [2024-06-21 17:40:43,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:43,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:43,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 526 transitions, 7039 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:43,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:43,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:43,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:46,002 INFO L124 PetriNetUnfolderBase]: 3222/5275 cut-off events. [2024-06-21 17:40:46,002 INFO L125 PetriNetUnfolderBase]: For 636846/636848 co-relation queries the response was YES. [2024-06-21 17:40:46,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41451 conditions, 5275 events. 3222/5275 cut-off events. For 636846/636848 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33168 event pairs, 605 based on Foata normal form. 2/5275 useless extension candidates. Maximal degree in co-relation 41279. Up to 4780 conditions per place. [2024-06-21 17:40:46,082 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 480 selfloop transitions, 75 changer transitions 0/560 dead transitions. [2024-06-21 17:40:46,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 560 transitions, 8431 flow [2024-06-21 17:40:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:40:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:40:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-21 17:40:46,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 17:40:46,084 INFO L175 Difference]: Start difference. First operand has 404 places, 526 transitions, 7039 flow. Second operand 14 states and 214 transitions. [2024-06-21 17:40:46,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 560 transitions, 8431 flow [2024-06-21 17:40:48,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 560 transitions, 8281 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:48,526 INFO L231 Difference]: Finished difference. Result has 412 places, 526 transitions, 7045 flow [2024-06-21 17:40:48,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7045, PETRI_PLACES=412, PETRI_TRANSITIONS=526} [2024-06-21 17:40:48,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 17:40:48,527 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 526 transitions, 7045 flow [2024-06-21 17:40:48,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:48,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:48,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:48,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:40:48,527 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:48,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash -874676013, now seen corresponding path program 11 times [2024-06-21 17:40:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:48,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284471529] [2024-06-21 17:40:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284471529] [2024-06-21 17:40:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284471529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:52,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:52,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116985127] [2024-06-21 17:40:52,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:52,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:40:52,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 526 transitions, 7045 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:52,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:52,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:40:52,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:54,318 INFO L124 PetriNetUnfolderBase]: 3216/5263 cut-off events. [2024-06-21 17:40:54,318 INFO L125 PetriNetUnfolderBase]: For 638958/638962 co-relation queries the response was YES. [2024-06-21 17:40:54,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41295 conditions, 5263 events. 3216/5263 cut-off events. For 638958/638962 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33029 event pairs, 611 based on Foata normal form. 4/5265 useless extension candidates. Maximal degree in co-relation 41122. Up to 4440 conditions per place. [2024-06-21 17:40:54,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 187 changer transitions 0/559 dead transitions. [2024-06-21 17:40:54,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 559 transitions, 8839 flow [2024-06-21 17:40:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:40:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:40:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-21 17:40:54,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:40:54,398 INFO L175 Difference]: Start difference. First operand has 412 places, 526 transitions, 7045 flow. Second operand 13 states and 208 transitions. [2024-06-21 17:40:54,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 559 transitions, 8839 flow [2024-06-21 17:40:57,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 559 transitions, 8668 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 17:40:57,035 INFO L231 Difference]: Finished difference. Result has 413 places, 526 transitions, 7254 flow [2024-06-21 17:40:57,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7254, PETRI_PLACES=413, PETRI_TRANSITIONS=526} [2024-06-21 17:40:57,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 17:40:57,036 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 526 transitions, 7254 flow [2024-06-21 17:40:57,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:57,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:57,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:57,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:40:57,036 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:40:57,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:57,037 INFO L85 PathProgramCache]: Analyzing trace with hash -878395269, now seen corresponding path program 11 times [2024-06-21 17:40:57,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:57,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849452586] [2024-06-21 17:40:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:00,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849452586] [2024-06-21 17:41:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849452586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:00,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:00,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018493932] [2024-06-21 17:41:00,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:00,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:00,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:00,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:00,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:00,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:00,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 526 transitions, 7254 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:00,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:00,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:00,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:02,436 INFO L124 PetriNetUnfolderBase]: 3213/5263 cut-off events. [2024-06-21 17:41:02,436 INFO L125 PetriNetUnfolderBase]: For 640271/640273 co-relation queries the response was YES. [2024-06-21 17:41:02,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41595 conditions, 5263 events. 3213/5263 cut-off events. For 640271/640273 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33091 event pairs, 622 based on Foata normal form. 1/5262 useless extension candidates. Maximal degree in co-relation 41421. Up to 4840 conditions per place. [2024-06-21 17:41:02,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 490 selfloop transitions, 52 changer transitions 0/547 dead transitions. [2024-06-21 17:41:02,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 547 transitions, 8394 flow [2024-06-21 17:41:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 17:41:02,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 17:41:02,519 INFO L175 Difference]: Start difference. First operand has 413 places, 526 transitions, 7254 flow. Second operand 9 states and 143 transitions. [2024-06-21 17:41:02,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 547 transitions, 8394 flow [2024-06-21 17:41:04,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 547 transitions, 7976 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-21 17:41:04,698 INFO L231 Difference]: Finished difference. Result has 411 places, 526 transitions, 6947 flow [2024-06-21 17:41:04,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6836, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6947, PETRI_PLACES=411, PETRI_TRANSITIONS=526} [2024-06-21 17:41:04,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-21 17:41:04,699 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 526 transitions, 6947 flow [2024-06-21 17:41:04,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:04,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:04,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:04,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:41:04,700 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:04,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash -510305641, now seen corresponding path program 5 times [2024-06-21 17:41:04,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:04,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393593220] [2024-06-21 17:41:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:07,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393593220] [2024-06-21 17:41:07,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393593220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:07,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874428282] [2024-06-21 17:41:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:07,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:07,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 526 transitions, 6947 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:07,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:07,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:07,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:10,230 INFO L124 PetriNetUnfolderBase]: 3223/5273 cut-off events. [2024-06-21 17:41:10,231 INFO L125 PetriNetUnfolderBase]: For 656662/656670 co-relation queries the response was YES. [2024-06-21 17:41:10,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41313 conditions, 5273 events. 3223/5273 cut-off events. For 656662/656670 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33118 event pairs, 605 based on Foata normal form. 10/5281 useless extension candidates. Maximal degree in co-relation 41138. Up to 4732 conditions per place. [2024-06-21 17:41:10,303 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 102 changer transitions 0/568 dead transitions. [2024-06-21 17:41:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 568 transitions, 8628 flow [2024-06-21 17:41:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 17:41:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 17:41:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 230 transitions. [2024-06-21 17:41:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 17:41:10,305 INFO L175 Difference]: Start difference. First operand has 411 places, 526 transitions, 6947 flow. Second operand 15 states and 230 transitions. [2024-06-21 17:41:10,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 568 transitions, 8628 flow [2024-06-21 17:41:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 568 transitions, 8483 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:13,089 INFO L231 Difference]: Finished difference. Result has 417 places, 529 transitions, 7055 flow [2024-06-21 17:41:13,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6802, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7055, PETRI_PLACES=417, PETRI_TRANSITIONS=529} [2024-06-21 17:41:13,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 17:41:13,090 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 529 transitions, 7055 flow [2024-06-21 17:41:13,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:13,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:13,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:41:13,090 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:13,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -510311221, now seen corresponding path program 6 times [2024-06-21 17:41:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:13,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138366436] [2024-06-21 17:41:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:16,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:16,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138366436] [2024-06-21 17:41:16,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138366436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:16,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:16,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:16,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575544165] [2024-06-21 17:41:16,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:16,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:16,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:16,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:16,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 529 transitions, 7055 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:16,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:16,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:16,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:19,081 INFO L124 PetriNetUnfolderBase]: 3217/5267 cut-off events. [2024-06-21 17:41:19,081 INFO L125 PetriNetUnfolderBase]: For 657831/657839 co-relation queries the response was YES. [2024-06-21 17:41:19,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41309 conditions, 5267 events. 3217/5267 cut-off events. For 657831/657839 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33146 event pairs, 606 based on Foata normal form. 10/5275 useless extension candidates. Maximal degree in co-relation 41133. Up to 4727 conditions per place. [2024-06-21 17:41:19,164 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 102 changer transitions 0/563 dead transitions. [2024-06-21 17:41:19,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 563 transitions, 8469 flow [2024-06-21 17:41:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:41:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:41:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-21 17:41:19,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-21 17:41:19,166 INFO L175 Difference]: Start difference. First operand has 417 places, 529 transitions, 7055 flow. Second operand 13 states and 203 transitions. [2024-06-21 17:41:19,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 563 transitions, 8469 flow [2024-06-21 17:41:22,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 563 transitions, 8184 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-21 17:41:22,099 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 6980 flow [2024-06-21 17:41:22,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6980, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-21 17:41:22,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 17:41:22,100 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 6980 flow [2024-06-21 17:41:22,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:22,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:22,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:22,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:41:22,102 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:22,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -514036057, now seen corresponding path program 12 times [2024-06-21 17:41:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:22,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15578353] [2024-06-21 17:41:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:22,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:25,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15578353] [2024-06-21 17:41:25,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15578353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:25,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:25,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350794329] [2024-06-21 17:41:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:25,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:25,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 6980 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:25,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:25,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:25,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:27,805 INFO L124 PetriNetUnfolderBase]: 3211/5265 cut-off events. [2024-06-21 17:41:27,805 INFO L125 PetriNetUnfolderBase]: For 658456/658458 co-relation queries the response was YES. [2024-06-21 17:41:27,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40921 conditions, 5265 events. 3211/5265 cut-off events. For 658456/658458 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33168 event pairs, 604 based on Foata normal form. 2/5265 useless extension candidates. Maximal degree in co-relation 40745. Up to 4769 conditions per place. [2024-06-21 17:41:27,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 75 changer transitions 0/558 dead transitions. [2024-06-21 17:41:27,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 558 transitions, 8158 flow [2024-06-21 17:41:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:41:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:41:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-21 17:41:27,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-21 17:41:27,882 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 6980 flow. Second operand 12 states and 187 transitions. [2024-06-21 17:41:27,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 558 transitions, 8158 flow [2024-06-21 17:41:30,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 558 transitions, 7928 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 17:41:30,411 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 6907 flow [2024-06-21 17:41:30,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6907, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-21 17:41:30,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 17:41:30,412 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 6907 flow [2024-06-21 17:41:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:30,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:41:30,412 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:30,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1562530887, now seen corresponding path program 12 times [2024-06-21 17:41:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:30,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558473252] [2024-06-21 17:41:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:34,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558473252] [2024-06-21 17:41:34,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558473252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:34,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:34,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335434692] [2024-06-21 17:41:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:34,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:34,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:34,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:34,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:34,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:34,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:36,078 INFO L124 PetriNetUnfolderBase]: 3208/5267 cut-off events. [2024-06-21 17:41:36,078 INFO L125 PetriNetUnfolderBase]: For 658947/658951 co-relation queries the response was YES. [2024-06-21 17:41:36,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40787 conditions, 5267 events. 3208/5267 cut-off events. For 658947/658951 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33272 event pairs, 635 based on Foata normal form. 3/5268 useless extension candidates. Maximal degree in co-relation 40610. Up to 4640 conditions per place. [2024-06-21 17:41:36,161 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 140 changer transitions 0/552 dead transitions. [2024-06-21 17:41:36,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 552 transitions, 8273 flow [2024-06-21 17:41:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:41:36,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-21 17:41:36,162 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 6907 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:41:36,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 552 transitions, 8273 flow [2024-06-21 17:41:39,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 552 transitions, 8091 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 17:41:39,226 INFO L231 Difference]: Finished difference. Result has 417 places, 529 transitions, 7011 flow [2024-06-21 17:41:39,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7011, PETRI_PLACES=417, PETRI_TRANSITIONS=529} [2024-06-21 17:41:39,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 17:41:39,227 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 529 transitions, 7011 flow [2024-06-21 17:41:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:39,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:39,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:41:39,228 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:39,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash 104355321, now seen corresponding path program 4 times [2024-06-21 17:41:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570888398] [2024-06-21 17:41:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:42,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:42,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570888398] [2024-06-21 17:41:42,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570888398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:42,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:42,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:42,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324550408] [2024-06-21 17:41:42,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:42,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:42,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:42,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:42,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:42,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:42,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 529 transitions, 7011 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:42,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:42,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:42,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:44,050 INFO L124 PetriNetUnfolderBase]: 3190/5242 cut-off events. [2024-06-21 17:41:44,050 INFO L125 PetriNetUnfolderBase]: For 664450/664456 co-relation queries the response was YES. [2024-06-21 17:41:44,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39967 conditions, 5242 events. 3190/5242 cut-off events. For 664450/664456 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32995 event pairs, 471 based on Foata normal form. 14/5254 useless extension candidates. Maximal degree in co-relation 39789. Up to 4423 conditions per place. [2024-06-21 17:41:44,130 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 492 selfloop transitions, 78 changer transitions 0/575 dead transitions. [2024-06-21 17:41:44,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 575 transitions, 8331 flow [2024-06-21 17:41:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:41:44,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:41:44,131 INFO L175 Difference]: Start difference. First operand has 417 places, 529 transitions, 7011 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:41:44,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 575 transitions, 8331 flow [2024-06-21 17:41:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 8045 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:46,935 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 6891 flow [2024-06-21 17:41:46,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6891, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-21 17:41:46,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 17:41:46,936 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 6891 flow [2024-06-21 17:41:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:46,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:46,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:46,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:41:46,936 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:46,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1411406439, now seen corresponding path program 13 times [2024-06-21 17:41:46,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:46,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960531978] [2024-06-21 17:41:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:50,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:50,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960531978] [2024-06-21 17:41:50,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960531978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:50,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:50,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:50,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753962363] [2024-06-21 17:41:50,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:50,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:50,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 6891 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:50,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:50,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:50,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:52,391 INFO L124 PetriNetUnfolderBase]: 3203/5258 cut-off events. [2024-06-21 17:41:52,392 INFO L125 PetriNetUnfolderBase]: For 643014/643022 co-relation queries the response was YES. [2024-06-21 17:41:52,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40407 conditions, 5258 events. 3203/5258 cut-off events. For 643014/643022 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33195 event pairs, 637 based on Foata normal form. 2/5253 useless extension candidates. Maximal degree in co-relation 40228. Up to 4429 conditions per place. [2024-06-21 17:41:52,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 216 changer transitions 0/567 dead transitions. [2024-06-21 17:41:52,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 567 transitions, 8685 flow [2024-06-21 17:41:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:41:52,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 17:41:52,465 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 6891 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:41:52,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 567 transitions, 8685 flow [2024-06-21 17:41:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 567 transitions, 8495 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 17:41:55,069 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 7301 flow [2024-06-21 17:41:55,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6713, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7301, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-21 17:41:55,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 17:41:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 7301 flow [2024-06-21 17:41:55,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:55,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:55,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:41:55,070 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:41:55,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2119578755, now seen corresponding path program 14 times [2024-06-21 17:41:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921654557] [2024-06-21 17:41:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:58,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921654557] [2024-06-21 17:41:58,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921654557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:58,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:58,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364014506] [2024-06-21 17:41:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:58,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:58,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:58,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:41:58,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 7301 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:58,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:58,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:41:58,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:00,358 INFO L124 PetriNetUnfolderBase]: 3208/5255 cut-off events. [2024-06-21 17:42:00,358 INFO L125 PetriNetUnfolderBase]: For 622446/622454 co-relation queries the response was YES. [2024-06-21 17:42:00,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40244 conditions, 5255 events. 3208/5255 cut-off events. For 622446/622454 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 33024 event pairs, 631 based on Foata normal form. 2/5250 useless extension candidates. Maximal degree in co-relation 40066. Up to 4435 conditions per place. [2024-06-21 17:42:00,425 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 216 changer transitions 0/566 dead transitions. [2024-06-21 17:42:00,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 566 transitions, 9004 flow [2024-06-21 17:42:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:42:00,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:42:00,427 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 7301 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:42:00,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 566 transitions, 9004 flow [2024-06-21 17:42:03,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 566 transitions, 8564 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:03,047 INFO L231 Difference]: Finished difference. Result has 422 places, 538 transitions, 7384 flow [2024-06-21 17:42:03,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7384, PETRI_PLACES=422, PETRI_TRANSITIONS=538} [2024-06-21 17:42:03,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 17:42:03,048 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 538 transitions, 7384 flow [2024-06-21 17:42:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:03,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:03,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:42:03,048 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:03,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2119579127, now seen corresponding path program 7 times [2024-06-21 17:42:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:03,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344216876] [2024-06-21 17:42:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:06,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:06,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344216876] [2024-06-21 17:42:06,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344216876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:06,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:06,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795482440] [2024-06-21 17:42:06,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:06,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:06,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 538 transitions, 7384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:06,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:06,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:08,261 INFO L124 PetriNetUnfolderBase]: 3234/5305 cut-off events. [2024-06-21 17:42:08,261 INFO L125 PetriNetUnfolderBase]: For 639241/639260 co-relation queries the response was YES. [2024-06-21 17:42:08,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40631 conditions, 5305 events. 3234/5305 cut-off events. For 639241/639260 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 33513 event pairs, 618 based on Foata normal form. 16/5317 useless extension candidates. Maximal degree in co-relation 40452. Up to 4766 conditions per place. [2024-06-21 17:42:08,343 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 105 changer transitions 0/576 dead transitions. [2024-06-21 17:42:08,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 576 transitions, 8914 flow [2024-06-21 17:42:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:42:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:42:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:42:08,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:42:08,345 INFO L175 Difference]: Start difference. First operand has 422 places, 538 transitions, 7384 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:42:08,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 576 transitions, 8914 flow [2024-06-21 17:42:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 576 transitions, 8474 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:11,045 INFO L231 Difference]: Finished difference. Result has 426 places, 544 transitions, 7250 flow [2024-06-21 17:42:11,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7250, PETRI_PLACES=426, PETRI_TRANSITIONS=544} [2024-06-21 17:42:11,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 17:42:11,046 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 544 transitions, 7250 flow [2024-06-21 17:42:11,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:11,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:11,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:11,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:42:11,046 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:11,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -539962583, now seen corresponding path program 15 times [2024-06-21 17:42:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:11,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441475942] [2024-06-21 17:42:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441475942] [2024-06-21 17:42:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441475942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:14,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:14,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:14,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520807819] [2024-06-21 17:42:14,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:14,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:14,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:14,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:14,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:14,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 544 transitions, 7250 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:14,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:14,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:14,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:16,216 INFO L124 PetriNetUnfolderBase]: 3247/5321 cut-off events. [2024-06-21 17:42:16,216 INFO L125 PetriNetUnfolderBase]: For 649453/649461 co-relation queries the response was YES. [2024-06-21 17:42:16,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40698 conditions, 5321 events. 3247/5321 cut-off events. For 649453/649461 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33539 event pairs, 638 based on Foata normal form. 2/5316 useless extension candidates. Maximal degree in co-relation 40518. Up to 4486 conditions per place. [2024-06-21 17:42:16,300 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 227 changer transitions 0/574 dead transitions. [2024-06-21 17:42:16,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 574 transitions, 8997 flow [2024-06-21 17:42:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:42:16,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:42:16,302 INFO L175 Difference]: Start difference. First operand has 426 places, 544 transitions, 7250 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:42:16,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 574 transitions, 8997 flow [2024-06-21 17:42:19,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 574 transitions, 8830 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:19,317 INFO L231 Difference]: Finished difference. Result has 429 places, 550 transitions, 7660 flow [2024-06-21 17:42:19,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7083, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7660, PETRI_PLACES=429, PETRI_TRANSITIONS=550} [2024-06-21 17:42:19,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 17:42:19,318 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 550 transitions, 7660 flow [2024-06-21 17:42:19,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:19,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:19,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:19,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:42:19,319 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:19,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash 630474789, now seen corresponding path program 16 times [2024-06-21 17:42:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:19,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788185319] [2024-06-21 17:42:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:19,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788185319] [2024-06-21 17:42:22,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788185319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:22,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:22,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:22,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031427914] [2024-06-21 17:42:22,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:22,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:22,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:22,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:22,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:22,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:22,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 550 transitions, 7660 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:22,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:22,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:22,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:25,120 INFO L124 PetriNetUnfolderBase]: 3276/5375 cut-off events. [2024-06-21 17:42:25,120 INFO L125 PetriNetUnfolderBase]: For 681363/681371 co-relation queries the response was YES. [2024-06-21 17:42:25,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42021 conditions, 5375 events. 3276/5375 cut-off events. For 681363/681371 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34011 event pairs, 640 based on Foata normal form. 2/5370 useless extension candidates. Maximal degree in co-relation 41839. Up to 4519 conditions per place. [2024-06-21 17:42:25,209 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 219 changer transitions 0/596 dead transitions. [2024-06-21 17:42:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 596 transitions, 10080 flow [2024-06-21 17:42:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:42:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 17:42:25,210 INFO L175 Difference]: Start difference. First operand has 429 places, 550 transitions, 7660 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:42:25,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 596 transitions, 10080 flow [2024-06-21 17:42:28,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 596 transitions, 9708 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:28,243 INFO L231 Difference]: Finished difference. Result has 433 places, 562 transitions, 8014 flow [2024-06-21 17:42:28,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7324, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8014, PETRI_PLACES=433, PETRI_TRANSITIONS=562} [2024-06-21 17:42:28,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-21 17:42:28,244 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 562 transitions, 8014 flow [2024-06-21 17:42:28,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:28,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:28,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:28,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:42:28,244 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:28,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash -539546501, now seen corresponding path program 8 times [2024-06-21 17:42:28,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:28,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731686079] [2024-06-21 17:42:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:28,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:30,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:30,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731686079] [2024-06-21 17:42:30,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731686079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:30,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:30,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753513663] [2024-06-21 17:42:30,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:30,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:30,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:30,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 562 transitions, 8014 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:30,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:30,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:30,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:33,111 INFO L124 PetriNetUnfolderBase]: 3318/5441 cut-off events. [2024-06-21 17:42:33,111 INFO L125 PetriNetUnfolderBase]: For 723799/723818 co-relation queries the response was YES. [2024-06-21 17:42:33,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42940 conditions, 5441 events. 3318/5441 cut-off events. For 723799/723818 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34445 event pairs, 566 based on Foata normal form. 16/5453 useless extension candidates. Maximal degree in co-relation 42757. Up to 4550 conditions per place. [2024-06-21 17:42:33,195 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 187 changer transitions 0/605 dead transitions. [2024-06-21 17:42:33,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 605 transitions, 9938 flow [2024-06-21 17:42:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:42:33,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:42:33,197 INFO L175 Difference]: Start difference. First operand has 433 places, 562 transitions, 8014 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:42:33,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 605 transitions, 9938 flow [2024-06-21 17:42:36,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 605 transitions, 9062 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-21 17:42:36,673 INFO L231 Difference]: Finished difference. Result has 433 places, 574 transitions, 7726 flow [2024-06-21 17:42:36,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7726, PETRI_PLACES=433, PETRI_TRANSITIONS=574} [2024-06-21 17:42:36,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-21 17:42:36,674 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 574 transitions, 7726 flow [2024-06-21 17:42:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:36,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:42:36,674 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:36,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1821125129, now seen corresponding path program 9 times [2024-06-21 17:42:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:36,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232256895] [2024-06-21 17:42:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232256895] [2024-06-21 17:42:39,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232256895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:39,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:39,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042538734] [2024-06-21 17:42:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:39,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:39,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 574 transitions, 7726 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:39,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:39,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:39,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:41,504 INFO L124 PetriNetUnfolderBase]: 3312/5419 cut-off events. [2024-06-21 17:42:41,504 INFO L125 PetriNetUnfolderBase]: For 721544/721563 co-relation queries the response was YES. [2024-06-21 17:42:41,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42714 conditions, 5419 events. 3312/5419 cut-off events. For 721544/721563 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34239 event pairs, 619 based on Foata normal form. 16/5431 useless extension candidates. Maximal degree in co-relation 42531. Up to 4887 conditions per place. [2024-06-21 17:42:41,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 102 changer transitions 0/599 dead transitions. [2024-06-21 17:42:41,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 599 transitions, 8988 flow [2024-06-21 17:42:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:42:41,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:42:41,592 INFO L175 Difference]: Start difference. First operand has 433 places, 574 transitions, 7726 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:42:41,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 599 transitions, 8988 flow [2024-06-21 17:42:44,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 599 transitions, 8782 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 17:42:44,743 INFO L231 Difference]: Finished difference. Result has 438 places, 574 transitions, 7730 flow [2024-06-21 17:42:44,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7730, PETRI_PLACES=438, PETRI_TRANSITIONS=574} [2024-06-21 17:42:44,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 17:42:44,743 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 574 transitions, 7730 flow [2024-06-21 17:42:44,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:44,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:44,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:44,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:42:44,744 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:44,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash 630773319, now seen corresponding path program 17 times [2024-06-21 17:42:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:44,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45130543] [2024-06-21 17:42:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:47,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:47,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45130543] [2024-06-21 17:42:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45130543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:47,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:47,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605890254] [2024-06-21 17:42:47,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:47,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:47,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 574 transitions, 7730 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:47,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:47,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:47,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:50,035 INFO L124 PetriNetUnfolderBase]: 3309/5421 cut-off events. [2024-06-21 17:42:50,035 INFO L125 PetriNetUnfolderBase]: For 720306/720314 co-relation queries the response was YES. [2024-06-21 17:42:50,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42773 conditions, 5421 events. 3309/5421 cut-off events. For 720306/720314 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34278 event pairs, 645 based on Foata normal form. 2/5416 useless extension candidates. Maximal degree in co-relation 42588. Up to 4566 conditions per place. [2024-06-21 17:42:50,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 217 changer transitions 0/604 dead transitions. [2024-06-21 17:42:50,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 604 transitions, 9896 flow [2024-06-21 17:42:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:42:50,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 17:42:50,121 INFO L175 Difference]: Start difference. First operand has 438 places, 574 transitions, 7730 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:42:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 604 transitions, 9896 flow [2024-06-21 17:42:53,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 604 transitions, 9674 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:42:53,353 INFO L231 Difference]: Finished difference. Result has 440 places, 574 transitions, 7948 flow [2024-06-21 17:42:53,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7508, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7948, PETRI_PLACES=440, PETRI_TRANSITIONS=574} [2024-06-21 17:42:53,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-21 17:42:53,353 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 574 transitions, 7948 flow [2024-06-21 17:42:53,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:53,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:53,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:53,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:42:53,354 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:42:53,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 625112409, now seen corresponding path program 18 times [2024-06-21 17:42:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:53,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35419753] [2024-06-21 17:42:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:56,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:56,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35419753] [2024-06-21 17:42:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35419753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:56,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:56,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:42:56,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343861075] [2024-06-21 17:42:56,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:56,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:42:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:42:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:42:57,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:42:57,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 574 transitions, 7948 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:57,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:57,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:42:57,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:59,037 INFO L124 PetriNetUnfolderBase]: 3306/5413 cut-off events. [2024-06-21 17:42:59,038 INFO L125 PetriNetUnfolderBase]: For 725306/725314 co-relation queries the response was YES. [2024-06-21 17:42:59,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42713 conditions, 5413 events. 3306/5413 cut-off events. For 725306/725314 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34210 event pairs, 641 based on Foata normal form. 2/5408 useless extension candidates. Maximal degree in co-relation 42527. Up to 4563 conditions per place. [2024-06-21 17:42:59,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 224 changer transitions 0/607 dead transitions. [2024-06-21 17:42:59,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 607 transitions, 9914 flow [2024-06-21 17:42:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:42:59,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:42:59,123 INFO L175 Difference]: Start difference. First operand has 440 places, 574 transitions, 7948 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:42:59,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 607 transitions, 9914 flow [2024-06-21 17:43:02,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 607 transitions, 9431 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:43:02,421 INFO L231 Difference]: Finished difference. Result has 443 places, 574 transitions, 7919 flow [2024-06-21 17:43:02,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7465, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7919, PETRI_PLACES=443, PETRI_TRANSITIONS=574} [2024-06-21 17:43:02,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-21 17:43:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 574 transitions, 7919 flow [2024-06-21 17:43:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:02,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:02,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:02,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 17:43:02,423 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:02,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -650389227, now seen corresponding path program 10 times [2024-06-21 17:43:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250168900] [2024-06-21 17:43:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:05,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:05,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250168900] [2024-06-21 17:43:05,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250168900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:05,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:05,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:05,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386397378] [2024-06-21 17:43:05,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:05,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:05,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:05,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:43:05,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 574 transitions, 7919 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:43:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:07,831 INFO L124 PetriNetUnfolderBase]: 3300/5413 cut-off events. [2024-06-21 17:43:07,831 INFO L125 PetriNetUnfolderBase]: For 730925/730944 co-relation queries the response was YES. [2024-06-21 17:43:07,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42545 conditions, 5413 events. 3300/5413 cut-off events. For 730925/730944 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34321 event pairs, 619 based on Foata normal form. 16/5425 useless extension candidates. Maximal degree in co-relation 42358. Up to 4798 conditions per place. [2024-06-21 17:43:07,920 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 122 changer transitions 0/609 dead transitions. [2024-06-21 17:43:07,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 609 transitions, 9677 flow [2024-06-21 17:43:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:43:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:43:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-21 17:43:07,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-21 17:43:07,921 INFO L175 Difference]: Start difference. First operand has 443 places, 574 transitions, 7919 flow. Second operand 11 states and 181 transitions. [2024-06-21 17:43:07,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 609 transitions, 9677 flow [2024-06-21 17:43:11,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 609 transitions, 9171 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:43:11,262 INFO L231 Difference]: Finished difference. Result has 446 places, 574 transitions, 7663 flow [2024-06-21 17:43:11,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7413, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7663, PETRI_PLACES=446, PETRI_TRANSITIONS=574} [2024-06-21 17:43:11,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 17:43:11,262 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 574 transitions, 7663 flow [2024-06-21 17:43:11,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:11,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:11,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:11,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 17:43:11,263 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:11,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash -655930539, now seen corresponding path program 19 times [2024-06-21 17:43:11,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:11,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330711977] [2024-06-21 17:43:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:11,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:14,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330711977] [2024-06-21 17:43:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330711977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:14,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:14,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433685341] [2024-06-21 17:43:14,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:14,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:14,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:43:14,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 574 transitions, 7663 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:14,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:14,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:43:14,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:16,928 INFO L124 PetriNetUnfolderBase]: 3310/5415 cut-off events. [2024-06-21 17:43:16,929 INFO L125 PetriNetUnfolderBase]: For 735525/735533 co-relation queries the response was YES. [2024-06-21 17:43:16,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42436 conditions, 5415 events. 3310/5415 cut-off events. For 735525/735533 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34210 event pairs, 636 based on Foata normal form. 2/5410 useless extension candidates. Maximal degree in co-relation 42248. Up to 4822 conditions per place. [2024-06-21 17:43:17,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 117 changer transitions 0/606 dead transitions. [2024-06-21 17:43:17,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 606 transitions, 9018 flow [2024-06-21 17:43:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:43:17,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:43:17,015 INFO L175 Difference]: Start difference. First operand has 446 places, 574 transitions, 7663 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:43:17,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 606 transitions, 9018 flow [2024-06-21 17:43:20,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 606 transitions, 8634 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 17:43:20,345 INFO L231 Difference]: Finished difference. Result has 444 places, 580 transitions, 7606 flow [2024-06-21 17:43:20,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7279, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7606, PETRI_PLACES=444, PETRI_TRANSITIONS=580} [2024-06-21 17:43:20,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 17:43:20,346 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 580 transitions, 7606 flow [2024-06-21 17:43:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:20,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:20,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 17:43:20,346 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:20,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1639475733, now seen corresponding path program 13 times [2024-06-21 17:43:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:20,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300535490] [2024-06-21 17:43:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300535490] [2024-06-21 17:43:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300535490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:23,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906227753] [2024-06-21 17:43:23,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:23,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:43:23,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 580 transitions, 7606 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:23,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:23,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:43:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:25,696 INFO L124 PetriNetUnfolderBase]: 3320/5433 cut-off events. [2024-06-21 17:43:25,696 INFO L125 PetriNetUnfolderBase]: For 754415/754423 co-relation queries the response was YES. [2024-06-21 17:43:25,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42364 conditions, 5433 events. 3320/5433 cut-off events. For 754415/754423 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 34332 event pairs, 633 based on Foata normal form. 3/5429 useless extension candidates. Maximal degree in co-relation 42176. Up to 4785 conditions per place. [2024-06-21 17:43:25,782 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 132 changer transitions 0/615 dead transitions. [2024-06-21 17:43:25,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 615 transitions, 9197 flow [2024-06-21 17:43:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:43:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:43:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 17:43:25,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-21 17:43:25,784 INFO L175 Difference]: Start difference. First operand has 444 places, 580 transitions, 7606 flow. Second operand 11 states and 179 transitions. [2024-06-21 17:43:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 615 transitions, 9197 flow [2024-06-21 17:43:29,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 615 transitions, 8943 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:43:29,244 INFO L231 Difference]: Finished difference. Result has 449 places, 583 transitions, 7679 flow [2024-06-21 17:43:29,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7679, PETRI_PLACES=449, PETRI_TRANSITIONS=583} [2024-06-21 17:43:29,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-21 17:43:29,245 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 583 transitions, 7679 flow [2024-06-21 17:43:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:29,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:29,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 17:43:29,246 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:29,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -646675923, now seen corresponding path program 14 times [2024-06-21 17:43:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867290442] [2024-06-21 17:43:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867290442] [2024-06-21 17:43:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867290442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:32,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:32,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:32,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436141091] [2024-06-21 17:43:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:32,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:43:32,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 583 transitions, 7679 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:32,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:32,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:43:32,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:34,974 INFO L124 PetriNetUnfolderBase]: 3330/5451 cut-off events. [2024-06-21 17:43:34,975 INFO L125 PetriNetUnfolderBase]: For 766993/767001 co-relation queries the response was YES. [2024-06-21 17:43:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42647 conditions, 5451 events. 3330/5451 cut-off events. For 766993/767001 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34520 event pairs, 639 based on Foata normal form. 3/5447 useless extension candidates. Maximal degree in co-relation 42458. Up to 4795 conditions per place. [2024-06-21 17:43:35,056 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 131 changer transitions 0/617 dead transitions. [2024-06-21 17:43:35,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 617 transitions, 9508 flow [2024-06-21 17:43:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:43:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:43:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 17:43:35,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:43:35,058 INFO L175 Difference]: Start difference. First operand has 449 places, 583 transitions, 7679 flow. Second operand 12 states and 192 transitions. [2024-06-21 17:43:35,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 617 transitions, 9508 flow [2024-06-21 17:43:38,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 617 transitions, 9048 flow, removed 45 selfloop flow, removed 10 redundant places. [2024-06-21 17:43:38,514 INFO L231 Difference]: Finished difference. Result has 451 places, 586 transitions, 7550 flow [2024-06-21 17:43:38,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7241, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7550, PETRI_PLACES=451, PETRI_TRANSITIONS=586} [2024-06-21 17:43:38,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 17:43:38,515 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 586 transitions, 7550 flow [2024-06-21 17:43:38,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:38,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:38,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:38,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 17:43:38,516 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:38,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash 634492389, now seen corresponding path program 20 times [2024-06-21 17:43:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:38,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036638005] [2024-06-21 17:43:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036638005] [2024-06-21 17:43:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036638005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:41,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:41,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:41,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521476948] [2024-06-21 17:43:41,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:42,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:43:42,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 586 transitions, 7550 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:42,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:42,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:43:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:44,009 INFO L124 PetriNetUnfolderBase]: 3327/5455 cut-off events. [2024-06-21 17:43:44,010 INFO L125 PetriNetUnfolderBase]: For 764405/764413 co-relation queries the response was YES. [2024-06-21 17:43:44,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42202 conditions, 5455 events. 3327/5455 cut-off events. For 764405/764413 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34604 event pairs, 644 based on Foata normal form. 2/5450 useless extension candidates. Maximal degree in co-relation 42013. Up to 4836 conditions per place. [2024-06-21 17:43:44,090 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 123 changer transitions 0/609 dead transitions. [2024-06-21 17:43:44,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 609 transitions, 9054 flow [2024-06-21 17:43:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:43:44,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:43:44,092 INFO L175 Difference]: Start difference. First operand has 451 places, 586 transitions, 7550 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:43:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 609 transitions, 9054 flow [2024-06-21 17:43:47,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 609 transitions, 8698 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 17:43:47,799 INFO L231 Difference]: Finished difference. Result has 452 places, 586 transitions, 7446 flow [2024-06-21 17:43:47,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7446, PETRI_PLACES=452, PETRI_TRANSITIONS=586} [2024-06-21 17:43:47,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-21 17:43:47,799 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 586 transitions, 7446 flow [2024-06-21 17:43:47,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:47,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:47,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:47,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 17:43:47,800 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:47,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1374651541, now seen corresponding path program 11 times [2024-06-21 17:43:47,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:47,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61654398] [2024-06-21 17:43:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:47,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:51,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:51,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61654398] [2024-06-21 17:43:51,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61654398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:51,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709968341] [2024-06-21 17:43:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:51,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:43:51,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 586 transitions, 7446 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:51,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:51,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:43:51,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:53,613 INFO L124 PetriNetUnfolderBase]: 3337/5463 cut-off events. [2024-06-21 17:43:53,614 INFO L125 PetriNetUnfolderBase]: For 781147/781166 co-relation queries the response was YES. [2024-06-21 17:43:53,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41969 conditions, 5463 events. 3337/5463 cut-off events. For 781147/781166 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34595 event pairs, 615 based on Foata normal form. 16/5475 useless extension candidates. Maximal degree in co-relation 41779. Up to 4980 conditions per place. [2024-06-21 17:43:53,693 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 67 changer transitions 0/620 dead transitions. [2024-06-21 17:43:53,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 620 transitions, 9044 flow [2024-06-21 17:43:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:43:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:43:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 17:43:53,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-21 17:43:53,694 INFO L175 Difference]: Start difference. First operand has 452 places, 586 transitions, 7446 flow. Second operand 11 states and 174 transitions. [2024-06-21 17:43:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 620 transitions, 9044 flow [2024-06-21 17:43:56,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 620 transitions, 8755 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:43:56,949 INFO L231 Difference]: Finished difference. Result has 456 places, 589 transitions, 7343 flow [2024-06-21 17:43:56,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7343, PETRI_PLACES=456, PETRI_TRANSITIONS=589} [2024-06-21 17:43:56,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-21 17:43:56,950 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 589 transitions, 7343 flow [2024-06-21 17:43:56,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:56,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:56,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:56,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 17:43:56,951 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:43:56,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:56,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1230940165, now seen corresponding path program 21 times [2024-06-21 17:43:56,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:56,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559545016] [2024-06-21 17:43:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:00,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559545016] [2024-06-21 17:44:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559545016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025171143] [2024-06-21 17:44:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:00,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:00,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:44:00,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 589 transitions, 7343 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:00,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:00,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:44:00,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:02,699 INFO L124 PetriNetUnfolderBase]: 3334/5469 cut-off events. [2024-06-21 17:44:02,700 INFO L125 PetriNetUnfolderBase]: For 778144/778152 co-relation queries the response was YES. [2024-06-21 17:44:02,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41780 conditions, 5469 events. 3334/5469 cut-off events. For 778144/778152 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34704 event pairs, 648 based on Foata normal form. 2/5464 useless extension candidates. Maximal degree in co-relation 41589. Up to 4847 conditions per place. [2024-06-21 17:44:02,779 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 124 changer transitions 0/613 dead transitions. [2024-06-21 17:44:02,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 613 transitions, 8623 flow [2024-06-21 17:44:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:44:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:44:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-21 17:44:02,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-21 17:44:02,781 INFO L175 Difference]: Start difference. First operand has 456 places, 589 transitions, 7343 flow. Second operand 11 states and 173 transitions. [2024-06-21 17:44:02,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 613 transitions, 8623 flow [2024-06-21 17:44:05,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 613 transitions, 8451 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:44:05,667 INFO L231 Difference]: Finished difference. Result has 459 places, 589 transitions, 7425 flow [2024-06-21 17:44:05,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7171, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7425, PETRI_PLACES=459, PETRI_TRANSITIONS=589} [2024-06-21 17:44:05,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-21 17:44:05,676 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 589 transitions, 7425 flow [2024-06-21 17:44:05,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:05,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:05,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:05,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 17:44:05,677 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:05,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash 634498341, now seen corresponding path program 12 times [2024-06-21 17:44:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226036929] [2024-06-21 17:44:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:08,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:08,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226036929] [2024-06-21 17:44:08,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226036929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:08,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:08,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:08,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097245782] [2024-06-21 17:44:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:08,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:08,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:09,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:44:09,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 589 transitions, 7425 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:09,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:09,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:44:09,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:11,207 INFO L124 PetriNetUnfolderBase]: 3328/5461 cut-off events. [2024-06-21 17:44:11,208 INFO L125 PetriNetUnfolderBase]: For 783985/784004 co-relation queries the response was YES. [2024-06-21 17:44:11,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41684 conditions, 5461 events. 3328/5461 cut-off events. For 783985/784004 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34716 event pairs, 619 based on Foata normal form. 16/5473 useless extension candidates. Maximal degree in co-relation 41492. Up to 4971 conditions per place. [2024-06-21 17:44:11,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 67 changer transitions 0/620 dead transitions. [2024-06-21 17:44:11,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 620 transitions, 8741 flow [2024-06-21 17:44:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:44:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:44:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-21 17:44:11,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 17:44:11,298 INFO L175 Difference]: Start difference. First operand has 459 places, 589 transitions, 7425 flow. Second operand 12 states and 184 transitions. [2024-06-21 17:44:11,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 620 transitions, 8741 flow [2024-06-21 17:44:14,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 620 transitions, 8463 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 17:44:14,657 INFO L231 Difference]: Finished difference. Result has 461 places, 589 transitions, 7287 flow [2024-06-21 17:44:14,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7147, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7287, PETRI_PLACES=461, PETRI_TRANSITIONS=589} [2024-06-21 17:44:14,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-21 17:44:14,657 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 589 transitions, 7287 flow [2024-06-21 17:44:14,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:14,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:14,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:14,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 17:44:14,658 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:14,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash 634498155, now seen corresponding path program 15 times [2024-06-21 17:44:14,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:14,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394606935] [2024-06-21 17:44:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:14,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:17,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394606935] [2024-06-21 17:44:17,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394606935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925622470] [2024-06-21 17:44:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:18,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:44:18,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 589 transitions, 7287 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:44:18,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:19,947 INFO L124 PetriNetUnfolderBase]: 3322/5437 cut-off events. [2024-06-21 17:44:19,948 INFO L125 PetriNetUnfolderBase]: For 781323/781331 co-relation queries the response was YES. [2024-06-21 17:44:20,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41320 conditions, 5437 events. 3322/5437 cut-off events. For 781323/781331 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34399 event pairs, 632 based on Foata normal form. 3/5433 useless extension candidates. Maximal degree in co-relation 41127. Up to 4788 conditions per place. [2024-06-21 17:44:20,034 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 130 changer transitions 0/616 dead transitions. [2024-06-21 17:44:20,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 616 transitions, 8821 flow [2024-06-21 17:44:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:44:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:44:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 17:44:20,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 17:44:20,036 INFO L175 Difference]: Start difference. First operand has 461 places, 589 transitions, 7287 flow. Second operand 10 states and 166 transitions. [2024-06-21 17:44:20,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 616 transitions, 8821 flow [2024-06-21 17:44:23,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 616 transitions, 8621 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 17:44:23,183 INFO L231 Difference]: Finished difference. Result has 458 places, 589 transitions, 7353 flow [2024-06-21 17:44:23,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7353, PETRI_PLACES=458, PETRI_TRANSITIONS=589} [2024-06-21 17:44:23,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-21 17:44:23,184 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 589 transitions, 7353 flow [2024-06-21 17:44:23,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:23,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:23,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:23,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 17:44:23,184 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:23,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1758679231, now seen corresponding path program 13 times [2024-06-21 17:44:23,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:23,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984267305] [2024-06-21 17:44:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:23,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:26,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:26,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984267305] [2024-06-21 17:44:26,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984267305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:26,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:26,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265021418] [2024-06-21 17:44:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:26,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:44:26,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 589 transitions, 7353 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:26,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:26,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:44:26,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:28,434 INFO L124 PetriNetUnfolderBase]: 3412/5595 cut-off events. [2024-06-21 17:44:28,434 INFO L125 PetriNetUnfolderBase]: For 869232/869251 co-relation queries the response was YES. [2024-06-21 17:44:28,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43606 conditions, 5595 events. 3412/5595 cut-off events. For 869232/869251 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35742 event pairs, 570 based on Foata normal form. 16/5607 useless extension candidates. Maximal degree in co-relation 43412. Up to 4874 conditions per place. [2024-06-21 17:44:28,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 490 selfloop transitions, 142 changer transitions 0/637 dead transitions. [2024-06-21 17:44:28,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 637 transitions, 9455 flow [2024-06-21 17:44:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:44:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:44:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 17:44:28,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-21 17:44:28,527 INFO L175 Difference]: Start difference. First operand has 458 places, 589 transitions, 7353 flow. Second operand 11 states and 178 transitions. [2024-06-21 17:44:28,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 637 transitions, 9455 flow [2024-06-21 17:44:32,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 637 transitions, 9195 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 17:44:32,260 INFO L231 Difference]: Finished difference. Result has 461 places, 607 transitions, 7693 flow [2024-06-21 17:44:32,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7693, PETRI_PLACES=461, PETRI_TRANSITIONS=607} [2024-06-21 17:44:32,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-21 17:44:32,261 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 607 transitions, 7693 flow [2024-06-21 17:44:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:32,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:32,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:32,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 17:44:32,261 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:32,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1260487527, now seen corresponding path program 14 times [2024-06-21 17:44:32,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:32,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181185825] [2024-06-21 17:44:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:32,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:35,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181185825] [2024-06-21 17:44:35,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181185825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:35,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:35,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:35,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568012814] [2024-06-21 17:44:35,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:35,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:35,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:44:35,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 607 transitions, 7693 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:35,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:35,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:44:35,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:37,325 INFO L124 PetriNetUnfolderBase]: 3406/5579 cut-off events. [2024-06-21 17:44:37,326 INFO L125 PetriNetUnfolderBase]: For 867781/867800 co-relation queries the response was YES. [2024-06-21 17:44:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43611 conditions, 5579 events. 3406/5579 cut-off events. For 867781/867800 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35502 event pairs, 570 based on Foata normal form. 16/5591 useless extension candidates. Maximal degree in co-relation 43415. Up to 4869 conditions per place. [2024-06-21 17:44:37,408 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 138 changer transitions 0/635 dead transitions. [2024-06-21 17:44:37,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 635 transitions, 9521 flow [2024-06-21 17:44:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:44:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:44:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:44:37,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:44:37,410 INFO L175 Difference]: Start difference. First operand has 461 places, 607 transitions, 7693 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:44:37,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 635 transitions, 9521 flow [2024-06-21 17:44:40,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 635 transitions, 9323 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:44:40,848 INFO L231 Difference]: Finished difference. Result has 464 places, 607 transitions, 7777 flow [2024-06-21 17:44:40,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7495, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7777, PETRI_PLACES=464, PETRI_TRANSITIONS=607} [2024-06-21 17:44:40,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 17:44:40,849 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 607 transitions, 7777 flow [2024-06-21 17:44:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:40,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:40,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 17:44:40,850 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:40,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1255362483, now seen corresponding path program 16 times [2024-06-21 17:44:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960928093] [2024-06-21 17:44:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960928093] [2024-06-21 17:44:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960928093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:43,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:43,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:44:43,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703703230] [2024-06-21 17:44:43,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:43,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:44:43,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:43,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:44:43,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:44:43,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:44:43,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 607 transitions, 7777 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:43,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:43,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:44:43,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:46,216 INFO L124 PetriNetUnfolderBase]: 3437/5626 cut-off events. [2024-06-21 17:44:46,216 INFO L125 PetriNetUnfolderBase]: For 897337/897345 co-relation queries the response was YES. [2024-06-21 17:44:46,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44546 conditions, 5626 events. 3437/5626 cut-off events. For 897337/897345 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 35786 event pairs, 606 based on Foata normal form. 3/5622 useless extension candidates. Maximal degree in co-relation 44348. Up to 4628 conditions per place. [2024-06-21 17:44:46,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 211 changer transitions 0/644 dead transitions. [2024-06-21 17:44:46,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 644 transitions, 9830 flow [2024-06-21 17:44:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:44:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:44:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:44:46,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:44:46,298 INFO L175 Difference]: Start difference. First operand has 464 places, 607 transitions, 7777 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:44:46,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 644 transitions, 9830 flow [2024-06-21 17:44:50,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 644 transitions, 9530 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:44:50,613 INFO L231 Difference]: Finished difference. Result has 467 places, 619 transitions, 8165 flow [2024-06-21 17:44:50,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8165, PETRI_PLACES=467, PETRI_TRANSITIONS=619} [2024-06-21 17:44:50,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-21 17:44:50,614 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 619 transitions, 8165 flow [2024-06-21 17:44:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:44:50,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:50,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 17:44:50,615 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:44:50,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -330981657, now seen corresponding path program 15 times [2024-06-21 17:44:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:50,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330645837] [2024-06-21 17:44:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15