./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.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/rfi006_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:42:29,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:42:29,946 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:42:29,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:42:29,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:42:29,962 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:42:29,962 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:42:29,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:42:29,963 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:42:29,963 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:42:29,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:42:29,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:42:29,964 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:42:29,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:42:29,965 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:42:29,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:42:29,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:42:29,966 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:42:29,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:42:29,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:42:29,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:42:29,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:42:29,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:42:29,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:42:29,977 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:42:29,977 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:42:29,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:42:29,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:42:29,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:42:29,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:42:29,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:42:29,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:42:29,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:42:29,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:42:29,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:42:29,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:42:29,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:42:29,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:42:29,980 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:42:29,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:42:29,980 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:42:29,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:42:29,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:42:29,981 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:42:30,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:42:30,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:42:30,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:42:30,178 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:42:30,179 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:42:30,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i [2024-06-27 20:42:31,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:42:31,446 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:42:31,449 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_power.oepc.i [2024-06-27 20:42:31,461 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30fb0828f/246c046955af4da1a1f34a7fa4c5ad8f/FLAGc3905b940 [2024-06-27 20:42:31,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30fb0828f/246c046955af4da1a1f34a7fa4c5ad8f [2024-06-27 20:42:31,480 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:42:31,481 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:42:31,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi006_power.oepc.yml/witness.yml [2024-06-27 20:42:31,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:42:31,647 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:42:31,648 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:42:31,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:42:31,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:42:31,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:42:31" (1/2) ... [2024-06-27 20:42:31,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19834938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:42:31, skipping insertion in model container [2024-06-27 20:42:31,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:42:31" (1/2) ... [2024-06-27 20:42:31,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5eb70c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:42:31, skipping insertion in model container [2024-06-27 20:42:31,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:42:31" (2/2) ... [2024-06-27 20:42:31,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19834938 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:31, skipping insertion in model container [2024-06-27 20:42:31,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:42:31" (2/2) ... [2024-06-27 20:42:31,658 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:42:31,753 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:42:31,754 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:42:31,754 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$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 || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:42:31,755 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:42:31,755 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:42:31,755 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-27 20:42:31,796 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:42:32,071 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:42:32,078 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:42:32,262 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:42:32,288 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:42:32,289 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32 WrapperNode [2024-06-27 20:42:32,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:42:32,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:42:32,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:42:32,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:42:32,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,352 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2024-06-27 20:42:32,353 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:42:32,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:42:32,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:42:32,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:42:32,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,377 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,402 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [2, 33]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 20:42:32,408 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,416 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,418 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,420 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,421 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:42:32,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:42:32,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:42:32,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:42:32,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (1/1) ... [2024-06-27 20:42:32,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:42:32,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:42:32,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:42:32,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:42:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 20:42:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 20:42:32,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 20:42:32,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 20:42:32,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:42:32,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:42:32,498 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:42:32,499 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:42:32,499 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:42:32,499 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:42:32,499 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:42:32,499 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:42:32,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:42:32,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 20:42:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:42:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:42:32,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:42:32,503 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:42:32,648 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:42:32,650 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:42:33,072 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:42:33,072 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:42:33,374 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:42:33,374 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:42:33,375 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:42:33 BoogieIcfgContainer [2024-06-27 20:42:33,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:42:33,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:42:33,378 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:42:33,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:42:33,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:42:31" (1/4) ... [2024-06-27 20:42:33,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ab5b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:42:33, skipping insertion in model container [2024-06-27 20:42:33,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:42:31" (2/4) ... [2024-06-27 20:42:33,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ab5b9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:42:33, skipping insertion in model container [2024-06-27 20:42:33,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:42:32" (3/4) ... [2024-06-27 20:42:33,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ab5b9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:42:33, skipping insertion in model container [2024-06-27 20:42:33,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:42:33" (4/4) ... [2024-06-27 20:42:33,384 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_power.oepc.i [2024-06-27 20:42:33,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:42:33,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:42:33,398 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:42:33,452 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:42:33,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:42:33,516 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:42:33,516 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:42:33,517 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 58 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. [2024-06-27 20:42:33,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:42:33,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:42:33,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:42:33,537 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;@50b7cd92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:42:33,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:42:33,541 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:42:33,541 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:42:33,541 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:42:33,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:33,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:42:33,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:33,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash 731053659, now seen corresponding path program 1 times [2024-06-27 20:42:33,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:33,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143197375] [2024-06-27 20:42:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143197375] [2024-06-27 20:42:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143197375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:35,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:35,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:42:35,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777626902] [2024-06-27 20:42:35,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:42:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:35,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:42:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:42:35,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:42:35,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:35,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:35,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:42:35,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:35,524 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-27 20:42:35,524 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 20:42:35,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7744 event pairs, 650 based on Foata normal form. 1/1551 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-27 20:42:35,534 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:42:35,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-27 20:42:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:42:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:42:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 20:42:35,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 20:42:35,544 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-27 20:42:35,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-27 20:42:35,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:42:35,548 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:42:35,549 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} [2024-06-27 20:42:35,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:42:35,565 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:42:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:35,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:35,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:35,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:42:35,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:35,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1832020518, now seen corresponding path program 1 times [2024-06-27 20:42:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775670138] [2024-06-27 20:42:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775670138] [2024-06-27 20:42:37,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775670138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:37,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:37,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:42:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317757280] [2024-06-27 20:42:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:42:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:42:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:42:37,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:42:37,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:37,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:37,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:42:37,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:38,168 INFO L124 PetriNetUnfolderBase]: 984/1578 cut-off events. [2024-06-27 20:42:38,168 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-27 20:42:38,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1578 events. 984/1578 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7678 event pairs, 540 based on Foata normal form. 3/1573 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-27 20:42:38,177 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 20:42:38,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 256 flow [2024-06-27 20:42:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:42:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:42:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 20:42:38,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 20:42:38,181 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-27 20:42:38,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 256 flow [2024-06-27 20:42:38,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:42:38,184 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:42:38,185 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} [2024-06-27 20:42:38,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:42:38,187 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:42:38,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:38,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:38,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:38,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:42:38,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:38,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash -958059595, now seen corresponding path program 1 times [2024-06-27 20:42:38,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:38,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422254217] [2024-06-27 20:42:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:38,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422254217] [2024-06-27 20:42:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422254217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:40,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:42:40,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483670673] [2024-06-27 20:42:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:40,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:42:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:42:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:42:40,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:42:40,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:40,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:40,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:42:40,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:41,163 INFO L124 PetriNetUnfolderBase]: 1209/1891 cut-off events. [2024-06-27 20:42:41,164 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-27 20:42:41,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 1891 events. 1209/1891 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9088 event pairs, 475 based on Foata normal form. 5/1890 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-27 20:42:41,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-27 20:42:41,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 420 flow [2024-06-27 20:42:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:42:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:42:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 20:42:41,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 20:42:41,178 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 119 transitions. [2024-06-27 20:42:41,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 420 flow [2024-06-27 20:42:41,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 406 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:42:41,181 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:42:41,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 20:42:41,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:42:41,183 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:42:41,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:41,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:41,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:41,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:42:41,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:41,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1001433612, now seen corresponding path program 1 times [2024-06-27 20:42:41,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:41,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569500520] [2024-06-27 20:42:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:43,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569500520] [2024-06-27 20:42:43,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569500520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:43,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:43,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:42:43,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293664194] [2024-06-27 20:42:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:43,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:42:43,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:42:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:42:43,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:42:43,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:43,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:43,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:42:43,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:44,474 INFO L124 PetriNetUnfolderBase]: 1224/1916 cut-off events. [2024-06-27 20:42:44,475 INFO L125 PetriNetUnfolderBase]: For 2351/2354 co-relation queries the response was YES. [2024-06-27 20:42:44,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 1916 events. 1224/1916 cut-off events. For 2351/2354 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9267 event pairs, 330 based on Foata normal form. 12/1922 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-27 20:42:44,483 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-27 20:42:44,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 89 transitions, 527 flow [2024-06-27 20:42:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:42:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:42:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 20:42:44,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-27 20:42:44,485 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 136 transitions. [2024-06-27 20:42:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 89 transitions, 527 flow [2024-06-27 20:42:44,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:42:44,488 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-27 20:42:44,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-27 20:42:44,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:42:44,489 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-27 20:42:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:44,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:44,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:44,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:42:44,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:44,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash 303983584, now seen corresponding path program 1 times [2024-06-27 20:42:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:44,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371840986] [2024-06-27 20:42:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:45,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:45,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371840986] [2024-06-27 20:42:45,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371840986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:45,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:45,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:42:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389526716] [2024-06-27 20:42:45,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:45,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:42:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:42:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:42:45,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:45,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:45,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:45,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:45,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:46,489 INFO L124 PetriNetUnfolderBase]: 1219/1906 cut-off events. [2024-06-27 20:42:46,489 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-27 20:42:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1906 events. 1219/1906 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9133 event pairs, 468 based on Foata normal form. 2/1902 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-27 20:42:46,499 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-27 20:42:46,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 449 flow [2024-06-27 20:42:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:42:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:42:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:42:46,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 20:42:46,503 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:42:46,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 449 flow [2024-06-27 20:42:46,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:42:46,508 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-27 20:42:46,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 20:42:46,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:42:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-27 20:42:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:46,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:46,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:42:46,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:46,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 832924263, now seen corresponding path program 1 times [2024-06-27 20:42:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990019823] [2024-06-27 20:42:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:48,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:48,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990019823] [2024-06-27 20:42:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990019823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:48,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:48,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:42:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043270019] [2024-06-27 20:42:48,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:42:48,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:42:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:42:48,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:48,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 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) [2024-06-27 20:42:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:49,078 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-27 20:42:49,078 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-27 20:42:49,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1894 events. 1209/1894 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9097 event pairs, 438 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-27 20:42:49,087 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 20:42:49,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 473 flow [2024-06-27 20:42:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:42:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:42:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:42:49,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:42:49,089 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:42:49,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 473 flow [2024-06-27 20:42:49,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:42:49,094 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-27 20:42:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 20:42:49,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:42:49,096 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-27 20:42:49,097 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) [2024-06-27 20:42:49,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:49,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:49,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:42:49,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:49,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1906545393, now seen corresponding path program 1 times [2024-06-27 20:42:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:49,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954908166] [2024-06-27 20:42:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954908166] [2024-06-27 20:42:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954908166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:51,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:42:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338103670] [2024-06-27 20:42:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:51,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:42:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:42:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:42:51,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:51,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 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) [2024-06-27 20:42:51,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:51,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:52,610 INFO L124 PetriNetUnfolderBase]: 1217/1905 cut-off events. [2024-06-27 20:42:52,611 INFO L125 PetriNetUnfolderBase]: For 5205/5211 co-relation queries the response was YES. [2024-06-27 20:42:52,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 1905 events. 1217/1905 cut-off events. For 5205/5211 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9161 event pairs, 449 based on Foata normal form. 8/1909 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-27 20:42:52,619 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 20:42:52,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 561 flow [2024-06-27 20:42:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:42:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:42:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:42:52,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:42:52,629 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:42:52,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 561 flow [2024-06-27 20:42:52,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:42:52,633 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-27 20:42:52,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 20:42:52,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 20:42:52,634 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-27 20:42:52,634 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) [2024-06-27 20:42:52,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:52,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:52,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:42:52,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:52,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash 70504543, now seen corresponding path program 2 times [2024-06-27 20:42:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:52,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113794637] [2024-06-27 20:42:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113794637] [2024-06-27 20:42:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113794637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:54,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:54,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:42:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607492865] [2024-06-27 20:42:54,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:42:54,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:54,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:42:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:42:54,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:54,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 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) [2024-06-27 20:42:54,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:54,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:54,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:55,555 INFO L124 PetriNetUnfolderBase]: 1205/1876 cut-off events. [2024-06-27 20:42:55,556 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-27 20:42:55,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 1876 events. 1205/1876 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8926 event pairs, 467 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 6785. Up to 1721 conditions per place. [2024-06-27 20:42:55,566 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-27 20:42:55,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 531 flow [2024-06-27 20:42:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:42:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:42:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:42:55,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:42:55,568 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:42:55,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 531 flow [2024-06-27 20:42:55,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 502 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:42:55,577 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-27 20:42:55,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 20:42:55,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:42:55,578 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-27 20:42:55,579 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) [2024-06-27 20:42:55,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:55,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:55,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:42:55,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:55,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:55,580 INFO L85 PathProgramCache]: Analyzing trace with hash -540655780, now seen corresponding path program 1 times [2024-06-27 20:42:55,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:55,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038194799] [2024-06-27 20:42:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:55,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:57,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:57,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038194799] [2024-06-27 20:42:57,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038194799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:57,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:57,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:42:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296274184] [2024-06-27 20:42:57,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:57,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:42:57,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:42:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:42:57,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:57,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 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) [2024-06-27 20:42:57,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:57,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:59,094 INFO L124 PetriNetUnfolderBase]: 1749/2702 cut-off events. [2024-06-27 20:42:59,094 INFO L125 PetriNetUnfolderBase]: For 10367/10367 co-relation queries the response was YES. [2024-06-27 20:42:59,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9971 conditions, 2702 events. 1749/2702 cut-off events. For 10367/10367 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13564 event pairs, 427 based on Foata normal form. 16/2711 useless extension candidates. Maximal degree in co-relation 9946. Up to 1852 conditions per place. [2024-06-27 20:42:59,106 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 103 selfloop transitions, 57 changer transitions 0/165 dead transitions. [2024-06-27 20:42:59,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 165 transitions, 1271 flow [2024-06-27 20:42:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-27 20:42:59,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:42:59,108 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 12 states and 228 transitions. [2024-06-27 20:42:59,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 165 transitions, 1271 flow [2024-06-27 20:42:59,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 165 transitions, 1145 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:59,120 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 739 flow [2024-06-27 20:42:59,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=739, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2024-06-27 20:42:59,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 20:42:59,121 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 739 flow [2024-06-27 20:42:59,121 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) [2024-06-27 20:42:59,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:59,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:59,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:42:59,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:59,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash 542491518, now seen corresponding path program 2 times [2024-06-27 20:42:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:59,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130810916] [2024-06-27 20:42:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:01,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130810916] [2024-06-27 20:43:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130810916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:01,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372279813] [2024-06-27 20:43:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:01,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:01,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 739 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) [2024-06-27 20:43:01,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:01,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:01,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:02,768 INFO L124 PetriNetUnfolderBase]: 1837/2853 cut-off events. [2024-06-27 20:43:02,768 INFO L125 PetriNetUnfolderBase]: For 18024/18030 co-relation queries the response was YES. [2024-06-27 20:43:02,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13191 conditions, 2853 events. 1837/2853 cut-off events. For 18024/18030 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14525 event pairs, 467 based on Foata normal form. 16/2862 useless extension candidates. Maximal degree in co-relation 13158. Up to 2236 conditions per place. [2024-06-27 20:43:02,784 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 48 changer transitions 0/142 dead transitions. [2024-06-27 20:43:02,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 1251 flow [2024-06-27 20:43:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:43:02,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:43:02,787 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 739 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:43:02,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 1251 flow [2024-06-27 20:43:02,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1209 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 20:43:02,805 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 884 flow [2024-06-27 20:43:02,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-27 20:43:02,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 20:43:02,806 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 884 flow [2024-06-27 20:43:02,806 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) [2024-06-27 20:43:02,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:02,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:02,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:43:02,806 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:02,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2109087302, now seen corresponding path program 3 times [2024-06-27 20:43:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:02,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553076519] [2024-06-27 20:43:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:02,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:05,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553076519] [2024-06-27 20:43:05,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553076519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:05,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:05,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610841922] [2024-06-27 20:43:05,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:05,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:05,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:05,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:05,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 884 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) [2024-06-27 20:43:05,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:05,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:05,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:06,429 INFO L124 PetriNetUnfolderBase]: 1881/2924 cut-off events. [2024-06-27 20:43:06,429 INFO L125 PetriNetUnfolderBase]: For 21570/21578 co-relation queries the response was YES. [2024-06-27 20:43:06,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14321 conditions, 2924 events. 1881/2924 cut-off events. For 21570/21578 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14964 event pairs, 464 based on Foata normal form. 12/2918 useless extension candidates. Maximal degree in co-relation 14286. Up to 2254 conditions per place. [2024-06-27 20:43:06,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 60 changer transitions 0/150 dead transitions. [2024-06-27 20:43:06,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 150 transitions, 1508 flow [2024-06-27 20:43:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:43:06,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 20:43:06,449 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 884 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:43:06,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 150 transitions, 1508 flow [2024-06-27 20:43:06,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 150 transitions, 1390 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:06,476 INFO L231 Difference]: Finished difference. Result has 85 places, 117 transitions, 1042 flow [2024-06-27 20:43:06,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1042, PETRI_PLACES=85, PETRI_TRANSITIONS=117} [2024-06-27 20:43:06,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 20:43:06,477 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 117 transitions, 1042 flow [2024-06-27 20:43:06,477 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) [2024-06-27 20:43:06,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:06,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:06,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:43:06,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:06,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash 719623038, now seen corresponding path program 4 times [2024-06-27 20:43:06,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:06,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769508730] [2024-06-27 20:43:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:06,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769508730] [2024-06-27 20:43:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769508730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:09,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:09,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:09,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897035490] [2024-06-27 20:43:09,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:09,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:09,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 1042 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) [2024-06-27 20:43:09,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:09,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:09,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:10,472 INFO L124 PetriNetUnfolderBase]: 1865/2898 cut-off events. [2024-06-27 20:43:10,472 INFO L125 PetriNetUnfolderBase]: For 21919/21923 co-relation queries the response was YES. [2024-06-27 20:43:10,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14103 conditions, 2898 events. 1865/2898 cut-off events. For 21919/21923 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14717 event pairs, 477 based on Foata normal form. 8/2888 useless extension candidates. Maximal degree in co-relation 14067. Up to 2247 conditions per place. [2024-06-27 20:43:10,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 58 changer transitions 0/148 dead transitions. [2024-06-27 20:43:10,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 148 transitions, 1484 flow [2024-06-27 20:43:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:43:10,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 20:43:10,490 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 1042 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:43:10,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 148 transitions, 1484 flow [2024-06-27 20:43:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 148 transitions, 1384 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:10,520 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1068 flow [2024-06-27 20:43:10,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1068, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-27 20:43:10,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 20:43:10,521 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1068 flow [2024-06-27 20:43:10,521 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) [2024-06-27 20:43:10,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:10,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:10,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:43:10,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:10,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash -355974377, now seen corresponding path program 1 times [2024-06-27 20:43:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:10,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446126891] [2024-06-27 20:43:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:13,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446126891] [2024-06-27 20:43:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446126891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:13,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:13,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699212123] [2024-06-27 20:43:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:13,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:13,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:13,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1068 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) [2024-06-27 20:43:13,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:13,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:15,339 INFO L124 PetriNetUnfolderBase]: 1917/3005 cut-off events. [2024-06-27 20:43:15,339 INFO L125 PetriNetUnfolderBase]: For 24470/24476 co-relation queries the response was YES. [2024-06-27 20:43:15,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14742 conditions, 3005 events. 1917/3005 cut-off events. For 24470/24476 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15649 event pairs, 476 based on Foata normal form. 12/3010 useless extension candidates. Maximal degree in co-relation 14704. Up to 2291 conditions per place. [2024-06-27 20:43:15,358 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 62 changer transitions 0/164 dead transitions. [2024-06-27 20:43:15,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 164 transitions, 1666 flow [2024-06-27 20:43:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:43:15,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:43:15,361 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1068 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:43:15,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 164 transitions, 1666 flow [2024-06-27 20:43:15,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 164 transitions, 1511 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:15,393 INFO L231 Difference]: Finished difference. Result has 91 places, 123 transitions, 1139 flow [2024-06-27 20:43:15,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1139, PETRI_PLACES=91, PETRI_TRANSITIONS=123} [2024-06-27 20:43:15,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 20:43:15,395 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 123 transitions, 1139 flow [2024-06-27 20:43:15,395 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) [2024-06-27 20:43:15,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:15,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:15,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:43:15,396 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:15,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash -362635881, now seen corresponding path program 2 times [2024-06-27 20:43:15,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:15,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333874262] [2024-06-27 20:43:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333874262] [2024-06-27 20:43:17,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333874262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:17,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:17,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124485391] [2024-06-27 20:43:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:17,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:17,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 123 transitions, 1139 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:17,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:19,174 INFO L124 PetriNetUnfolderBase]: 1957/3096 cut-off events. [2024-06-27 20:43:19,174 INFO L125 PetriNetUnfolderBase]: For 27280/27288 co-relation queries the response was YES. [2024-06-27 20:43:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15254 conditions, 3096 events. 1957/3096 cut-off events. For 27280/27288 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16368 event pairs, 487 based on Foata normal form. 16/3105 useless extension candidates. Maximal degree in co-relation 15215. Up to 2326 conditions per place. [2024-06-27 20:43:19,192 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 69 changer transitions 0/168 dead transitions. [2024-06-27 20:43:19,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 168 transitions, 1743 flow [2024-06-27 20:43:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:43:19,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:43:19,194 INFO L175 Difference]: Start difference. First operand has 91 places, 123 transitions, 1139 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:43:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 168 transitions, 1743 flow [2024-06-27 20:43:19,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 168 transitions, 1579 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:19,228 INFO L231 Difference]: Finished difference. Result has 92 places, 129 transitions, 1214 flow [2024-06-27 20:43:19,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1214, PETRI_PLACES=92, PETRI_TRANSITIONS=129} [2024-06-27 20:43:19,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 20:43:19,229 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 129 transitions, 1214 flow [2024-06-27 20:43:19,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:19,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:19,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:19,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:43:19,229 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:19,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash -957195097, now seen corresponding path program 3 times [2024-06-27 20:43:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902505825] [2024-06-27 20:43:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:21,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902505825] [2024-06-27 20:43:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902505825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:21,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:21,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275659118] [2024-06-27 20:43:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:21,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:21,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 129 transitions, 1214 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) [2024-06-27 20:43:21,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:21,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:21,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:23,336 INFO L124 PetriNetUnfolderBase]: 2001/3164 cut-off events. [2024-06-27 20:43:23,337 INFO L125 PetriNetUnfolderBase]: For 29847/29855 co-relation queries the response was YES. [2024-06-27 20:43:23,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15849 conditions, 3164 events. 2001/3164 cut-off events. For 29847/29855 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16843 event pairs, 469 based on Foata normal form. 12/3162 useless extension candidates. Maximal degree in co-relation 15809. Up to 2364 conditions per place. [2024-06-27 20:43:23,353 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 78 changer transitions 0/179 dead transitions. [2024-06-27 20:43:23,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1868 flow [2024-06-27 20:43:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:43:23,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:43:23,359 INFO L175 Difference]: Start difference. First operand has 92 places, 129 transitions, 1214 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:43:23,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1868 flow [2024-06-27 20:43:23,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 179 transitions, 1686 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:23,418 INFO L231 Difference]: Finished difference. Result has 96 places, 135 transitions, 1289 flow [2024-06-27 20:43:23,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=96, PETRI_TRANSITIONS=135} [2024-06-27 20:43:23,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 20:43:23,419 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 135 transitions, 1289 flow [2024-06-27 20:43:23,420 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) [2024-06-27 20:43:23,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:23,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:23,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:43:23,420 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)] === [2024-06-27 20:43:23,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash 833479523, now seen corresponding path program 4 times [2024-06-27 20:43:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:23,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140505238] [2024-06-27 20:43:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:23,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140505238] [2024-06-27 20:43:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140505238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:26,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928078971] [2024-06-27 20:43:26,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:26,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:26,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 135 transitions, 1289 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) [2024-06-27 20:43:26,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:26,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:26,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:27,859 INFO L124 PetriNetUnfolderBase]: 1985/3114 cut-off events. [2024-06-27 20:43:27,860 INFO L125 PetriNetUnfolderBase]: For 31829/31833 co-relation queries the response was YES. [2024-06-27 20:43:27,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 3114 events. 1985/3114 cut-off events. For 31829/31833 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16306 event pairs, 503 based on Foata normal form. 8/3100 useless extension candidates. Maximal degree in co-relation 15765. Up to 2351 conditions per place. [2024-06-27 20:43:27,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-27 20:43:27,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 170 transitions, 1753 flow [2024-06-27 20:43:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:43:27,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:43:27,882 INFO L175 Difference]: Start difference. First operand has 96 places, 135 transitions, 1289 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:43:27,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 170 transitions, 1753 flow [2024-06-27 20:43:27,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1530 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:43:27,922 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1229 flow [2024-06-27 20:43:27,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1229, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-27 20:43:27,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 20:43:27,923 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1229 flow [2024-06-27 20:43:27,923 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) [2024-06-27 20:43:27,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:27,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:43:27,924 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:27,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash 841108220, now seen corresponding path program 1 times [2024-06-27 20:43:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:27,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900280952] [2024-06-27 20:43:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:30,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900280952] [2024-06-27 20:43:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900280952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:30,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:30,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:30,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199080594] [2024-06-27 20:43:30,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:30,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:30,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:30,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:30,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1229 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) [2024-06-27 20:43:30,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:30,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:31,537 INFO L124 PetriNetUnfolderBase]: 1977/3127 cut-off events. [2024-06-27 20:43:31,537 INFO L125 PetriNetUnfolderBase]: For 33019/33021 co-relation queries the response was YES. [2024-06-27 20:43:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15731 conditions, 3127 events. 1977/3127 cut-off events. For 33019/33021 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16590 event pairs, 567 based on Foata normal form. 4/3128 useless extension candidates. Maximal degree in co-relation 15690. Up to 2867 conditions per place. [2024-06-27 20:43:31,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-27 20:43:31,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1692 flow [2024-06-27 20:43:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:43:31,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:43:31,556 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1229 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:43:31,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1692 flow [2024-06-27 20:43:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1484 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:31,587 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1119 flow [2024-06-27 20:43:31,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=98, PETRI_TRANSITIONS=140} [2024-06-27 20:43:31,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:43:31,588 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1119 flow [2024-06-27 20:43:31,588 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) [2024-06-27 20:43:31,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:31,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:31,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:43:31,589 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:31,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash 254248917, now seen corresponding path program 1 times [2024-06-27 20:43:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:31,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882189193] [2024-06-27 20:43:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:31,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:32,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882189193] [2024-06-27 20:43:32,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882189193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:32,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:32,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:43:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610513915] [2024-06-27 20:43:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:43:32,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:43:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:43:32,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:43:32,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 140 transitions, 1119 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:32,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:32,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:43:32,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:33,570 INFO L124 PetriNetUnfolderBase]: 1840/2950 cut-off events. [2024-06-27 20:43:33,571 INFO L125 PetriNetUnfolderBase]: For 34143/34166 co-relation queries the response was YES. [2024-06-27 20:43:33,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14907 conditions, 2950 events. 1840/2950 cut-off events. For 34143/34166 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16020 event pairs, 532 based on Foata normal form. 12/2943 useless extension candidates. Maximal degree in co-relation 14864. Up to 2657 conditions per place. [2024-06-27 20:43:33,588 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 133 selfloop transitions, 8 changer transitions 0/154 dead transitions. [2024-06-27 20:43:33,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 154 transitions, 1457 flow [2024-06-27 20:43:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:43:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:43:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:43:33,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 20:43:33,591 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1119 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:43:33,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 154 transitions, 1457 flow [2024-06-27 20:43:33,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 1406 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:33,623 INFO L231 Difference]: Finished difference. Result has 98 places, 143 transitions, 1122 flow [2024-06-27 20:43:33,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1122, PETRI_PLACES=98, PETRI_TRANSITIONS=143} [2024-06-27 20:43:33,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:43:33,624 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 143 transitions, 1122 flow [2024-06-27 20:43:33,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:33,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:33,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:33,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:43:33,624 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:33,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1525038529, now seen corresponding path program 1 times [2024-06-27 20:43:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:33,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255240978] [2024-06-27 20:43:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:36,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:36,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255240978] [2024-06-27 20:43:36,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255240978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:36,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:36,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323676468] [2024-06-27 20:43:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:36,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:36,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:36,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 143 transitions, 1122 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:36,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:36,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:37,124 INFO L124 PetriNetUnfolderBase]: 1991/3153 cut-off events. [2024-06-27 20:43:37,125 INFO L125 PetriNetUnfolderBase]: For 36993/37008 co-relation queries the response was YES. [2024-06-27 20:43:37,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16052 conditions, 3153 events. 1991/3153 cut-off events. For 36993/37008 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16872 event pairs, 358 based on Foata normal form. 16/3165 useless extension candidates. Maximal degree in co-relation 16008. Up to 2635 conditions per place. [2024-06-27 20:43:37,149 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-27 20:43:37,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1676 flow [2024-06-27 20:43:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:43:37,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:43:37,152 INFO L175 Difference]: Start difference. First operand has 98 places, 143 transitions, 1122 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:43:37,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1676 flow [2024-06-27 20:43:37,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 179 transitions, 1644 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:37,202 INFO L231 Difference]: Finished difference. Result has 102 places, 147 transitions, 1213 flow [2024-06-27 20:43:37,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=102, PETRI_TRANSITIONS=147} [2024-06-27 20:43:37,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 20:43:37,203 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 147 transitions, 1213 flow [2024-06-27 20:43:37,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:37,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:37,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:37,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:43:37,204 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1527895489, now seen corresponding path program 2 times [2024-06-27 20:43:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:37,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356636653] [2024-06-27 20:43:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:40,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:40,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356636653] [2024-06-27 20:43:40,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356636653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:40,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:40,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:43:40,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588207808] [2024-06-27 20:43:40,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:43:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:43:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:43:40,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:40,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 147 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:40,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:40,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:40,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:41,163 INFO L124 PetriNetUnfolderBase]: 1983/3130 cut-off events. [2024-06-27 20:43:41,163 INFO L125 PetriNetUnfolderBase]: For 40588/40595 co-relation queries the response was YES. [2024-06-27 20:43:41,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 3130 events. 1983/3130 cut-off events. For 40588/40595 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16577 event pairs, 476 based on Foata normal form. 8/3134 useless extension candidates. Maximal degree in co-relation 16347. Up to 2731 conditions per place. [2024-06-27 20:43:41,185 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-27 20:43:41,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 177 transitions, 1647 flow [2024-06-27 20:43:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:43:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:43:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:43:41,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:43:41,206 INFO L175 Difference]: Start difference. First operand has 102 places, 147 transitions, 1213 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:43:41,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 177 transitions, 1647 flow [2024-06-27 20:43:41,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 177 transitions, 1583 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:41,251 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1224 flow [2024-06-27 20:43:41,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1224, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2024-06-27 20:43:41,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 20:43:41,252 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1224 flow [2024-06-27 20:43:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:41,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:41,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:41,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:43:41,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:41,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:41,254 INFO L85 PathProgramCache]: Analyzing trace with hash 31556154, now seen corresponding path program 1 times [2024-06-27 20:43:41,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:41,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384214207] [2024-06-27 20:43:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:41,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:44,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384214207] [2024-06-27 20:43:44,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384214207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:44,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:44,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:44,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775259244] [2024-06-27 20:43:44,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:44,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:44,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:44,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:44,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:44,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:44,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1224 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:44,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:44,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:45,190 INFO L124 PetriNetUnfolderBase]: 2147/3430 cut-off events. [2024-06-27 20:43:45,190 INFO L125 PetriNetUnfolderBase]: For 51110/51115 co-relation queries the response was YES. [2024-06-27 20:43:45,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18102 conditions, 3430 events. 2147/3430 cut-off events. For 51110/51115 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18762 event pairs, 414 based on Foata normal form. 16/3440 useless extension candidates. Maximal degree in co-relation 18055. Up to 1929 conditions per place. [2024-06-27 20:43:45,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 73 changer transitions 0/195 dead transitions. [2024-06-27 20:43:45,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 195 transitions, 1880 flow [2024-06-27 20:43:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:43:45,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:43:45,212 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1224 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:43:45,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 195 transitions, 1880 flow [2024-06-27 20:43:45,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1805 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:45,254 INFO L231 Difference]: Finished difference. Result has 108 places, 149 transitions, 1339 flow [2024-06-27 20:43:45,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1339, PETRI_PLACES=108, PETRI_TRANSITIONS=149} [2024-06-27 20:43:45,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:43:45,255 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 149 transitions, 1339 flow [2024-06-27 20:43:45,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:45,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:45,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:43:45,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:45,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1466238902, now seen corresponding path program 2 times [2024-06-27 20:43:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:45,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395843079] [2024-06-27 20:43:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:45,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:47,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395843079] [2024-06-27 20:43:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395843079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:47,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:47,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980262098] [2024-06-27 20:43:47,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:47,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:48,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:48,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 149 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:48,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:48,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:48,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:49,570 INFO L124 PetriNetUnfolderBase]: 2372/3810 cut-off events. [2024-06-27 20:43:49,571 INFO L125 PetriNetUnfolderBase]: For 59612/59640 co-relation queries the response was YES. [2024-06-27 20:43:49,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20390 conditions, 3810 events. 2372/3810 cut-off events. For 59612/59640 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21599 event pairs, 592 based on Foata normal form. 32/3830 useless extension candidates. Maximal degree in co-relation 20342. Up to 2685 conditions per place. [2024-06-27 20:43:49,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 95 changer transitions 0/213 dead transitions. [2024-06-27 20:43:49,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 213 transitions, 2185 flow [2024-06-27 20:43:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:43:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:43:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:43:49,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:43:49,597 INFO L175 Difference]: Start difference. First operand has 108 places, 149 transitions, 1339 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:43:49,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 213 transitions, 2185 flow [2024-06-27 20:43:49,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 213 transitions, 2082 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:49,657 INFO L231 Difference]: Finished difference. Result has 118 places, 173 transitions, 1834 flow [2024-06-27 20:43:49,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1834, PETRI_PLACES=118, PETRI_TRANSITIONS=173} [2024-06-27 20:43:49,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 20:43:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 173 transitions, 1834 flow [2024-06-27 20:43:49,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:49,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:49,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:49,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:43:49,658 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:49,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash 797162060, now seen corresponding path program 3 times [2024-06-27 20:43:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:49,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044602224] [2024-06-27 20:43:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:49,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:52,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044602224] [2024-06-27 20:43:52,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044602224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:52,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:52,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:52,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140803061] [2024-06-27 20:43:52,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:52,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:53,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:53,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 173 transitions, 1834 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:53,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:53,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:53,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:54,488 INFO L124 PetriNetUnfolderBase]: 2592/4170 cut-off events. [2024-06-27 20:43:54,489 INFO L125 PetriNetUnfolderBase]: For 71802/71807 co-relation queries the response was YES. [2024-06-27 20:43:54,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24011 conditions, 4170 events. 2592/4170 cut-off events. For 71802/71807 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24177 event pairs, 610 based on Foata normal form. 16/4180 useless extension candidates. Maximal degree in co-relation 23956. Up to 2681 conditions per place. [2024-06-27 20:43:54,520 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 101 changer transitions 0/221 dead transitions. [2024-06-27 20:43:54,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 221 transitions, 2570 flow [2024-06-27 20:43:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:43:54,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:43:54,522 INFO L175 Difference]: Start difference. First operand has 118 places, 173 transitions, 1834 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:43:54,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 221 transitions, 2570 flow [2024-06-27 20:43:54,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 221 transitions, 2440 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:54,609 INFO L231 Difference]: Finished difference. Result has 123 places, 176 transitions, 1992 flow [2024-06-27 20:43:54,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1992, PETRI_PLACES=123, PETRI_TRANSITIONS=176} [2024-06-27 20:43:54,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 20:43:54,610 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 176 transitions, 1992 flow [2024-06-27 20:43:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:54,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:54,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:54,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:43:54,611 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:54,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:54,611 INFO L85 PathProgramCache]: Analyzing trace with hash -600819112, now seen corresponding path program 4 times [2024-06-27 20:43:54,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:54,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139034629] [2024-06-27 20:43:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:57,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139034629] [2024-06-27 20:43:57,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139034629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:57,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:57,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:43:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94715023] [2024-06-27 20:43:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:57,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:43:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:43:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:43:57,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:57,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 176 transitions, 1992 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:57,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:57,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:57,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:59,205 INFO L124 PetriNetUnfolderBase]: 2728/4454 cut-off events. [2024-06-27 20:43:59,206 INFO L125 PetriNetUnfolderBase]: For 84515/84530 co-relation queries the response was YES. [2024-06-27 20:43:59,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25860 conditions, 4454 events. 2728/4454 cut-off events. For 84515/84530 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26623 event pairs, 513 based on Foata normal form. 28/4476 useless extension candidates. Maximal degree in co-relation 25802. Up to 2957 conditions per place. [2024-06-27 20:43:59,241 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 100 changer transitions 0/227 dead transitions. [2024-06-27 20:43:59,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 227 transitions, 2752 flow [2024-06-27 20:43:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:43:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:43:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:43:59,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:43:59,243 INFO L175 Difference]: Start difference. First operand has 123 places, 176 transitions, 1992 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:43:59,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 227 transitions, 2752 flow [2024-06-27 20:43:59,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 227 transitions, 2622 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:43:59,359 INFO L231 Difference]: Finished difference. Result has 127 places, 178 transitions, 2118 flow [2024-06-27 20:43:59,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2118, PETRI_PLACES=127, PETRI_TRANSITIONS=178} [2024-06-27 20:43:59,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 20:43:59,360 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 178 transitions, 2118 flow [2024-06-27 20:43:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:59,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:59,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:59,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:43:59,361 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:59,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash -600671242, now seen corresponding path program 5 times [2024-06-27 20:43:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854925118] [2024-06-27 20:43:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:02,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:02,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854925118] [2024-06-27 20:44:02,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854925118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:02,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:02,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318686449] [2024-06-27 20:44:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:02,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:02,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 178 transitions, 2118 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:02,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:02,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:03,958 INFO L124 PetriNetUnfolderBase]: 2816/4594 cut-off events. [2024-06-27 20:44:03,958 INFO L125 PetriNetUnfolderBase]: For 92187/92202 co-relation queries the response was YES. [2024-06-27 20:44:03,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27230 conditions, 4594 events. 2816/4594 cut-off events. For 92187/92202 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27644 event pairs, 647 based on Foata normal form. 32/4620 useless extension candidates. Maximal degree in co-relation 27170. Up to 3453 conditions per place. [2024-06-27 20:44:03,993 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 97 changer transitions 0/224 dead transitions. [2024-06-27 20:44:03,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 224 transitions, 2754 flow [2024-06-27 20:44:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:44:03,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:44:03,995 INFO L175 Difference]: Start difference. First operand has 127 places, 178 transitions, 2118 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:44:03,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 224 transitions, 2754 flow [2024-06-27 20:44:04,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 224 transitions, 2620 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:04,097 INFO L231 Difference]: Finished difference. Result has 131 places, 179 transitions, 2217 flow [2024-06-27 20:44:04,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2217, PETRI_PLACES=131, PETRI_TRANSITIONS=179} [2024-06-27 20:44:04,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-27 20:44:04,098 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 179 transitions, 2217 flow [2024-06-27 20:44:04,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:04,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:04,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:04,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:44:04,098 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:04,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash -970473446, now seen corresponding path program 6 times [2024-06-27 20:44:04,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:04,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055638749] [2024-06-27 20:44:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:04,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055638749] [2024-06-27 20:44:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055638749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392056983] [2024-06-27 20:44:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:07,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:07,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:07,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:07,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 179 transitions, 2217 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) [2024-06-27 20:44:07,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:07,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:07,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:09,592 INFO L124 PetriNetUnfolderBase]: 2904/4726 cut-off events. [2024-06-27 20:44:09,592 INFO L125 PetriNetUnfolderBase]: For 98752/98761 co-relation queries the response was YES. [2024-06-27 20:44:09,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28470 conditions, 4726 events. 2904/4726 cut-off events. For 98752/98761 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28596 event pairs, 676 based on Foata normal form. 24/4744 useless extension candidates. Maximal degree in co-relation 28408. Up to 3601 conditions per place. [2024-06-27 20:44:09,624 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 124 selfloop transitions, 98 changer transitions 0/227 dead transitions. [2024-06-27 20:44:09,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 227 transitions, 2861 flow [2024-06-27 20:44:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:44:09,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:44:09,626 INFO L175 Difference]: Start difference. First operand has 131 places, 179 transitions, 2217 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:44:09,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 227 transitions, 2861 flow [2024-06-27 20:44:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 227 transitions, 2662 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:09,738 INFO L231 Difference]: Finished difference. Result has 134 places, 180 transitions, 2253 flow [2024-06-27 20:44:09,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2253, PETRI_PLACES=134, PETRI_TRANSITIONS=180} [2024-06-27 20:44:09,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 20:44:09,738 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 180 transitions, 2253 flow [2024-06-27 20:44:09,739 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) [2024-06-27 20:44:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:09,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:44:09,739 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:09,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash 110022724, now seen corresponding path program 1 times [2024-06-27 20:44:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697617165] [2024-06-27 20:44:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:09,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:11,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697617165] [2024-06-27 20:44:11,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697617165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:11,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:11,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:11,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105620041] [2024-06-27 20:44:11,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:11,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:11,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:11,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 180 transitions, 2253 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) [2024-06-27 20:44:11,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:13,085 INFO L124 PetriNetUnfolderBase]: 2730/4499 cut-off events. [2024-06-27 20:44:13,085 INFO L125 PetriNetUnfolderBase]: For 98702/98725 co-relation queries the response was YES. [2024-06-27 20:44:13,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27536 conditions, 4499 events. 2730/4499 cut-off events. For 98702/98725 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27788 event pairs, 695 based on Foata normal form. 16/4476 useless extension candidates. Maximal degree in co-relation 27473. Up to 4080 conditions per place. [2024-06-27 20:44:13,125 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 171 selfloop transitions, 18 changer transitions 0/205 dead transitions. [2024-06-27 20:44:13,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 205 transitions, 2749 flow [2024-06-27 20:44:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:44:13,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:44:13,127 INFO L175 Difference]: Start difference. First operand has 134 places, 180 transitions, 2253 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:44:13,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 205 transitions, 2749 flow [2024-06-27 20:44:13,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 205 transitions, 2546 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:13,242 INFO L231 Difference]: Finished difference. Result has 133 places, 185 transitions, 2160 flow [2024-06-27 20:44:13,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2160, PETRI_PLACES=133, PETRI_TRANSITIONS=185} [2024-06-27 20:44:13,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 20:44:13,243 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 185 transitions, 2160 flow [2024-06-27 20:44:13,244 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) [2024-06-27 20:44:13,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:13,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:13,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:44:13,244 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:13,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1115516552, now seen corresponding path program 7 times [2024-06-27 20:44:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:13,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394505906] [2024-06-27 20:44:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:13,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:16,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:16,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394505906] [2024-06-27 20:44:16,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394505906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:16,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:16,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:16,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686529495] [2024-06-27 20:44:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:16,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:16,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:16,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 185 transitions, 2160 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) [2024-06-27 20:44:16,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:16,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:18,634 INFO L124 PetriNetUnfolderBase]: 2980/4858 cut-off events. [2024-06-27 20:44:18,635 INFO L125 PetriNetUnfolderBase]: For 107655/107663 co-relation queries the response was YES. [2024-06-27 20:44:18,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28950 conditions, 4858 events. 2980/4858 cut-off events. For 107655/107663 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29594 event pairs, 646 based on Foata normal form. 26/4867 useless extension candidates. Maximal degree in co-relation 28886. Up to 3751 conditions per place. [2024-06-27 20:44:18,668 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 101 changer transitions 0/237 dead transitions. [2024-06-27 20:44:18,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 237 transitions, 2856 flow [2024-06-27 20:44:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:44:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:44:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:44:18,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:44:18,670 INFO L175 Difference]: Start difference. First operand has 133 places, 185 transitions, 2160 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:44:18,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 237 transitions, 2856 flow [2024-06-27 20:44:18,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 237 transitions, 2796 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:18,779 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 2341 flow [2024-06-27 20:44:18,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2341, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-27 20:44:18,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 20:44:18,784 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 2341 flow [2024-06-27 20:44:18,784 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) [2024-06-27 20:44:18,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:18,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:18,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:44:18,785 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:18,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2109963970, now seen corresponding path program 8 times [2024-06-27 20:44:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:18,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804071982] [2024-06-27 20:44:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:21,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804071982] [2024-06-27 20:44:21,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804071982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:21,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:21,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814971225] [2024-06-27 20:44:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:21,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:21,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:21,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:21,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:21,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:21,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 2341 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) [2024-06-27 20:44:21,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:21,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:21,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:23,739 INFO L124 PetriNetUnfolderBase]: 2944/4773 cut-off events. [2024-06-27 20:44:23,740 INFO L125 PetriNetUnfolderBase]: For 109482/109486 co-relation queries the response was YES. [2024-06-27 20:44:23,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28906 conditions, 4773 events. 2944/4773 cut-off events. For 109482/109486 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28857 event pairs, 670 based on Foata normal form. 22/4768 useless extension candidates. Maximal degree in co-relation 28841. Up to 3695 conditions per place. [2024-06-27 20:44:23,778 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 98 changer transitions 0/230 dead transitions. [2024-06-27 20:44:23,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 230 transitions, 2971 flow [2024-06-27 20:44:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:44:23,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:44:23,780 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 2341 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:44:23,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 230 transitions, 2971 flow [2024-06-27 20:44:23,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 230 transitions, 2750 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:23,909 INFO L231 Difference]: Finished difference. Result has 140 places, 186 transitions, 2325 flow [2024-06-27 20:44:23,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2325, PETRI_PLACES=140, PETRI_TRANSITIONS=186} [2024-06-27 20:44:23,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 20:44:23,910 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 186 transitions, 2325 flow [2024-06-27 20:44:23,911 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) [2024-06-27 20:44:23,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:23,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:23,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:44:23,911 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:23,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 244752477, now seen corresponding path program 1 times [2024-06-27 20:44:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:23,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262979283] [2024-06-27 20:44:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:27,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262979283] [2024-06-27 20:44:27,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262979283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:27,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:27,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:27,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275759994] [2024-06-27 20:44:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:27,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:27,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:27,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:27,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:27,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 186 transitions, 2325 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) [2024-06-27 20:44:27,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:27,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:27,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:29,214 INFO L124 PetriNetUnfolderBase]: 2964/4786 cut-off events. [2024-06-27 20:44:29,214 INFO L125 PetriNetUnfolderBase]: For 108427/108431 co-relation queries the response was YES. [2024-06-27 20:44:29,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29078 conditions, 4786 events. 2964/4786 cut-off events. For 108427/108431 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28874 event pairs, 674 based on Foata normal form. 6/4761 useless extension candidates. Maximal degree in co-relation 29012. Up to 3859 conditions per place. [2024-06-27 20:44:29,254 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 103 changer transitions 0/230 dead transitions. [2024-06-27 20:44:29,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 230 transitions, 3007 flow [2024-06-27 20:44:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:44:29,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:44:29,256 INFO L175 Difference]: Start difference. First operand has 140 places, 186 transitions, 2325 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:44:29,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 230 transitions, 3007 flow [2024-06-27 20:44:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 230 transitions, 2769 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:29,385 INFO L231 Difference]: Finished difference. Result has 142 places, 192 transitions, 2408 flow [2024-06-27 20:44:29,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2408, PETRI_PLACES=142, PETRI_TRANSITIONS=192} [2024-06-27 20:44:29,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 20:44:29,386 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 192 transitions, 2408 flow [2024-06-27 20:44:29,386 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) [2024-06-27 20:44:29,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:29,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:29,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:44:29,386 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:29,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1122881873, now seen corresponding path program 2 times [2024-06-27 20:44:29,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641247195] [2024-06-27 20:44:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641247195] [2024-06-27 20:44:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641247195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:32,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:32,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:32,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895723244] [2024-06-27 20:44:32,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:32,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:32,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:32,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 192 transitions, 2408 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) [2024-06-27 20:44:32,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:32,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:32,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:34,452 INFO L124 PetriNetUnfolderBase]: 3006/4871 cut-off events. [2024-06-27 20:44:34,453 INFO L125 PetriNetUnfolderBase]: For 116467/116475 co-relation queries the response was YES. [2024-06-27 20:44:34,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29993 conditions, 4871 events. 3006/4871 cut-off events. For 116467/116475 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29546 event pairs, 666 based on Foata normal form. 10/4854 useless extension candidates. Maximal degree in co-relation 29925. Up to 3905 conditions per place. [2024-06-27 20:44:34,490 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 126 changer transitions 0/252 dead transitions. [2024-06-27 20:44:34,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 252 transitions, 3371 flow [2024-06-27 20:44:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:44:34,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:44:34,491 INFO L175 Difference]: Start difference. First operand has 142 places, 192 transitions, 2408 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:44:34,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 252 transitions, 3371 flow [2024-06-27 20:44:34,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 252 transitions, 3083 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:34,623 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2755 flow [2024-06-27 20:44:34,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2755, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2024-06-27 20:44:34,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 20:44:34,624 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2755 flow [2024-06-27 20:44:34,624 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) [2024-06-27 20:44:34,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:34,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:34,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:44:34,625 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:34,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash 851204219, now seen corresponding path program 3 times [2024-06-27 20:44:34,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:34,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273197301] [2024-06-27 20:44:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:34,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:38,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273197301] [2024-06-27 20:44:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273197301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:38,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656162942] [2024-06-27 20:44:38,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:38,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:38,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:38,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2755 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) [2024-06-27 20:44:38,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:38,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:38,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:40,269 INFO L124 PetriNetUnfolderBase]: 3114/5077 cut-off events. [2024-06-27 20:44:40,269 INFO L125 PetriNetUnfolderBase]: For 128303/128311 co-relation queries the response was YES. [2024-06-27 20:44:40,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31631 conditions, 5077 events. 3114/5077 cut-off events. For 128303/128311 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31334 event pairs, 620 based on Foata normal form. 10/5058 useless extension candidates. Maximal degree in co-relation 31561. Up to 3651 conditions per place. [2024-06-27 20:44:40,311 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 137 changer transitions 0/264 dead transitions. [2024-06-27 20:44:40,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 264 transitions, 3671 flow [2024-06-27 20:44:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:44:40,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:44:40,313 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2755 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:44:40,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 264 transitions, 3671 flow [2024-06-27 20:44:40,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 264 transitions, 3420 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:40,473 INFO L231 Difference]: Finished difference. Result has 152 places, 220 transitions, 2960 flow [2024-06-27 20:44:40,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2960, PETRI_PLACES=152, PETRI_TRANSITIONS=220} [2024-06-27 20:44:40,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 20:44:40,474 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 220 transitions, 2960 flow [2024-06-27 20:44:40,474 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) [2024-06-27 20:44:40,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:40,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:40,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:44:40,475 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:40,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 585180509, now seen corresponding path program 4 times [2024-06-27 20:44:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313140125] [2024-06-27 20:44:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:40,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:43,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:43,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313140125] [2024-06-27 20:44:43,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313140125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:43,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:43,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:43,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415348034] [2024-06-27 20:44:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:43,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:43,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:43,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:43,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:43,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 220 transitions, 2960 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) [2024-06-27 20:44:43,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:43,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:43,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:45,769 INFO L124 PetriNetUnfolderBase]: 3106/5060 cut-off events. [2024-06-27 20:44:45,769 INFO L125 PetriNetUnfolderBase]: For 132593/132601 co-relation queries the response was YES. [2024-06-27 20:44:45,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31440 conditions, 5060 events. 3106/5060 cut-off events. For 132593/132601 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31165 event pairs, 704 based on Foata normal form. 10/5039 useless extension candidates. Maximal degree in co-relation 31368. Up to 4081 conditions per place. [2024-06-27 20:44:45,808 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 125 changer transitions 0/258 dead transitions. [2024-06-27 20:44:45,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 258 transitions, 3597 flow [2024-06-27 20:44:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:44:45,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:44:45,810 INFO L175 Difference]: Start difference. First operand has 152 places, 220 transitions, 2960 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:44:45,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 258 transitions, 3597 flow [2024-06-27 20:44:45,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 258 transitions, 3299 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:46,000 INFO L231 Difference]: Finished difference. Result has 156 places, 221 transitions, 2944 flow [2024-06-27 20:44:46,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2944, PETRI_PLACES=156, PETRI_TRANSITIONS=221} [2024-06-27 20:44:46,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 20:44:46,000 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 221 transitions, 2944 flow [2024-06-27 20:44:46,001 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) [2024-06-27 20:44:46,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:46,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:46,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:44:46,001 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:46,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash -479891308, now seen corresponding path program 2 times [2024-06-27 20:44:46,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:46,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623764170] [2024-06-27 20:44:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:46,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623764170] [2024-06-27 20:44:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623764170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:47,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:47,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515258586] [2024-06-27 20:44:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:47,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:47,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 221 transitions, 2944 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) [2024-06-27 20:44:47,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:47,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:47,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:49,348 INFO L124 PetriNetUnfolderBase]: 2938/4929 cut-off events. [2024-06-27 20:44:49,349 INFO L125 PetriNetUnfolderBase]: For 137020/137067 co-relation queries the response was YES. [2024-06-27 20:44:49,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30449 conditions, 4929 events. 2938/4929 cut-off events. For 137020/137067 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31694 event pairs, 668 based on Foata normal form. 31/4919 useless extension candidates. Maximal degree in co-relation 30375. Up to 4422 conditions per place. [2024-06-27 20:44:49,389 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 200 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2024-06-27 20:44:49,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 238 transitions, 3478 flow [2024-06-27 20:44:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:44:49,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:44:49,390 INFO L175 Difference]: Start difference. First operand has 156 places, 221 transitions, 2944 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:44:49,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 238 transitions, 3478 flow [2024-06-27 20:44:49,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 238 transitions, 3192 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:49,563 INFO L231 Difference]: Finished difference. Result has 156 places, 224 transitions, 2758 flow [2024-06-27 20:44:49,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2758, PETRI_PLACES=156, PETRI_TRANSITIONS=224} [2024-06-27 20:44:49,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 20:44:49,564 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 224 transitions, 2758 flow [2024-06-27 20:44:49,564 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) [2024-06-27 20:44:49,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:49,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:49,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:44:49,565 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:49,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 90511288, now seen corresponding path program 9 times [2024-06-27 20:44:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:49,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796587957] [2024-06-27 20:44:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:51,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796587957] [2024-06-27 20:44:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796587957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:51,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:51,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798826963] [2024-06-27 20:44:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:51,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:51,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:51,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 224 transitions, 2758 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:51,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:51,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:51,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:54,036 INFO L124 PetriNetUnfolderBase]: 3332/5435 cut-off events. [2024-06-27 20:44:54,037 INFO L125 PetriNetUnfolderBase]: For 172113/172128 co-relation queries the response was YES. [2024-06-27 20:44:54,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31676 conditions, 5435 events. 3332/5435 cut-off events. For 172113/172128 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34125 event pairs, 689 based on Foata normal form. 92/5515 useless extension candidates. Maximal degree in co-relation 31601. Up to 3501 conditions per place. [2024-06-27 20:44:54,083 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 168 selfloop transitions, 135 changer transitions 2/310 dead transitions. [2024-06-27 20:44:54,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 310 transitions, 4105 flow [2024-06-27 20:44:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:44:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:44:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-27 20:44:54,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-27 20:44:54,085 INFO L175 Difference]: Start difference. First operand has 156 places, 224 transitions, 2758 flow. Second operand 13 states and 246 transitions. [2024-06-27 20:44:54,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 310 transitions, 4105 flow [2024-06-27 20:44:54,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 310 transitions, 4007 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:54,308 INFO L231 Difference]: Finished difference. Result has 165 places, 225 transitions, 2969 flow [2024-06-27 20:44:54,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2969, PETRI_PLACES=165, PETRI_TRANSITIONS=225} [2024-06-27 20:44:54,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 20:44:54,309 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 225 transitions, 2969 flow [2024-06-27 20:44:54,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:54,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:54,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:54,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:44:54,309 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:54,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1398757366, now seen corresponding path program 1 times [2024-06-27 20:44:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:54,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899019047] [2024-06-27 20:44:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:54,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:55,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:55,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899019047] [2024-06-27 20:44:55,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899019047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:55,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:55,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:55,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348659107] [2024-06-27 20:44:55,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:55,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:55,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 225 transitions, 2969 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:55,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:55,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:55,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:57,248 INFO L124 PetriNetUnfolderBase]: 3298/5445 cut-off events. [2024-06-27 20:44:57,248 INFO L125 PetriNetUnfolderBase]: For 140592/140594 co-relation queries the response was YES. [2024-06-27 20:44:57,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32716 conditions, 5445 events. 3298/5445 cut-off events. For 140592/140594 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34399 event pairs, 1014 based on Foata normal form. 2/5444 useless extension candidates. Maximal degree in co-relation 32640. Up to 5087 conditions per place. [2024-06-27 20:44:57,297 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 227 selfloop transitions, 17 changer transitions 0/249 dead transitions. [2024-06-27 20:44:57,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 249 transitions, 3633 flow [2024-06-27 20:44:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:44:57,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:44:57,299 INFO L175 Difference]: Start difference. First operand has 165 places, 225 transitions, 2969 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:44:57,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 249 transitions, 3633 flow [2024-06-27 20:44:57,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 249 transitions, 3354 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 20:44:57,531 INFO L231 Difference]: Finished difference. Result has 160 places, 231 transitions, 2796 flow [2024-06-27 20:44:57,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2796, PETRI_PLACES=160, PETRI_TRANSITIONS=231} [2024-06-27 20:44:57,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:44:57,532 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 231 transitions, 2796 flow [2024-06-27 20:44:57,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:57,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:57,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:57,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:44:57,533 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:57,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 178793654, now seen corresponding path program 2 times [2024-06-27 20:44:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:57,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238233161] [2024-06-27 20:44:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:57,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:58,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:58,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238233161] [2024-06-27 20:44:58,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238233161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:58,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:58,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406627516] [2024-06-27 20:44:58,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:58,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:58,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:58,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 231 transitions, 2796 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:58,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:58,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:58,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:00,336 INFO L124 PetriNetUnfolderBase]: 3292/5426 cut-off events. [2024-06-27 20:45:00,337 INFO L125 PetriNetUnfolderBase]: For 140948/140953 co-relation queries the response was YES. [2024-06-27 20:45:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31841 conditions, 5426 events. 3292/5426 cut-off events. For 140948/140953 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34171 event pairs, 1013 based on Foata normal form. 4/5426 useless extension candidates. Maximal degree in co-relation 31764. Up to 5082 conditions per place. [2024-06-27 20:45:00,383 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 221 selfloop transitions, 17 changer transitions 0/243 dead transitions. [2024-06-27 20:45:00,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 243 transitions, 3302 flow [2024-06-27 20:45:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:45:00,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:45:00,385 INFO L175 Difference]: Start difference. First operand has 160 places, 231 transitions, 2796 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:45:00,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 243 transitions, 3302 flow [2024-06-27 20:45:00,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 243 transitions, 3251 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 20:45:00,578 INFO L231 Difference]: Finished difference. Result has 164 places, 231 transitions, 2785 flow [2024-06-27 20:45:00,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2785, PETRI_PLACES=164, PETRI_TRANSITIONS=231} [2024-06-27 20:45:00,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 20:45:00,579 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 231 transitions, 2785 flow [2024-06-27 20:45:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:00,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:00,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:00,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:45:00,580 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:00,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash -479876428, now seen corresponding path program 1 times [2024-06-27 20:45:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082346077] [2024-06-27 20:45:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082346077] [2024-06-27 20:45:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082346077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:02,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:02,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363276795] [2024-06-27 20:45:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:02,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:02,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 231 transitions, 2785 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) [2024-06-27 20:45:02,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:02,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:02,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:04,129 INFO L124 PetriNetUnfolderBase]: 3136/5195 cut-off events. [2024-06-27 20:45:04,130 INFO L125 PetriNetUnfolderBase]: For 147735/147787 co-relation queries the response was YES. [2024-06-27 20:45:04,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30798 conditions, 5195 events. 3136/5195 cut-off events. For 147735/147787 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 33212 event pairs, 956 based on Foata normal form. 37/5182 useless extension candidates. Maximal degree in co-relation 30719. Up to 4780 conditions per place. [2024-06-27 20:45:04,179 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 216 selfloop transitions, 11 changer transitions 0/245 dead transitions. [2024-06-27 20:45:04,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 245 transitions, 3299 flow [2024-06-27 20:45:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:45:04,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:45:04,181 INFO L175 Difference]: Start difference. First operand has 164 places, 231 transitions, 2785 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:45:04,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 245 transitions, 3299 flow [2024-06-27 20:45:04,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 245 transitions, 3246 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:04,393 INFO L231 Difference]: Finished difference. Result has 164 places, 233 transitions, 2793 flow [2024-06-27 20:45:04,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2793, PETRI_PLACES=164, PETRI_TRANSITIONS=233} [2024-06-27 20:45:04,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 20:45:04,394 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 233 transitions, 2793 flow [2024-06-27 20:45:04,394 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) [2024-06-27 20:45:04,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:04,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:45:04,394 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:04,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -884589977, now seen corresponding path program 1 times [2024-06-27 20:45:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:04,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868042603] [2024-06-27 20:45:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:06,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868042603] [2024-06-27 20:45:06,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868042603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:06,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:06,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:06,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770650570] [2024-06-27 20:45:06,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:06,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:06,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:06,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:06,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 233 transitions, 2793 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) [2024-06-27 20:45:06,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:06,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:06,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:08,590 INFO L124 PetriNetUnfolderBase]: 3359/5542 cut-off events. [2024-06-27 20:45:08,591 INFO L125 PetriNetUnfolderBase]: For 157791/157820 co-relation queries the response was YES. [2024-06-27 20:45:08,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32700 conditions, 5542 events. 3359/5542 cut-off events. For 157791/157820 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35201 event pairs, 703 based on Foata normal form. 36/5574 useless extension candidates. Maximal degree in co-relation 32621. Up to 4818 conditions per place. [2024-06-27 20:45:08,631 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 68 changer transitions 0/287 dead transitions. [2024-06-27 20:45:08,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 287 transitions, 3815 flow [2024-06-27 20:45:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:45:08,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:45:08,643 INFO L175 Difference]: Start difference. First operand has 164 places, 233 transitions, 2793 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:45:08,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 287 transitions, 3815 flow [2024-06-27 20:45:08,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 287 transitions, 3770 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:08,855 INFO L231 Difference]: Finished difference. Result has 170 places, 252 transitions, 3138 flow [2024-06-27 20:45:08,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3138, PETRI_PLACES=170, PETRI_TRANSITIONS=252} [2024-06-27 20:45:08,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 20:45:08,856 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 252 transitions, 3138 flow [2024-06-27 20:45:08,856 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) [2024-06-27 20:45:08,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:08,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:08,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:45:08,857 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:08,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1754615756, now seen corresponding path program 1 times [2024-06-27 20:45:08,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:08,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952123173] [2024-06-27 20:45:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952123173] [2024-06-27 20:45:13,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952123173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:13,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:13,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:13,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122199928] [2024-06-27 20:45:13,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:13,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:13,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:13,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:13,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:13,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 252 transitions, 3138 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:13,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:13,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:13,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:15,886 INFO L124 PetriNetUnfolderBase]: 3455/5722 cut-off events. [2024-06-27 20:45:15,887 INFO L125 PetriNetUnfolderBase]: For 170346/170355 co-relation queries the response was YES. [2024-06-27 20:45:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34300 conditions, 5722 events. 3455/5722 cut-off events. For 170346/170355 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36702 event pairs, 762 based on Foata normal form. 16/5732 useless extension candidates. Maximal degree in co-relation 34219. Up to 4136 conditions per place. [2024-06-27 20:45:15,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 129 changer transitions 0/325 dead transitions. [2024-06-27 20:45:15,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 325 transitions, 4129 flow [2024-06-27 20:45:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-27 20:45:15,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:45:15,941 INFO L175 Difference]: Start difference. First operand has 170 places, 252 transitions, 3138 flow. Second operand 12 states and 219 transitions. [2024-06-27 20:45:15,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 325 transitions, 4129 flow [2024-06-27 20:45:16,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 325 transitions, 4006 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:16,209 INFO L231 Difference]: Finished difference. Result has 180 places, 261 transitions, 3456 flow [2024-06-27 20:45:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3456, PETRI_PLACES=180, PETRI_TRANSITIONS=261} [2024-06-27 20:45:16,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:45:16,210 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 261 transitions, 3456 flow [2024-06-27 20:45:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:16,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:16,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:45:16,211 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:16,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash -884261687, now seen corresponding path program 2 times [2024-06-27 20:45:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797172537] [2024-06-27 20:45:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797172537] [2024-06-27 20:45:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797172537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:18,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273171226] [2024-06-27 20:45:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:18,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:18,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 261 transitions, 3456 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) [2024-06-27 20:45:18,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:18,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:20,196 INFO L124 PetriNetUnfolderBase]: 3439/5719 cut-off events. [2024-06-27 20:45:20,196 INFO L125 PetriNetUnfolderBase]: For 172655/172670 co-relation queries the response was YES. [2024-06-27 20:45:20,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34871 conditions, 5719 events. 3439/5719 cut-off events. For 172655/172670 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36980 event pairs, 760 based on Foata normal form. 20/5735 useless extension candidates. Maximal degree in co-relation 34786. Up to 4980 conditions per place. [2024-06-27 20:45:20,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 58 changer transitions 0/283 dead transitions. [2024-06-27 20:45:20,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 283 transitions, 4152 flow [2024-06-27 20:45:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:45:20,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:45:20,249 INFO L175 Difference]: Start difference. First operand has 180 places, 261 transitions, 3456 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:45:20,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 283 transitions, 4152 flow [2024-06-27 20:45:20,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 3819 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-27 20:45:20,550 INFO L231 Difference]: Finished difference. Result has 177 places, 261 transitions, 3251 flow [2024-06-27 20:45:20,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3251, PETRI_PLACES=177, PETRI_TRANSITIONS=261} [2024-06-27 20:45:20,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 20:45:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 261 transitions, 3251 flow [2024-06-27 20:45:20,552 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) [2024-06-27 20:45:20,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:20,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:45:20,552 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1108197090, now seen corresponding path program 2 times [2024-06-27 20:45:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:20,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102358937] [2024-06-27 20:45:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:20,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:24,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102358937] [2024-06-27 20:45:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102358937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:24,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:24,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972116366] [2024-06-27 20:45:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:24,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 261 transitions, 3251 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:24,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:24,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:24,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:26,727 INFO L124 PetriNetUnfolderBase]: 3535/5861 cut-off events. [2024-06-27 20:45:26,727 INFO L125 PetriNetUnfolderBase]: For 180878/180882 co-relation queries the response was YES. [2024-06-27 20:45:26,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34921 conditions, 5861 events. 3535/5861 cut-off events. For 180878/180882 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37968 event pairs, 833 based on Foata normal form. 14/5848 useless extension candidates. Maximal degree in co-relation 34838. Up to 4600 conditions per place. [2024-06-27 20:45:26,793 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 133 changer transitions 0/325 dead transitions. [2024-06-27 20:45:26,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 325 transitions, 4198 flow [2024-06-27 20:45:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-27 20:45:26,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:45:26,797 INFO L175 Difference]: Start difference. First operand has 177 places, 261 transitions, 3251 flow. Second operand 12 states and 216 transitions. [2024-06-27 20:45:26,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 325 transitions, 4198 flow [2024-06-27 20:45:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 325 transitions, 4082 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:27,083 INFO L231 Difference]: Finished difference. Result has 185 places, 268 transitions, 3545 flow [2024-06-27 20:45:27,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3135, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3545, PETRI_PLACES=185, PETRI_TRANSITIONS=268} [2024-06-27 20:45:27,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 20:45:27,083 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 268 transitions, 3545 flow [2024-06-27 20:45:27,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:27,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:27,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:27,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:45:27,084 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:27,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 960728420, now seen corresponding path program 3 times [2024-06-27 20:45:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559519835] [2024-06-27 20:45:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:30,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559519835] [2024-06-27 20:45:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559519835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:30,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988635710] [2024-06-27 20:45:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:30,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:30,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:30,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 268 transitions, 3545 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:30,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:30,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:30,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:33,135 INFO L124 PetriNetUnfolderBase]: 3673/6159 cut-off events. [2024-06-27 20:45:33,136 INFO L125 PetriNetUnfolderBase]: For 193024/193032 co-relation queries the response was YES. [2024-06-27 20:45:33,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36886 conditions, 6159 events. 3673/6159 cut-off events. For 193024/193032 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40815 event pairs, 823 based on Foata normal form. 18/6160 useless extension candidates. Maximal degree in co-relation 36800. Up to 4824 conditions per place. [2024-06-27 20:45:33,192 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 194 selfloop transitions, 142 changer transitions 0/341 dead transitions. [2024-06-27 20:45:33,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 341 transitions, 4594 flow [2024-06-27 20:45:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:45:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:45:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-27 20:45:33,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:45:33,194 INFO L175 Difference]: Start difference. First operand has 185 places, 268 transitions, 3545 flow. Second operand 13 states and 234 transitions. [2024-06-27 20:45:33,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 341 transitions, 4594 flow [2024-06-27 20:45:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 341 transitions, 4291 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:33,489 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3717 flow [2024-06-27 20:45:33,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3717, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-27 20:45:33,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 20:45:33,490 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3717 flow [2024-06-27 20:45:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:33,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:33,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:33,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:45:33,491 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:33,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash 322309638, now seen corresponding path program 4 times [2024-06-27 20:45:33,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:33,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874191577] [2024-06-27 20:45:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:33,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:37,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874191577] [2024-06-27 20:45:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874191577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:37,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586236352] [2024-06-27 20:45:37,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:37,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:37,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3717 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:37,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:37,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:37,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:40,155 INFO L124 PetriNetUnfolderBase]: 3701/6211 cut-off events. [2024-06-27 20:45:40,155 INFO L125 PetriNetUnfolderBase]: For 192046/192054 co-relation queries the response was YES. [2024-06-27 20:45:40,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36895 conditions, 6211 events. 3701/6211 cut-off events. For 192046/192054 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 41297 event pairs, 821 based on Foata normal form. 18/6212 useless extension candidates. Maximal degree in co-relation 36806. Up to 4876 conditions per place. [2024-06-27 20:45:40,215 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 193 selfloop transitions, 150 changer transitions 0/348 dead transitions. [2024-06-27 20:45:40,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 348 transitions, 4712 flow [2024-06-27 20:45:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:45:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:45:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-27 20:45:40,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-27 20:45:40,217 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3717 flow. Second operand 13 states and 232 transitions. [2024-06-27 20:45:40,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 348 transitions, 4712 flow [2024-06-27 20:45:40,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 348 transitions, 4391 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 20:45:40,591 INFO L231 Difference]: Finished difference. Result has 197 places, 282 transitions, 3796 flow [2024-06-27 20:45:40,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3796, PETRI_PLACES=197, PETRI_TRANSITIONS=282} [2024-06-27 20:45:40,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 20:45:40,592 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 282 transitions, 3796 flow [2024-06-27 20:45:40,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:40,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:40,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:45:40,592 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:40,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash 617528838, now seen corresponding path program 5 times [2024-06-27 20:45:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585303712] [2024-06-27 20:45:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:44,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585303712] [2024-06-27 20:45:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585303712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:44,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:44,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:45:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575018985] [2024-06-27 20:45:44,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:44,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:45:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:45:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:45:44,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:44,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 282 transitions, 3796 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:44,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:44,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:44,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:46,950 INFO L124 PetriNetUnfolderBase]: 3681/6179 cut-off events. [2024-06-27 20:45:46,951 INFO L125 PetriNetUnfolderBase]: For 188032/188040 co-relation queries the response was YES. [2024-06-27 20:45:46,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36405 conditions, 6179 events. 3681/6179 cut-off events. For 188032/188040 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 40929 event pairs, 727 based on Foata normal form. 18/6180 useless extension candidates. Maximal degree in co-relation 36314. Up to 3704 conditions per place. [2024-06-27 20:45:47,004 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 163 changer transitions 0/344 dead transitions. [2024-06-27 20:45:47,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 344 transitions, 4684 flow [2024-06-27 20:45:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:45:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:45:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-27 20:45:47,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 20:45:47,009 INFO L175 Difference]: Start difference. First operand has 197 places, 282 transitions, 3796 flow. Second operand 12 states and 217 transitions. [2024-06-27 20:45:47,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 344 transitions, 4684 flow [2024-06-27 20:45:47,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 344 transitions, 4122 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-27 20:45:47,369 INFO L231 Difference]: Finished difference. Result has 198 places, 282 transitions, 3566 flow [2024-06-27 20:45:47,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3566, PETRI_PLACES=198, PETRI_TRANSITIONS=282} [2024-06-27 20:45:47,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 20:45:47,372 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 282 transitions, 3566 flow [2024-06-27 20:45:47,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:45:47,372 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1991727495, now seen corresponding path program 3 times [2024-06-27 20:45:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:47,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055409482] [2024-06-27 20:45:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:49,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055409482] [2024-06-27 20:45:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055409482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:49,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096556308] [2024-06-27 20:45:49,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:49,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:49,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:49,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 282 transitions, 3566 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) [2024-06-27 20:45:49,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:49,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:49,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:51,644 INFO L124 PetriNetUnfolderBase]: 3689/6196 cut-off events. [2024-06-27 20:45:51,644 INFO L125 PetriNetUnfolderBase]: For 185203/185244 co-relation queries the response was YES. [2024-06-27 20:45:51,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35297 conditions, 6196 events. 3689/6196 cut-off events. For 185203/185244 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 41245 event pairs, 845 based on Foata normal form. 23/6197 useless extension candidates. Maximal degree in co-relation 35207. Up to 5335 conditions per place. [2024-06-27 20:45:51,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 68 changer transitions 0/307 dead transitions. [2024-06-27 20:45:51,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 307 transitions, 4504 flow [2024-06-27 20:45:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:45:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:45:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:45:51,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:45:51,702 INFO L175 Difference]: Start difference. First operand has 198 places, 282 transitions, 3566 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:45:51,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 307 transitions, 4504 flow [2024-06-27 20:45:52,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 307 transitions, 4084 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 20:45:52,071 INFO L231 Difference]: Finished difference. Result has 195 places, 290 transitions, 3420 flow [2024-06-27 20:45:52,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3420, PETRI_PLACES=195, PETRI_TRANSITIONS=290} [2024-06-27 20:45:52,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 20:45:52,072 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 290 transitions, 3420 flow [2024-06-27 20:45:52,072 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) [2024-06-27 20:45:52,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:52,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:52,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:45:52,073 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:52,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash 547239640, now seen corresponding path program 1 times [2024-06-27 20:45:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:52,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427562454] [2024-06-27 20:45:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:54,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:54,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427562454] [2024-06-27 20:45:54,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427562454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:54,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:54,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074506236] [2024-06-27 20:45:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:54,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:54,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:54,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:54,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 290 transitions, 3420 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:54,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:54,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:54,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:56,803 INFO L124 PetriNetUnfolderBase]: 3703/6191 cut-off events. [2024-06-27 20:45:56,804 INFO L125 PetriNetUnfolderBase]: For 188551/188570 co-relation queries the response was YES. [2024-06-27 20:45:56,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34365 conditions, 6191 events. 3703/6191 cut-off events. For 188551/188570 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41214 event pairs, 764 based on Foata normal form. 28/6213 useless extension candidates. Maximal degree in co-relation 34274. Up to 4774 conditions per place. [2024-06-27 20:45:56,867 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 219 selfloop transitions, 139 changer transitions 1/364 dead transitions. [2024-06-27 20:45:56,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 364 transitions, 4487 flow [2024-06-27 20:45:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:45:56,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 20:45:56,875 INFO L175 Difference]: Start difference. First operand has 195 places, 290 transitions, 3420 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:45:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 364 transitions, 4487 flow [2024-06-27 20:45:57,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 364 transitions, 4325 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 20:45:57,198 INFO L231 Difference]: Finished difference. Result has 202 places, 294 transitions, 3560 flow [2024-06-27 20:45:57,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3560, PETRI_PLACES=202, PETRI_TRANSITIONS=294} [2024-06-27 20:45:57,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 20:45:57,199 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 294 transitions, 3560 flow [2024-06-27 20:45:57,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:57,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:57,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:45:57,200 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)] === [2024-06-27 20:45:57,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash 122982217, now seen corresponding path program 1 times [2024-06-27 20:45:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345398126] [2024-06-27 20:45:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345398126] [2024-06-27 20:45:58,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345398126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:58,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:58,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:45:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100344699] [2024-06-27 20:45:58,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:58,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:45:58,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:45:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:45:59,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:59,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 294 transitions, 3560 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) [2024-06-27 20:45:59,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:59,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:59,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:00,764 INFO L124 PetriNetUnfolderBase]: 3713/6238 cut-off events. [2024-06-27 20:46:00,765 INFO L125 PetriNetUnfolderBase]: For 189520/189522 co-relation queries the response was YES. [2024-06-27 20:46:00,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35189 conditions, 6238 events. 3713/6238 cut-off events. For 189520/189522 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 41574 event pairs, 1130 based on Foata normal form. 2/6237 useless extension candidates. Maximal degree in co-relation 35095. Up to 5763 conditions per place. [2024-06-27 20:46:00,815 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 25 changer transitions 0/324 dead transitions. [2024-06-27 20:46:00,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 324 transitions, 4442 flow [2024-06-27 20:46:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:46:00,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:46:00,817 INFO L175 Difference]: Start difference. First operand has 202 places, 294 transitions, 3560 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:46:00,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 324 transitions, 4442 flow [2024-06-27 20:46:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 324 transitions, 4243 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:01,161 INFO L231 Difference]: Finished difference. Result has 202 places, 300 transitions, 3511 flow [2024-06-27 20:46:01,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3511, PETRI_PLACES=202, PETRI_TRANSITIONS=300} [2024-06-27 20:46:01,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 20:46:01,161 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 300 transitions, 3511 flow [2024-06-27 20:46:01,161 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) [2024-06-27 20:46:01,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:01,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:46:01,162 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:01,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1018640639, now seen corresponding path program 2 times [2024-06-27 20:46:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:01,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84888135] [2024-06-27 20:46:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:02,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84888135] [2024-06-27 20:46:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84888135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424059986] [2024-06-27 20:46:02,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:02,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:03,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:03,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 300 transitions, 3511 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) [2024-06-27 20:46:03,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:03,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:04,770 INFO L124 PetriNetUnfolderBase]: 3723/6264 cut-off events. [2024-06-27 20:46:04,771 INFO L125 PetriNetUnfolderBase]: For 193935/193937 co-relation queries the response was YES. [2024-06-27 20:46:04,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35517 conditions, 6264 events. 3723/6264 cut-off events. For 193935/193937 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 41956 event pairs, 1130 based on Foata normal form. 2/6263 useless extension candidates. Maximal degree in co-relation 35421. Up to 5773 conditions per place. [2024-06-27 20:46:04,839 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 291 selfloop transitions, 27 changer transitions 0/323 dead transitions. [2024-06-27 20:46:04,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 323 transitions, 4343 flow [2024-06-27 20:46:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:46:04,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:46:04,856 INFO L175 Difference]: Start difference. First operand has 202 places, 300 transitions, 3511 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:46:04,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 323 transitions, 4343 flow [2024-06-27 20:46:05,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 323 transitions, 4254 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:46:05,263 INFO L231 Difference]: Finished difference. Result has 206 places, 303 transitions, 3532 flow [2024-06-27 20:46:05,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3532, PETRI_PLACES=206, PETRI_TRANSITIONS=303} [2024-06-27 20:46:05,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 20:46:05,264 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 303 transitions, 3532 flow [2024-06-27 20:46:05,264 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) [2024-06-27 20:46:05,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:05,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:05,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:46:05,264 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:05,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:05,265 INFO L85 PathProgramCache]: Analyzing trace with hash -156422817, now seen corresponding path program 3 times [2024-06-27 20:46:05,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:05,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614710514] [2024-06-27 20:46:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614710514] [2024-06-27 20:46:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614710514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:07,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:07,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109675294] [2024-06-27 20:46:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:07,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:07,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:07,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 303 transitions, 3532 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) [2024-06-27 20:46:07,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:07,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:07,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:09,161 INFO L124 PetriNetUnfolderBase]: 3717/6258 cut-off events. [2024-06-27 20:46:09,161 INFO L125 PetriNetUnfolderBase]: For 198194/198199 co-relation queries the response was YES. [2024-06-27 20:46:09,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35479 conditions, 6258 events. 3717/6258 cut-off events. For 198194/198199 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 41891 event pairs, 1132 based on Foata normal form. 4/6257 useless extension candidates. Maximal degree in co-relation 35381. Up to 5768 conditions per place. [2024-06-27 20:46:09,218 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 285 selfloop transitions, 27 changer transitions 0/317 dead transitions. [2024-06-27 20:46:09,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 317 transitions, 4190 flow [2024-06-27 20:46:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:46:09,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 20:46:09,221 INFO L175 Difference]: Start difference. First operand has 206 places, 303 transitions, 3532 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:46:09,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 317 transitions, 4190 flow [2024-06-27 20:46:09,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 317 transitions, 4114 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:09,652 INFO L231 Difference]: Finished difference. Result has 209 places, 303 transitions, 3516 flow [2024-06-27 20:46:09,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=209, PETRI_TRANSITIONS=303} [2024-06-27 20:46:09,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-27 20:46:09,655 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 303 transitions, 3516 flow [2024-06-27 20:46:09,656 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) [2024-06-27 20:46:09,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:09,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:46:09,656 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)] === [2024-06-27 20:46:09,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash 477255069, now seen corresponding path program 1 times [2024-06-27 20:46:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618256536] [2024-06-27 20:46:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:12,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:12,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618256536] [2024-06-27 20:46:12,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618256536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:12,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:12,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78728532] [2024-06-27 20:46:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:12,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:12,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:12,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 303 transitions, 3516 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) [2024-06-27 20:46:12,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:12,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:12,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:13,954 INFO L124 PetriNetUnfolderBase]: 3777/6322 cut-off events. [2024-06-27 20:46:13,954 INFO L125 PetriNetUnfolderBase]: For 217397/217404 co-relation queries the response was YES. [2024-06-27 20:46:13,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36132 conditions, 6322 events. 3777/6322 cut-off events. For 217397/217404 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42215 event pairs, 820 based on Foata normal form. 16/6334 useless extension candidates. Maximal degree in co-relation 36033. Up to 5500 conditions per place. [2024-06-27 20:46:14,013 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 81 changer transitions 0/346 dead transitions. [2024-06-27 20:46:14,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 346 transitions, 4640 flow [2024-06-27 20:46:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:46:14,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:46:14,015 INFO L175 Difference]: Start difference. First operand has 209 places, 303 transitions, 3516 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:46:14,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 346 transitions, 4640 flow [2024-06-27 20:46:14,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 346 transitions, 4560 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:14,412 INFO L231 Difference]: Finished difference. Result has 211 places, 315 transitions, 3772 flow [2024-06-27 20:46:14,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3772, PETRI_PLACES=211, PETRI_TRANSITIONS=315} [2024-06-27 20:46:14,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 20:46:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 315 transitions, 3772 flow [2024-06-27 20:46:14,413 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) [2024-06-27 20:46:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:46:14,414 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)] === [2024-06-27 20:46:14,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1642303357, now seen corresponding path program 2 times [2024-06-27 20:46:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295749267] [2024-06-27 20:46:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295749267] [2024-06-27 20:46:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295749267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:16,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:16,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839197068] [2024-06-27 20:46:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:16,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 315 transitions, 3772 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) [2024-06-27 20:46:16,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:16,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:18,228 INFO L124 PetriNetUnfolderBase]: 3729/6268 cut-off events. [2024-06-27 20:46:18,228 INFO L125 PetriNetUnfolderBase]: For 210087/210102 co-relation queries the response was YES. [2024-06-27 20:46:18,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35951 conditions, 6268 events. 3729/6268 cut-off events. For 210087/210102 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41975 event pairs, 820 based on Foata normal form. 20/6284 useless extension candidates. Maximal degree in co-relation 35851. Up to 5444 conditions per place. [2024-06-27 20:46:18,291 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 70 changer transitions 0/337 dead transitions. [2024-06-27 20:46:18,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 337 transitions, 4598 flow [2024-06-27 20:46:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:46:18,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:46:18,293 INFO L175 Difference]: Start difference. First operand has 211 places, 315 transitions, 3772 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:46:18,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 337 transitions, 4598 flow [2024-06-27 20:46:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 337 transitions, 4439 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:18,723 INFO L231 Difference]: Finished difference. Result has 213 places, 315 transitions, 3769 flow [2024-06-27 20:46:18,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3769, PETRI_PLACES=213, PETRI_TRANSITIONS=315} [2024-06-27 20:46:18,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 20:46:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 315 transitions, 3769 flow [2024-06-27 20:46:18,724 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) [2024-06-27 20:46:18,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:18,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:18,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:46:18,725 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)] === [2024-06-27 20:46:18,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1642294429, now seen corresponding path program 1 times [2024-06-27 20:46:18,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476358686] [2024-06-27 20:46:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476358686] [2024-06-27 20:46:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476358686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:21,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:21,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:21,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770140882] [2024-06-27 20:46:21,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:21,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:21,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:21,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:21,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:21,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 315 transitions, 3769 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) [2024-06-27 20:46:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:23,117 INFO L124 PetriNetUnfolderBase]: 3579/6068 cut-off events. [2024-06-27 20:46:23,117 INFO L125 PetriNetUnfolderBase]: For 212447/212481 co-relation queries the response was YES. [2024-06-27 20:46:23,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34968 conditions, 6068 events. 3579/6068 cut-off events. For 212447/212481 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41200 event pairs, 810 based on Foata normal form. 21/6042 useless extension candidates. Maximal degree in co-relation 34867. Up to 5443 conditions per place. [2024-06-27 20:46:23,183 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 293 selfloop transitions, 20 changer transitions 0/339 dead transitions. [2024-06-27 20:46:23,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 339 transitions, 4517 flow [2024-06-27 20:46:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:46:23,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:46:23,184 INFO L175 Difference]: Start difference. First operand has 213 places, 315 transitions, 3769 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:46:23,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 339 transitions, 4517 flow [2024-06-27 20:46:23,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 339 transitions, 4377 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:23,657 INFO L231 Difference]: Finished difference. Result has 214 places, 317 transitions, 3733 flow [2024-06-27 20:46:23,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3733, PETRI_PLACES=214, PETRI_TRANSITIONS=317} [2024-06-27 20:46:23,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 20:46:23,658 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 317 transitions, 3733 flow [2024-06-27 20:46:23,658 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) [2024-06-27 20:46:23,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:23,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:23,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:46:23,658 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)] === [2024-06-27 20:46:23,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1969211249, now seen corresponding path program 3 times [2024-06-27 20:46:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54444203] [2024-06-27 20:46:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54444203] [2024-06-27 20:46:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54444203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:26,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:26,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565936723] [2024-06-27 20:46:26,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:26,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:26,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 317 transitions, 3733 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) [2024-06-27 20:46:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:26,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:27,479 INFO L124 PetriNetUnfolderBase]: 3717/6235 cut-off events. [2024-06-27 20:46:27,479 INFO L125 PetriNetUnfolderBase]: For 213184/213190 co-relation queries the response was YES. [2024-06-27 20:46:27,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35618 conditions, 6235 events. 3717/6235 cut-off events. For 213184/213190 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41537 event pairs, 826 based on Foata normal form. 8/6226 useless extension candidates. Maximal degree in co-relation 35516. Up to 5614 conditions per place. [2024-06-27 20:46:27,539 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 46 changer transitions 0/339 dead transitions. [2024-06-27 20:46:27,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 339 transitions, 4469 flow [2024-06-27 20:46:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:46:27,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 20:46:27,541 INFO L175 Difference]: Start difference. First operand has 214 places, 317 transitions, 3733 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:46:27,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 339 transitions, 4469 flow [2024-06-27 20:46:27,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 339 transitions, 4365 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:27,989 INFO L231 Difference]: Finished difference. Result has 216 places, 317 transitions, 3729 flow [2024-06-27 20:46:27,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3729, PETRI_PLACES=216, PETRI_TRANSITIONS=317} [2024-06-27 20:46:27,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 20:46:27,990 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 317 transitions, 3729 flow [2024-06-27 20:46:27,990 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) [2024-06-27 20:46:27,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:27,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:46:27,991 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)] === [2024-06-27 20:46:27,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash 655991591, now seen corresponding path program 4 times [2024-06-27 20:46:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:27,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281420858] [2024-06-27 20:46:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:30,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281420858] [2024-06-27 20:46:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281420858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683224329] [2024-06-27 20:46:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:30,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:30,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:30,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 317 transitions, 3729 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) [2024-06-27 20:46:30,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:30,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:30,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:31,912 INFO L124 PetriNetUnfolderBase]: 3727/6243 cut-off events. [2024-06-27 20:46:31,913 INFO L125 PetriNetUnfolderBase]: For 216532/216540 co-relation queries the response was YES. [2024-06-27 20:46:31,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35857 conditions, 6243 events. 3727/6243 cut-off events. For 216532/216540 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41536 event pairs, 819 based on Foata normal form. 8/6234 useless extension candidates. Maximal degree in co-relation 35754. Up to 5369 conditions per place. [2024-06-27 20:46:31,975 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 94 changer transitions 0/342 dead transitions. [2024-06-27 20:46:31,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 342 transitions, 4613 flow [2024-06-27 20:46:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:46:31,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:46:31,976 INFO L175 Difference]: Start difference. First operand has 216 places, 317 transitions, 3729 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:46:31,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 342 transitions, 4613 flow [2024-06-27 20:46:32,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 342 transitions, 4448 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:32,355 INFO L231 Difference]: Finished difference. Result has 216 places, 320 transitions, 3798 flow [2024-06-27 20:46:32,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3798, PETRI_PLACES=216, PETRI_TRANSITIONS=320} [2024-06-27 20:46:32,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 20:46:32,356 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 320 transitions, 3798 flow [2024-06-27 20:46:32,356 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) [2024-06-27 20:46:32,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:32,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:32,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:46:32,357 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:32,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash 465335061, now seen corresponding path program 5 times [2024-06-27 20:46:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:32,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420241791] [2024-06-27 20:46:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:32,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:34,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:34,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420241791] [2024-06-27 20:46:34,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420241791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:34,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623711481] [2024-06-27 20:46:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:34,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:34,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:34,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 320 transitions, 3798 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) [2024-06-27 20:46:34,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:34,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:34,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:36,361 INFO L124 PetriNetUnfolderBase]: 3737/6278 cut-off events. [2024-06-27 20:46:36,361 INFO L125 PetriNetUnfolderBase]: For 224110/224151 co-relation queries the response was YES. [2024-06-27 20:46:36,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36274 conditions, 6278 events. 3737/6278 cut-off events. For 224110/224151 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41897 event pairs, 836 based on Foata normal form. 21/6277 useless extension candidates. Maximal degree in co-relation 36170. Up to 5375 conditions per place. [2024-06-27 20:46:36,426 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 89 changer transitions 0/339 dead transitions. [2024-06-27 20:46:36,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 339 transitions, 4664 flow [2024-06-27 20:46:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:46:36,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:46:36,427 INFO L175 Difference]: Start difference. First operand has 216 places, 320 transitions, 3798 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:46:36,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 339 transitions, 4664 flow [2024-06-27 20:46:36,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 339 transitions, 4503 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:36,961 INFO L231 Difference]: Finished difference. Result has 219 places, 323 transitions, 3867 flow [2024-06-27 20:46:36,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3867, PETRI_PLACES=219, PETRI_TRANSITIONS=323} [2024-06-27 20:46:36,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 20:46:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 323 transitions, 3867 flow [2024-06-27 20:46:36,962 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) [2024-06-27 20:46:36,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:36,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:46:36,963 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:36,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1614005037, now seen corresponding path program 6 times [2024-06-27 20:46:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992015669] [2024-06-27 20:46:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:39,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:39,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992015669] [2024-06-27 20:46:39,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992015669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:39,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:39,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378649277] [2024-06-27 20:46:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:39,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:39,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:39,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 323 transitions, 3867 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) [2024-06-27 20:46:39,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:39,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:39,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:41,187 INFO L124 PetriNetUnfolderBase]: 3721/6254 cut-off events. [2024-06-27 20:46:41,188 INFO L125 PetriNetUnfolderBase]: For 228149/228190 co-relation queries the response was YES. [2024-06-27 20:46:41,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36030 conditions, 6254 events. 3721/6254 cut-off events. For 228149/228190 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41730 event pairs, 837 based on Foata normal form. 23/6255 useless extension candidates. Maximal degree in co-relation 35925. Up to 5362 conditions per place. [2024-06-27 20:46:41,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 81 changer transitions 0/338 dead transitions. [2024-06-27 20:46:41,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 4573 flow [2024-06-27 20:46:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:46:41,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:46:41,261 INFO L175 Difference]: Start difference. First operand has 219 places, 323 transitions, 3867 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:46:41,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 4573 flow [2024-06-27 20:46:41,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 338 transitions, 4322 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:41,753 INFO L231 Difference]: Finished difference. Result has 221 places, 323 transitions, 3786 flow [2024-06-27 20:46:41,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3786, PETRI_PLACES=221, PETRI_TRANSITIONS=323} [2024-06-27 20:46:41,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 20:46:41,754 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 323 transitions, 3786 flow [2024-06-27 20:46:41,754 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) [2024-06-27 20:46:41,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:41,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:41,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:46:41,755 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:41,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1600186539, now seen corresponding path program 2 times [2024-06-27 20:46:41,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:41,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957956801] [2024-06-27 20:46:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:45,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:45,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957956801] [2024-06-27 20:46:45,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957956801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:45,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:45,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402147901] [2024-06-27 20:46:45,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:45,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:45,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:45,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:45,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 323 transitions, 3786 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) [2024-06-27 20:46:45,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:45,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:45,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:46,610 INFO L124 PetriNetUnfolderBase]: 3574/6074 cut-off events. [2024-06-27 20:46:46,611 INFO L125 PetriNetUnfolderBase]: For 233635/233675 co-relation queries the response was YES. [2024-06-27 20:46:46,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35114 conditions, 6074 events. 3574/6074 cut-off events. For 233635/233675 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41274 event pairs, 784 based on Foata normal form. 24/6053 useless extension candidates. Maximal degree in co-relation 35008. Up to 5427 conditions per place. [2024-06-27 20:46:46,679 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 289 selfloop transitions, 24 changer transitions 0/341 dead transitions. [2024-06-27 20:46:46,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 341 transitions, 4520 flow [2024-06-27 20:46:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:46:46,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 20:46:46,680 INFO L175 Difference]: Start difference. First operand has 221 places, 323 transitions, 3786 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:46:46,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 341 transitions, 4520 flow [2024-06-27 20:46:47,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 341 transitions, 4324 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:47,225 INFO L231 Difference]: Finished difference. Result has 221 places, 325 transitions, 3705 flow [2024-06-27 20:46:47,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3705, PETRI_PLACES=221, PETRI_TRANSITIONS=325} [2024-06-27 20:46:47,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 20:46:47,226 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 325 transitions, 3705 flow [2024-06-27 20:46:47,226 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) [2024-06-27 20:46:47,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:47,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:47,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:46:47,226 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:47,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1599711309, now seen corresponding path program 3 times [2024-06-27 20:46:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:47,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065995624] [2024-06-27 20:46:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:50,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065995624] [2024-06-27 20:46:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065995624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:50,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:50,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945452285] [2024-06-27 20:46:50,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:50,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:50,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 325 transitions, 3705 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) [2024-06-27 20:46:50,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:50,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:50,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:51,742 INFO L124 PetriNetUnfolderBase]: 3569/6067 cut-off events. [2024-06-27 20:46:51,742 INFO L125 PetriNetUnfolderBase]: For 237873/237913 co-relation queries the response was YES. [2024-06-27 20:46:51,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34854 conditions, 6067 events. 3569/6067 cut-off events. For 237873/237913 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41208 event pairs, 783 based on Foata normal form. 24/6046 useless extension candidates. Maximal degree in co-relation 34747. Up to 5398 conditions per place. [2024-06-27 20:46:51,801 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 286 selfloop transitions, 29 changer transitions 0/343 dead transitions. [2024-06-27 20:46:51,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 343 transitions, 4447 flow [2024-06-27 20:46:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:46:51,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 20:46:51,802 INFO L175 Difference]: Start difference. First operand has 221 places, 325 transitions, 3705 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:46:51,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 343 transitions, 4447 flow [2024-06-27 20:46:52,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 343 transitions, 4348 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:52,254 INFO L231 Difference]: Finished difference. Result has 223 places, 327 transitions, 3735 flow [2024-06-27 20:46:52,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3735, PETRI_PLACES=223, PETRI_TRANSITIONS=327} [2024-06-27 20:46:52,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 20:46:52,255 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 327 transitions, 3735 flow [2024-06-27 20:46:52,255 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) [2024-06-27 20:46:52,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:52,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:46:52,256 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:52,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash 324397031, now seen corresponding path program 1 times [2024-06-27 20:46:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:52,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603780810] [2024-06-27 20:46:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:54,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:54,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603780810] [2024-06-27 20:46:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603780810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:54,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:54,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:54,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397019961] [2024-06-27 20:46:54,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:54,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:54,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:54,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:54,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 327 transitions, 3735 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) [2024-06-27 20:46:54,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:54,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:56,831 INFO L124 PetriNetUnfolderBase]: 3734/6279 cut-off events. [2024-06-27 20:46:56,832 INFO L125 PetriNetUnfolderBase]: For 243415/243417 co-relation queries the response was YES. [2024-06-27 20:46:56,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36073 conditions, 6279 events. 3734/6279 cut-off events. For 243415/243417 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42063 event pairs, 1146 based on Foata normal form. 2/6278 useless extension candidates. Maximal degree in co-relation 35965. Up to 5814 conditions per place. [2024-06-27 20:46:56,891 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 18 changer transitions 0/355 dead transitions. [2024-06-27 20:46:56,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 355 transitions, 4539 flow [2024-06-27 20:46:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:46:56,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:46:56,893 INFO L175 Difference]: Start difference. First operand has 223 places, 327 transitions, 3735 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:46:56,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 355 transitions, 4539 flow [2024-06-27 20:46:57,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 355 transitions, 4426 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:57,409 INFO L231 Difference]: Finished difference. Result has 226 places, 330 transitions, 3706 flow [2024-06-27 20:46:57,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3706, PETRI_PLACES=226, PETRI_TRANSITIONS=330} [2024-06-27 20:46:57,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 20:46:57,411 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 330 transitions, 3706 flow [2024-06-27 20:46:57,411 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) [2024-06-27 20:46:57,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:57,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:57,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:46:57,412 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:57,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash 324517001, now seen corresponding path program 2 times [2024-06-27 20:46:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:57,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329222189] [2024-06-27 20:46:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:57,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329222189] [2024-06-27 20:46:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329222189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:59,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:59,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:59,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058642852] [2024-06-27 20:46:59,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:59,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:59,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:59,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:59,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 330 transitions, 3706 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) [2024-06-27 20:46:59,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:59,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:59,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:01,758 INFO L124 PetriNetUnfolderBase]: 3744/6297 cut-off events. [2024-06-27 20:47:01,758 INFO L125 PetriNetUnfolderBase]: For 249962/249964 co-relation queries the response was YES. [2024-06-27 20:47:01,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36531 conditions, 6297 events. 3744/6297 cut-off events. For 249962/249964 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42166 event pairs, 1125 based on Foata normal form. 2/6296 useless extension candidates. Maximal degree in co-relation 36422. Up to 5763 conditions per place. [2024-06-27 20:47:01,819 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 37 changer transitions 0/362 dead transitions. [2024-06-27 20:47:01,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 362 transitions, 4690 flow [2024-06-27 20:47:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:47:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:47:01,821 INFO L175 Difference]: Start difference. First operand has 226 places, 330 transitions, 3706 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:47:01,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 362 transitions, 4690 flow [2024-06-27 20:47:02,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 362 transitions, 4628 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:02,409 INFO L231 Difference]: Finished difference. Result has 228 places, 336 transitions, 3814 flow [2024-06-27 20:47:02,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3814, PETRI_PLACES=228, PETRI_TRANSITIONS=336} [2024-06-27 20:47:02,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 20:47:02,410 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 336 transitions, 3814 flow [2024-06-27 20:47:02,410 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) [2024-06-27 20:47:02,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:02,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:02,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:47:02,410 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:02,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 329165575, now seen corresponding path program 1 times [2024-06-27 20:47:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:02,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756483653] [2024-06-27 20:47:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:02,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:05,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:05,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756483653] [2024-06-27 20:47:05,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756483653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:05,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:05,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114397128] [2024-06-27 20:47:05,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:05,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:05,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:05,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:05,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:05,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 336 transitions, 3814 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) [2024-06-27 20:47:05,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:05,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:05,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:06,838 INFO L124 PetriNetUnfolderBase]: 3752/6309 cut-off events. [2024-06-27 20:47:06,838 INFO L125 PetriNetUnfolderBase]: For 259189/259191 co-relation queries the response was YES. [2024-06-27 20:47:06,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37155 conditions, 6309 events. 3752/6309 cut-off events. For 259189/259191 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42269 event pairs, 1132 based on Foata normal form. 2/6308 useless extension candidates. Maximal degree in co-relation 37045. Up to 5842 conditions per place. [2024-06-27 20:47:06,899 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 333 selfloop transitions, 19 changer transitions 0/357 dead transitions. [2024-06-27 20:47:06,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 357 transitions, 4602 flow [2024-06-27 20:47:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:47:06,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:47:06,901 INFO L175 Difference]: Start difference. First operand has 228 places, 336 transitions, 3814 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:47:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 357 transitions, 4602 flow [2024-06-27 20:47:07,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 357 transitions, 4533 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:07,454 INFO L231 Difference]: Finished difference. Result has 231 places, 338 transitions, 3828 flow [2024-06-27 20:47:07,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3828, PETRI_PLACES=231, PETRI_TRANSITIONS=338} [2024-06-27 20:47:07,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 20:47:07,469 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 338 transitions, 3828 flow [2024-06-27 20:47:07,469 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) [2024-06-27 20:47:07,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:07,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:07,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:47:07,470 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:07,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash 329158631, now seen corresponding path program 3 times [2024-06-27 20:47:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:07,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210828569] [2024-06-27 20:47:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:07,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:10,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210828569] [2024-06-27 20:47:10,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210828569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:10,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:10,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538718833] [2024-06-27 20:47:10,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:10,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:10,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:10,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:10,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:10,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 338 transitions, 3828 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) [2024-06-27 20:47:10,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:10,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:10,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:12,131 INFO L124 PetriNetUnfolderBase]: 3762/6327 cut-off events. [2024-06-27 20:47:12,132 INFO L125 PetriNetUnfolderBase]: For 266981/266983 co-relation queries the response was YES. [2024-06-27 20:47:12,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37443 conditions, 6327 events. 3762/6327 cut-off events. For 266981/266983 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 42391 event pairs, 1127 based on Foata normal form. 2/6326 useless extension candidates. Maximal degree in co-relation 37331. Up to 5785 conditions per place. [2024-06-27 20:47:12,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 39 changer transitions 0/363 dead transitions. [2024-06-27 20:47:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 363 transitions, 4764 flow [2024-06-27 20:47:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:47:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:47:12,195 INFO L175 Difference]: Start difference. First operand has 231 places, 338 transitions, 3828 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:47:12,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 363 transitions, 4764 flow [2024-06-27 20:47:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 363 transitions, 4697 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:12,737 INFO L231 Difference]: Finished difference. Result has 234 places, 341 transitions, 3887 flow [2024-06-27 20:47:12,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3887, PETRI_PLACES=234, PETRI_TRANSITIONS=341} [2024-06-27 20:47:12,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 20:47:12,738 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 341 transitions, 3887 flow [2024-06-27 20:47:12,739 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) [2024-06-27 20:47:12,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:12,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:47:12,739 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:47:12,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash 465580581, now seen corresponding path program 2 times [2024-06-27 20:47:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:12,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667275099] [2024-06-27 20:47:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:15,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:15,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667275099] [2024-06-27 20:47:15,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667275099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:15,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:15,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647241450] [2024-06-27 20:47:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:15,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:15,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 341 transitions, 3887 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) [2024-06-27 20:47:15,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:15,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:15,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:17,002 INFO L124 PetriNetUnfolderBase]: 3770/6340 cut-off events. [2024-06-27 20:47:17,002 INFO L125 PetriNetUnfolderBase]: For 274764/274769 co-relation queries the response was YES. [2024-06-27 20:47:17,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37678 conditions, 6340 events. 3770/6340 cut-off events. For 274764/274769 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42502 event pairs, 1132 based on Foata normal form. 4/6340 useless extension candidates. Maximal degree in co-relation 37565. Up to 5868 conditions per place. [2024-06-27 20:47:17,070 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 333 selfloop transitions, 19 changer transitions 0/357 dead transitions. [2024-06-27 20:47:17,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 357 transitions, 4665 flow [2024-06-27 20:47:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:47:17,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 20:47:17,077 INFO L175 Difference]: Start difference. First operand has 234 places, 341 transitions, 3887 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:47:17,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 357 transitions, 4665 flow [2024-06-27 20:47:17,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 357 transitions, 4577 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:17,829 INFO L231 Difference]: Finished difference. Result has 236 places, 343 transitions, 3886 flow [2024-06-27 20:47:17,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3886, PETRI_PLACES=236, PETRI_TRANSITIONS=343} [2024-06-27 20:47:17,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-27 20:47:17,831 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 343 transitions, 3886 flow [2024-06-27 20:47:17,831 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) [2024-06-27 20:47:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:17,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:47:17,832 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)] === [2024-06-27 20:47:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1608283181, now seen corresponding path program 4 times [2024-06-27 20:47:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347611896] [2024-06-27 20:47:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:20,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:20,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347611896] [2024-06-27 20:47:20,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347611896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:20,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:20,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:20,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146868405] [2024-06-27 20:47:20,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:20,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:20,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:20,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:20,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:20,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:20,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 343 transitions, 3886 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) [2024-06-27 20:47:20,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:20,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:20,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:22,441 INFO L124 PetriNetUnfolderBase]: 3764/6332 cut-off events. [2024-06-27 20:47:22,441 INFO L125 PetriNetUnfolderBase]: For 278696/278701 co-relation queries the response was YES. [2024-06-27 20:47:22,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37604 conditions, 6332 events. 3764/6332 cut-off events. For 278696/278701 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42460 event pairs, 1140 based on Foata normal form. 2/6328 useless extension candidates. Maximal degree in co-relation 37490. Up to 5792 conditions per place. [2024-06-27 20:47:22,541 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 39 changer transitions 0/359 dead transitions. [2024-06-27 20:47:22,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 359 transitions, 4632 flow [2024-06-27 20:47:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:47:22,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 20:47:22,543 INFO L175 Difference]: Start difference. First operand has 236 places, 343 transitions, 3886 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:47:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 359 transitions, 4632 flow [2024-06-27 20:47:23,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 359 transitions, 4543 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:23,627 INFO L231 Difference]: Finished difference. Result has 239 places, 343 transitions, 3881 flow [2024-06-27 20:47:23,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3881, PETRI_PLACES=239, PETRI_TRANSITIONS=343} [2024-06-27 20:47:23,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:47:23,628 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 343 transitions, 3881 flow [2024-06-27 20:47:23,628 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) [2024-06-27 20:47:23,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:23,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:23,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:47:23,629 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)] === [2024-06-27 20:47:23,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1599705357, now seen corresponding path program 3 times [2024-06-27 20:47:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:23,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553442865] [2024-06-27 20:47:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:23,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:26,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553442865] [2024-06-27 20:47:26,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553442865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:26,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:26,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400495868] [2024-06-27 20:47:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:26,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:26,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:26,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:26,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:26,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 343 transitions, 3881 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) [2024-06-27 20:47:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:26,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:27,818 INFO L124 PetriNetUnfolderBase]: 3759/6325 cut-off events. [2024-06-27 20:47:27,818 INFO L125 PetriNetUnfolderBase]: For 281624/281629 co-relation queries the response was YES. [2024-06-27 20:47:27,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37513 conditions, 6325 events. 3759/6325 cut-off events. For 281624/281629 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42378 event pairs, 1129 based on Foata normal form. 4/6325 useless extension candidates. Maximal degree in co-relation 37398. Up to 5833 conditions per place. [2024-06-27 20:47:27,877 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 330 selfloop transitions, 24 changer transitions 0/359 dead transitions. [2024-06-27 20:47:27,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 359 transitions, 4667 flow [2024-06-27 20:47:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:47:27,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 20:47:27,882 INFO L175 Difference]: Start difference. First operand has 239 places, 343 transitions, 3881 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:47:27,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 359 transitions, 4667 flow [2024-06-27 20:47:28,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 359 transitions, 4547 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:28,588 INFO L231 Difference]: Finished difference. Result has 238 places, 345 transitions, 3862 flow [2024-06-27 20:47:28,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3761, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3862, PETRI_PLACES=238, PETRI_TRANSITIONS=345} [2024-06-27 20:47:28,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-27 20:47:28,588 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 345 transitions, 3862 flow [2024-06-27 20:47:28,588 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) [2024-06-27 20:47:28,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:28,589 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] [2024-06-27 20:47:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:47:28,593 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)] === [2024-06-27 20:47:28,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 303071814, now seen corresponding path program 1 times [2024-06-27 20:47:28,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:28,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157564953] [2024-06-27 20:47:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:31,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157564953] [2024-06-27 20:47:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157564953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:31,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116658725] [2024-06-27 20:47:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:31,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:31,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:31,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:31,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 345 transitions, 3862 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) [2024-06-27 20:47:31,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:31,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:31,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:33,412 INFO L124 PetriNetUnfolderBase]: 3933/6575 cut-off events. [2024-06-27 20:47:33,412 INFO L125 PetriNetUnfolderBase]: For 368246/368273 co-relation queries the response was YES. [2024-06-27 20:47:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40758 conditions, 6575 events. 3933/6575 cut-off events. For 368246/368273 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43954 event pairs, 712 based on Foata normal form. 42/6613 useless extension candidates. Maximal degree in co-relation 40642. Up to 5456 conditions per place. [2024-06-27 20:47:33,477 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 87 changer transitions 0/396 dead transitions. [2024-06-27 20:47:33,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 396 transitions, 5050 flow [2024-06-27 20:47:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:47:33,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:47:33,478 INFO L175 Difference]: Start difference. First operand has 238 places, 345 transitions, 3862 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:47:33,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 396 transitions, 5050 flow [2024-06-27 20:47:34,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 396 transitions, 4965 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:34,224 INFO L231 Difference]: Finished difference. Result has 243 places, 349 transitions, 4064 flow [2024-06-27 20:47:34,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4064, PETRI_PLACES=243, PETRI_TRANSITIONS=349} [2024-06-27 20:47:34,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 20:47:34,225 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 349 transitions, 4064 flow [2024-06-27 20:47:34,225 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) [2024-06-27 20:47:34,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:34,225 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] [2024-06-27 20:47:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:47:34,225 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)] === [2024-06-27 20:47:34,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash 312595014, now seen corresponding path program 2 times [2024-06-27 20:47:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:34,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832312504] [2024-06-27 20:47:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:37,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:37,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832312504] [2024-06-27 20:47:37,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832312504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:37,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:37,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530685750] [2024-06-27 20:47:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:37,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:37,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 349 transitions, 4064 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) [2024-06-27 20:47:37,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:37,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:37,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:39,246 INFO L124 PetriNetUnfolderBase]: 4005/6717 cut-off events. [2024-06-27 20:47:39,246 INFO L125 PetriNetUnfolderBase]: For 391354/391381 co-relation queries the response was YES. [2024-06-27 20:47:39,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42285 conditions, 6717 events. 4005/6717 cut-off events. For 391354/391381 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45316 event pairs, 858 based on Foata normal form. 46/6759 useless extension candidates. Maximal degree in co-relation 42168. Up to 5784 conditions per place. [2024-06-27 20:47:39,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 303 selfloop transitions, 82 changer transitions 0/390 dead transitions. [2024-06-27 20:47:39,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 390 transitions, 5024 flow [2024-06-27 20:47:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:47:39,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:47:39,314 INFO L175 Difference]: Start difference. First operand has 243 places, 349 transitions, 4064 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:47:39,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 390 transitions, 5024 flow [2024-06-27 20:47:39,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 390 transitions, 4854 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:39,978 INFO L231 Difference]: Finished difference. Result has 247 places, 351 transitions, 4126 flow [2024-06-27 20:47:39,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4126, PETRI_PLACES=247, PETRI_TRANSITIONS=351} [2024-06-27 20:47:39,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:47:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 351 transitions, 4126 flow [2024-06-27 20:47:39,979 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) [2024-06-27 20:47:39,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:39,979 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] [2024-06-27 20:47:39,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:47:39,979 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)] === [2024-06-27 20:47:39,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2055170520, now seen corresponding path program 3 times [2024-06-27 20:47:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:39,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16588139] [2024-06-27 20:47:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16588139] [2024-06-27 20:47:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16588139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:43,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:43,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:43,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436212788] [2024-06-27 20:47:43,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:43,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:43,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 351 transitions, 4126 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) [2024-06-27 20:47:43,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:43,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:43,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:44,702 INFO L124 PetriNetUnfolderBase]: 3959/6640 cut-off events. [2024-06-27 20:47:44,702 INFO L125 PetriNetUnfolderBase]: For 352289/352304 co-relation queries the response was YES. [2024-06-27 20:47:44,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40548 conditions, 6640 events. 3959/6640 cut-off events. For 352289/352304 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 44757 event pairs, 861 based on Foata normal form. 32/6668 useless extension candidates. Maximal degree in co-relation 40429. Up to 5718 conditions per place. [2024-06-27 20:47:44,775 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 301 selfloop transitions, 72 changer transitions 0/378 dead transitions. [2024-06-27 20:47:44,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 378 transitions, 4964 flow [2024-06-27 20:47:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:47:44,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:47:44,776 INFO L175 Difference]: Start difference. First operand has 247 places, 351 transitions, 4126 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:47:44,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 378 transitions, 4964 flow [2024-06-27 20:47:45,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 378 transitions, 4752 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:45,435 INFO L231 Difference]: Finished difference. Result has 247 places, 351 transitions, 4066 flow [2024-06-27 20:47:45,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4066, PETRI_PLACES=247, PETRI_TRANSITIONS=351} [2024-06-27 20:47:45,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:47:45,436 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 351 transitions, 4066 flow [2024-06-27 20:47:45,436 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) [2024-06-27 20:47:45,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:45,436 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] [2024-06-27 20:47:45,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:47:45,436 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)] === [2024-06-27 20:47:45,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1848490482, now seen corresponding path program 1 times [2024-06-27 20:47:45,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:45,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174206634] [2024-06-27 20:47:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:45,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:48,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174206634] [2024-06-27 20:47:48,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174206634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:48,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:48,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901321537] [2024-06-27 20:47:48,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:48,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:48,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 351 transitions, 4066 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) [2024-06-27 20:47:48,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:48,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:48,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:50,343 INFO L124 PetriNetUnfolderBase]: 4123/6826 cut-off events. [2024-06-27 20:47:50,343 INFO L125 PetriNetUnfolderBase]: For 369604/369613 co-relation queries the response was YES. [2024-06-27 20:47:50,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41925 conditions, 6826 events. 4123/6826 cut-off events. For 369604/369613 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45461 event pairs, 869 based on Foata normal form. 20/6840 useless extension candidates. Maximal degree in co-relation 41805. Up to 5180 conditions per place. [2024-06-27 20:47:50,420 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 203 selfloop transitions, 203 changer transitions 0/411 dead transitions. [2024-06-27 20:47:50,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 411 transitions, 5509 flow [2024-06-27 20:47:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 20:47:50,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-27 20:47:50,422 INFO L175 Difference]: Start difference. First operand has 247 places, 351 transitions, 4066 flow. Second operand 11 states and 195 transitions. [2024-06-27 20:47:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 411 transitions, 5509 flow [2024-06-27 20:47:51,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 411 transitions, 5342 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:51,130 INFO L231 Difference]: Finished difference. Result has 252 places, 371 transitions, 4543 flow [2024-06-27 20:47:51,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4543, PETRI_PLACES=252, PETRI_TRANSITIONS=371} [2024-06-27 20:47:51,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 20:47:51,130 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 371 transitions, 4543 flow [2024-06-27 20:47:51,131 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) [2024-06-27 20:47:51,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:51,131 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] [2024-06-27 20:47:51,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:47:51,131 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)] === [2024-06-27 20:47:51,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:51,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2047942002, now seen corresponding path program 2 times [2024-06-27 20:47:51,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:51,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015764916] [2024-06-27 20:47:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:51,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:54,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:54,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015764916] [2024-06-27 20:47:54,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015764916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:54,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673492122] [2024-06-27 20:47:54,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:54,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:54,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:54,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 371 transitions, 4543 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) [2024-06-27 20:47:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:55,877 INFO L124 PetriNetUnfolderBase]: 4151/6871 cut-off events. [2024-06-27 20:47:55,877 INFO L125 PetriNetUnfolderBase]: For 353506/353511 co-relation queries the response was YES. [2024-06-27 20:47:55,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42898 conditions, 6871 events. 4151/6871 cut-off events. For 353506/353511 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 45702 event pairs, 889 based on Foata normal form. 8/6873 useless extension candidates. Maximal degree in co-relation 42776. Up to 5204 conditions per place. [2024-06-27 20:47:55,972 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 206 changer transitions 0/413 dead transitions. [2024-06-27 20:47:55,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 413 transitions, 5889 flow [2024-06-27 20:47:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:47:55,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:47:55,974 INFO L175 Difference]: Start difference. First operand has 252 places, 371 transitions, 4543 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:47:55,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 413 transitions, 5889 flow [2024-06-27 20:47:56,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 413 transitions, 5505 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:56,781 INFO L231 Difference]: Finished difference. Result has 255 places, 379 transitions, 4692 flow [2024-06-27 20:47:56,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4692, PETRI_PLACES=255, PETRI_TRANSITIONS=379} [2024-06-27 20:47:56,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 20:47:56,782 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 379 transitions, 4692 flow [2024-06-27 20:47:56,782 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) [2024-06-27 20:47:56,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:56,782 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] [2024-06-27 20:47:56,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:47:56,783 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)] === [2024-06-27 20:47:56,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2055293652, now seen corresponding path program 3 times [2024-06-27 20:47:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:56,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359478587] [2024-06-27 20:47:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:56,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:59,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359478587] [2024-06-27 20:47:59,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359478587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:59,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:59,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:59,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647813888] [2024-06-27 20:47:59,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:59,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:59,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:59,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:59,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:59,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 379 transitions, 4692 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) [2024-06-27 20:47:59,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:59,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:59,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:01,303 INFO L124 PetriNetUnfolderBase]: 4139/6877 cut-off events. [2024-06-27 20:48:01,303 INFO L125 PetriNetUnfolderBase]: For 341197/341202 co-relation queries the response was YES. [2024-06-27 20:48:01,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42469 conditions, 6877 events. 4139/6877 cut-off events. For 341197/341202 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 45897 event pairs, 961 based on Foata normal form. 4/6875 useless extension candidates. Maximal degree in co-relation 42346. Up to 5196 conditions per place. [2024-06-27 20:48:01,383 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 185 changer transitions 0/404 dead transitions. [2024-06-27 20:48:01,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 404 transitions, 5750 flow [2024-06-27 20:48:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:48:01,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:48:01,385 INFO L175 Difference]: Start difference. First operand has 255 places, 379 transitions, 4692 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:48:01,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 404 transitions, 5750 flow [2024-06-27 20:48:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 404 transitions, 5321 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:02,156 INFO L231 Difference]: Finished difference. Result has 256 places, 379 transitions, 4645 flow [2024-06-27 20:48:02,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4645, PETRI_PLACES=256, PETRI_TRANSITIONS=379} [2024-06-27 20:48:02,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 20:48:02,157 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 379 transitions, 4645 flow [2024-06-27 20:48:02,157 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) [2024-06-27 20:48:02,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:02,157 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] [2024-06-27 20:48:02,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:48:02,158 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)] === [2024-06-27 20:48:02,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2055570234, now seen corresponding path program 1 times [2024-06-27 20:48:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:02,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915364211] [2024-06-27 20:48:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:05,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:05,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915364211] [2024-06-27 20:48:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915364211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:05,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:05,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:05,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224786702] [2024-06-27 20:48:05,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:05,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:05,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:05,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 379 transitions, 4645 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) [2024-06-27 20:48:05,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:05,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:05,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:07,314 INFO L124 PetriNetUnfolderBase]: 4258/7083 cut-off events. [2024-06-27 20:48:07,314 INFO L125 PetriNetUnfolderBase]: For 403581/403596 co-relation queries the response was YES. [2024-06-27 20:48:07,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44619 conditions, 7083 events. 4258/7083 cut-off events. For 403581/403596 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 47826 event pairs, 869 based on Foata normal form. 24/7103 useless extension candidates. Maximal degree in co-relation 44495. Up to 5828 conditions per place. [2024-06-27 20:48:07,386 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 69 changer transitions 0/413 dead transitions. [2024-06-27 20:48:07,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 413 transitions, 5829 flow [2024-06-27 20:48:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:48:07,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:48:07,388 INFO L175 Difference]: Start difference. First operand has 256 places, 379 transitions, 4645 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:48:07,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 413 transitions, 5829 flow [2024-06-27 20:48:08,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 413 transitions, 5426 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:08,173 INFO L231 Difference]: Finished difference. Result has 257 places, 383 transitions, 4540 flow [2024-06-27 20:48:08,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4540, PETRI_PLACES=257, PETRI_TRANSITIONS=383} [2024-06-27 20:48:08,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 20:48:08,174 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 383 transitions, 4540 flow [2024-06-27 20:48:08,174 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) [2024-06-27 20:48:08,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:08,174 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] [2024-06-27 20:48:08,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:48:08,174 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)] === [2024-06-27 20:48:08,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:08,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1505329624, now seen corresponding path program 4 times [2024-06-27 20:48:08,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:08,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281217725] [2024-06-27 20:48:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:08,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:11,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:11,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281217725] [2024-06-27 20:48:11,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281217725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:11,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:11,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:11,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778424585] [2024-06-27 20:48:11,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:11,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:11,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 383 transitions, 4540 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) [2024-06-27 20:48:11,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:11,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:11,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:13,038 INFO L124 PetriNetUnfolderBase]: 4304/7163 cut-off events. [2024-06-27 20:48:13,038 INFO L125 PetriNetUnfolderBase]: For 427273/427314 co-relation queries the response was YES. [2024-06-27 20:48:13,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44759 conditions, 7163 events. 4304/7163 cut-off events. For 427273/427314 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 48404 event pairs, 898 based on Foata normal form. 39/7180 useless extension candidates. Maximal degree in co-relation 44633. Up to 6157 conditions per place. [2024-06-27 20:48:13,123 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 85 changer transitions 0/406 dead transitions. [2024-06-27 20:48:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 406 transitions, 5476 flow [2024-06-27 20:48:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:48:13,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:48:13,124 INFO L175 Difference]: Start difference. First operand has 257 places, 383 transitions, 4540 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:48:13,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 406 transitions, 5476 flow [2024-06-27 20:48:14,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 406 transitions, 5332 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 20:48:14,214 INFO L231 Difference]: Finished difference. Result has 261 places, 385 transitions, 4636 flow [2024-06-27 20:48:14,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4636, PETRI_PLACES=261, PETRI_TRANSITIONS=385} [2024-06-27 20:48:14,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 20:48:14,215 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 385 transitions, 4636 flow [2024-06-27 20:48:14,215 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) [2024-06-27 20:48:14,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:14,215 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] [2024-06-27 20:48:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:48:14,215 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)] === [2024-06-27 20:48:14,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1117077744, now seen corresponding path program 4 times [2024-06-27 20:48:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:14,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368175712] [2024-06-27 20:48:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:14,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368175712] [2024-06-27 20:48:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368175712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:16,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538686756] [2024-06-27 20:48:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:16,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:16,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 385 transitions, 4636 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) [2024-06-27 20:48:16,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:16,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:18,999 INFO L124 PetriNetUnfolderBase]: 4376/7210 cut-off events. [2024-06-27 20:48:18,999 INFO L125 PetriNetUnfolderBase]: For 418227/418231 co-relation queries the response was YES. [2024-06-27 20:48:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46024 conditions, 7210 events. 4376/7210 cut-off events. For 418227/418231 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48215 event pairs, 997 based on Foata normal form. 10/7191 useless extension candidates. Maximal degree in co-relation 45896. Up to 6015 conditions per place. [2024-06-27 20:48:19,076 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 160 changer transitions 0/437 dead transitions. [2024-06-27 20:48:19,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 437 transitions, 6160 flow [2024-06-27 20:48:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:48:19,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:48:19,078 INFO L175 Difference]: Start difference. First operand has 261 places, 385 transitions, 4636 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:48:19,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 437 transitions, 6160 flow [2024-06-27 20:48:20,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 437 transitions, 5948 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:20,120 INFO L231 Difference]: Finished difference. Result has 265 places, 404 transitions, 5025 flow [2024-06-27 20:48:20,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5025, PETRI_PLACES=265, PETRI_TRANSITIONS=404} [2024-06-27 20:48:20,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 20:48:20,120 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 404 transitions, 5025 flow [2024-06-27 20:48:20,120 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) [2024-06-27 20:48:20,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:20,121 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] [2024-06-27 20:48:20,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:48:20,121 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:20,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1165295974, now seen corresponding path program 5 times [2024-06-27 20:48:20,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:20,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003199899] [2024-06-27 20:48:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:22,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:22,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003199899] [2024-06-27 20:48:22,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003199899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:22,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:22,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:22,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024433920] [2024-06-27 20:48:22,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:22,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:22,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:22,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:22,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 404 transitions, 5025 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) [2024-06-27 20:48:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:22,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:24,567 INFO L124 PetriNetUnfolderBase]: 4364/7192 cut-off events. [2024-06-27 20:48:24,567 INFO L125 PetriNetUnfolderBase]: For 404754/404756 co-relation queries the response was YES. [2024-06-27 20:48:24,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45747 conditions, 7192 events. 4364/7192 cut-off events. For 404754/404756 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 48044 event pairs, 1005 based on Foata normal form. 4/7167 useless extension candidates. Maximal degree in co-relation 45618. Up to 6005 conditions per place. [2024-06-27 20:48:24,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 265 selfloop transitions, 159 changer transitions 0/429 dead transitions. [2024-06-27 20:48:24,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 429 transitions, 6111 flow [2024-06-27 20:48:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:48:24,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:48:24,659 INFO L175 Difference]: Start difference. First operand has 265 places, 404 transitions, 5025 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:48:24,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 429 transitions, 6111 flow [2024-06-27 20:48:25,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 429 transitions, 5835 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:25,552 INFO L231 Difference]: Finished difference. Result has 268 places, 404 transitions, 5075 flow [2024-06-27 20:48:25,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5075, PETRI_PLACES=268, PETRI_TRANSITIONS=404} [2024-06-27 20:48:25,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 20:48:25,553 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 404 transitions, 5075 flow [2024-06-27 20:48:25,555 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) [2024-06-27 20:48:25,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:25,555 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] [2024-06-27 20:48:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:48:25,556 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:25,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 513054962, now seen corresponding path program 6 times [2024-06-27 20:48:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326693337] [2024-06-27 20:48:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:28,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326693337] [2024-06-27 20:48:28,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326693337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:28,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:28,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018465724] [2024-06-27 20:48:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:28,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 404 transitions, 5075 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) [2024-06-27 20:48:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:28,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:28,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:30,214 INFO L124 PetriNetUnfolderBase]: 4340/7154 cut-off events. [2024-06-27 20:48:30,214 INFO L125 PetriNetUnfolderBase]: For 395920/395928 co-relation queries the response was YES. [2024-06-27 20:48:30,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44981 conditions, 7154 events. 4340/7154 cut-off events. For 395920/395928 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 47912 event pairs, 977 based on Foata normal form. 14/7137 useless extension candidates. Maximal degree in co-relation 44850. Up to 6037 conditions per place. [2024-06-27 20:48:30,294 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 147 changer transitions 0/432 dead transitions. [2024-06-27 20:48:30,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 432 transitions, 6031 flow [2024-06-27 20:48:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:48:30,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:48:30,296 INFO L175 Difference]: Start difference. First operand has 268 places, 404 transitions, 5075 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:48:30,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 432 transitions, 6031 flow [2024-06-27 20:48:31,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 5679 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:31,165 INFO L231 Difference]: Finished difference. Result has 269 places, 404 transitions, 5032 flow [2024-06-27 20:48:31,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5032, PETRI_PLACES=269, PETRI_TRANSITIONS=404} [2024-06-27 20:48:31,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 20:48:31,166 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 404 transitions, 5032 flow [2024-06-27 20:48:31,167 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) [2024-06-27 20:48:31,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:31,167 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] [2024-06-27 20:48:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:48:31,167 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)] === [2024-06-27 20:48:31,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 347418820, now seen corresponding path program 7 times [2024-06-27 20:48:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:31,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021205475] [2024-06-27 20:48:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:34,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:34,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021205475] [2024-06-27 20:48:34,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021205475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:34,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:34,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:34,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143654694] [2024-06-27 20:48:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:34,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:34,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 404 transitions, 5032 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) [2024-06-27 20:48:34,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:36,350 INFO L124 PetriNetUnfolderBase]: 4532/7444 cut-off events. [2024-06-27 20:48:36,350 INFO L125 PetriNetUnfolderBase]: For 401558/401569 co-relation queries the response was YES. [2024-06-27 20:48:36,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46893 conditions, 7444 events. 4532/7444 cut-off events. For 401558/401569 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 49901 event pairs, 1067 based on Foata normal form. 8/7432 useless extension candidates. Maximal degree in co-relation 46761. Up to 6118 conditions per place. [2024-06-27 20:48:36,441 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 316 selfloop transitions, 178 changer transitions 0/499 dead transitions. [2024-06-27 20:48:36,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 499 transitions, 7215 flow [2024-06-27 20:48:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:48:36,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:48:36,443 INFO L175 Difference]: Start difference. First operand has 269 places, 404 transitions, 5032 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:48:36,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 499 transitions, 7215 flow [2024-06-27 20:48:37,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 499 transitions, 6889 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:37,441 INFO L231 Difference]: Finished difference. Result has 275 places, 462 transitions, 6138 flow [2024-06-27 20:48:37,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6138, PETRI_PLACES=275, PETRI_TRANSITIONS=462} [2024-06-27 20:48:37,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 20:48:37,451 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 462 transitions, 6138 flow [2024-06-27 20:48:37,451 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) [2024-06-27 20:48:37,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:37,451 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] [2024-06-27 20:48:37,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:48:37,452 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)] === [2024-06-27 20:48:37,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash 657124052, now seen corresponding path program 8 times [2024-06-27 20:48:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:37,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173480794] [2024-06-27 20:48:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:37,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173480794] [2024-06-27 20:48:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173480794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:39,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:39,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362450548] [2024-06-27 20:48:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:39,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:39,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 462 transitions, 6138 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) [2024-06-27 20:48:39,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:39,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:39,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:42,388 INFO L124 PetriNetUnfolderBase]: 4558/7476 cut-off events. [2024-06-27 20:48:42,389 INFO L125 PetriNetUnfolderBase]: For 423467/423469 co-relation queries the response was YES. [2024-06-27 20:48:42,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49568 conditions, 7476 events. 4558/7476 cut-off events. For 423467/423469 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49980 event pairs, 921 based on Foata normal form. 2/7454 useless extension candidates. Maximal degree in co-relation 49431. Up to 5881 conditions per place. [2024-06-27 20:48:42,480 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 221 changer transitions 1/504 dead transitions. [2024-06-27 20:48:42,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 504 transitions, 7993 flow [2024-06-27 20:48:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:48:42,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:48:42,482 INFO L175 Difference]: Start difference. First operand has 275 places, 462 transitions, 6138 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:48:42,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 504 transitions, 7993 flow [2024-06-27 20:48:43,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 504 transitions, 7793 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-27 20:48:43,804 INFO L231 Difference]: Finished difference. Result has 282 places, 474 transitions, 6853 flow [2024-06-27 20:48:43,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6853, PETRI_PLACES=282, PETRI_TRANSITIONS=474} [2024-06-27 20:48:43,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 20:48:43,805 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 474 transitions, 6853 flow [2024-06-27 20:48:43,805 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) [2024-06-27 20:48:43,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:43,806 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] [2024-06-27 20:48:43,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:48:43,806 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)] === [2024-06-27 20:48:43,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 657361202, now seen corresponding path program 9 times [2024-06-27 20:48:43,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:43,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843507432] [2024-06-27 20:48:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:43,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:46,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:46,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843507432] [2024-06-27 20:48:46,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843507432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:46,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:46,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583619405] [2024-06-27 20:48:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:46,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:46,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:46,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 474 transitions, 6853 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) [2024-06-27 20:48:46,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:46,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:46,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:48,882 INFO L124 PetriNetUnfolderBase]: 4532/7452 cut-off events. [2024-06-27 20:48:48,883 INFO L125 PetriNetUnfolderBase]: For 427930/427932 co-relation queries the response was YES. [2024-06-27 20:48:48,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50575 conditions, 7452 events. 4532/7452 cut-off events. For 427930/427932 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 50026 event pairs, 911 based on Foata normal form. 2/7430 useless extension candidates. Maximal degree in co-relation 50435. Up to 5850 conditions per place. [2024-06-27 20:48:48,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 224 changer transitions 0/502 dead transitions. [2024-06-27 20:48:48,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 502 transitions, 8272 flow [2024-06-27 20:48:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:48:48,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:48:48,968 INFO L175 Difference]: Start difference. First operand has 282 places, 474 transitions, 6853 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:48:48,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 502 transitions, 8272 flow [2024-06-27 20:48:50,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 502 transitions, 8006 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 20:48:50,230 INFO L231 Difference]: Finished difference. Result has 288 places, 474 transitions, 7041 flow [2024-06-27 20:48:50,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6587, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7041, PETRI_PLACES=288, PETRI_TRANSITIONS=474} [2024-06-27 20:48:50,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-27 20:48:50,231 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 474 transitions, 7041 flow [2024-06-27 20:48:50,231 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) [2024-06-27 20:48:50,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:50,231 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] [2024-06-27 20:48:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:48:50,231 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)] === [2024-06-27 20:48:50,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 506264242, now seen corresponding path program 10 times [2024-06-27 20:48:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:50,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443815546] [2024-06-27 20:48:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:53,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:53,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443815546] [2024-06-27 20:48:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443815546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:53,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:53,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:53,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406551386] [2024-06-27 20:48:53,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:53,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:53,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:53,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:53,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 474 transitions, 7041 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) [2024-06-27 20:48:53,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:53,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:53,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:55,400 INFO L124 PetriNetUnfolderBase]: 4536/7503 cut-off events. [2024-06-27 20:48:55,400 INFO L125 PetriNetUnfolderBase]: For 440398/440439 co-relation queries the response was YES. [2024-06-27 20:48:55,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 7503 events. 4536/7503 cut-off events. For 440398/440439 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50584 event pairs, 996 based on Foata normal form. 6/7485 useless extension candidates. Maximal degree in co-relation 50591. Up to 5851 conditions per place. [2024-06-27 20:48:55,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 194 changer transitions 0/500 dead transitions. [2024-06-27 20:48:55,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 500 transitions, 8546 flow [2024-06-27 20:48:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:48:55,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:48:55,504 INFO L175 Difference]: Start difference. First operand has 288 places, 474 transitions, 7041 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:48:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 500 transitions, 8546 flow [2024-06-27 20:48:56,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 500 transitions, 8151 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:56,841 INFO L231 Difference]: Finished difference. Result has 291 places, 481 transitions, 7263 flow [2024-06-27 20:48:56,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7263, PETRI_PLACES=291, PETRI_TRANSITIONS=481} [2024-06-27 20:48:56,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 20:48:56,842 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 481 transitions, 7263 flow [2024-06-27 20:48:56,842 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) [2024-06-27 20:48:56,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:56,842 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] [2024-06-27 20:48:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:48:56,842 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:48:56,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1510094386, now seen corresponding path program 11 times [2024-06-27 20:48:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:56,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352805659] [2024-06-27 20:48:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:59,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352805659] [2024-06-27 20:48:59,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352805659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:59,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:59,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:59,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831660486] [2024-06-27 20:48:59,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:59,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:59,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:59,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:59,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 481 transitions, 7263 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) [2024-06-27 20:48:59,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:59,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:59,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:02,015 INFO L124 PetriNetUnfolderBase]: 4546/7505 cut-off events. [2024-06-27 20:49:02,015 INFO L125 PetriNetUnfolderBase]: For 444126/444167 co-relation queries the response was YES. [2024-06-27 20:49:02,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51147 conditions, 7505 events. 4546/7505 cut-off events. For 444126/444167 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50573 event pairs, 979 based on Foata normal form. 4/7485 useless extension candidates. Maximal degree in co-relation 51003. Up to 5857 conditions per place. [2024-06-27 20:49:02,106 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 211 changer transitions 0/503 dead transitions. [2024-06-27 20:49:02,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 503 transitions, 8712 flow [2024-06-27 20:49:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:49:02,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:49:02,108 INFO L175 Difference]: Start difference. First operand has 291 places, 481 transitions, 7263 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:49:02,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 503 transitions, 8712 flow [2024-06-27 20:49:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 503 transitions, 8433 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-27 20:49:03,426 INFO L231 Difference]: Finished difference. Result has 296 places, 484 transitions, 7493 flow [2024-06-27 20:49:03,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6998, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7493, PETRI_PLACES=296, PETRI_TRANSITIONS=484} [2024-06-27 20:49:03,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 20:49:03,427 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 484 transitions, 7493 flow [2024-06-27 20:49:03,428 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) [2024-06-27 20:49:03,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:03,428 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] [2024-06-27 20:49:03,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:49:03,428 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:03,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1628772548, now seen corresponding path program 12 times [2024-06-27 20:49:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:03,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7748481] [2024-06-27 20:49:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:05,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:05,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7748481] [2024-06-27 20:49:05,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7748481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:05,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:05,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091550050] [2024-06-27 20:49:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:06,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:06,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 484 transitions, 7493 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) [2024-06-27 20:49:06,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:06,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:06,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:08,446 INFO L124 PetriNetUnfolderBase]: 4540/7497 cut-off events. [2024-06-27 20:49:08,446 INFO L125 PetriNetUnfolderBase]: For 449485/449526 co-relation queries the response was YES. [2024-06-27 20:49:08,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50922 conditions, 7497 events. 4540/7497 cut-off events. For 449485/449526 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 50451 event pairs, 979 based on Foata normal form. 4/7477 useless extension candidates. Maximal degree in co-relation 50776. Up to 5854 conditions per place. [2024-06-27 20:49:08,544 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 215 changer transitions 0/502 dead transitions. [2024-06-27 20:49:08,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 502 transitions, 8697 flow [2024-06-27 20:49:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:49:08,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:49:08,546 INFO L175 Difference]: Start difference. First operand has 296 places, 484 transitions, 7493 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:49:08,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 502 transitions, 8697 flow [2024-06-27 20:49:10,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 502 transitions, 8248 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 20:49:10,241 INFO L231 Difference]: Finished difference. Result has 299 places, 484 transitions, 7480 flow [2024-06-27 20:49:10,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7044, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7480, PETRI_PLACES=299, PETRI_TRANSITIONS=484} [2024-06-27 20:49:10,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 20:49:10,242 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 484 transitions, 7480 flow [2024-06-27 20:49:10,242 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) [2024-06-27 20:49:10,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:10,242 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] [2024-06-27 20:49:10,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:49:10,243 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:10,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1518241558, now seen corresponding path program 2 times [2024-06-27 20:49:10,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:10,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598833926] [2024-06-27 20:49:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:13,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:13,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598833926] [2024-06-27 20:49:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598833926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:13,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:13,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678141009] [2024-06-27 20:49:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:13,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:13,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:13,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 484 transitions, 7480 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) [2024-06-27 20:49:13,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:13,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:13,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:15,962 INFO L124 PetriNetUnfolderBase]: 4659/7696 cut-off events. [2024-06-27 20:49:15,962 INFO L125 PetriNetUnfolderBase]: For 538618/538659 co-relation queries the response was YES. [2024-06-27 20:49:16,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53503 conditions, 7696 events. 4659/7696 cut-off events. For 538618/538659 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52092 event pairs, 916 based on Foata normal form. 31/7705 useless extension candidates. Maximal degree in co-relation 53356. Up to 6437 conditions per place. [2024-06-27 20:49:16,068 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 95 changer transitions 0/512 dead transitions. [2024-06-27 20:49:16,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 512 transitions, 8888 flow [2024-06-27 20:49:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:49:16,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:49:16,070 INFO L175 Difference]: Start difference. First operand has 299 places, 484 transitions, 7480 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:49:16,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 512 transitions, 8888 flow [2024-06-27 20:49:17,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 512 transitions, 8454 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:17,629 INFO L231 Difference]: Finished difference. Result has 301 places, 488 transitions, 7396 flow [2024-06-27 20:49:17,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7046, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7396, PETRI_PLACES=301, PETRI_TRANSITIONS=488} [2024-06-27 20:49:17,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 20:49:17,630 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 488 transitions, 7396 flow [2024-06-27 20:49:17,630 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) [2024-06-27 20:49:17,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:17,630 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] [2024-06-27 20:49:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:49:17,630 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:17,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1948558138, now seen corresponding path program 3 times [2024-06-27 20:49:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:17,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908744813] [2024-06-27 20:49:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:17,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:21,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908744813] [2024-06-27 20:49:21,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908744813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:21,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:21,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446683865] [2024-06-27 20:49:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:21,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:21,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:21,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:21,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 488 transitions, 7396 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) [2024-06-27 20:49:21,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:21,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:21,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:23,384 INFO L124 PetriNetUnfolderBase]: 4693/7758 cut-off events. [2024-06-27 20:49:23,385 INFO L125 PetriNetUnfolderBase]: For 540224/540265 co-relation queries the response was YES. [2024-06-27 20:49:23,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53693 conditions, 7758 events. 4693/7758 cut-off events. For 540224/540265 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 52603 event pairs, 922 based on Foata normal form. 31/7767 useless extension candidates. Maximal degree in co-relation 53544. Up to 5871 conditions per place. [2024-06-27 20:49:23,488 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 105 changer transitions 0/518 dead transitions. [2024-06-27 20:49:23,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 518 transitions, 8970 flow [2024-06-27 20:49:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:49:23,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:49:23,490 INFO L175 Difference]: Start difference. First operand has 301 places, 488 transitions, 7396 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:49:23,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 518 transitions, 8970 flow [2024-06-27 20:49:25,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 518 transitions, 8783 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:25,384 INFO L231 Difference]: Finished difference. Result has 306 places, 491 transitions, 7543 flow [2024-06-27 20:49:25,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7543, PETRI_PLACES=306, PETRI_TRANSITIONS=491} [2024-06-27 20:49:25,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 20:49:25,385 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 491 transitions, 7543 flow [2024-06-27 20:49:25,385 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) [2024-06-27 20:49:25,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:25,386 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] [2024-06-27 20:49:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:49:25,386 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)] === [2024-06-27 20:49:25,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash 465442702, now seen corresponding path program 1 times [2024-06-27 20:49:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:25,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646683359] [2024-06-27 20:49:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:25,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:28,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646683359] [2024-06-27 20:49:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646683359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:28,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:28,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:28,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991842719] [2024-06-27 20:49:28,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:28,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:28,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 491 transitions, 7543 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) [2024-06-27 20:49:28,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:28,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:28,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:30,567 INFO L124 PetriNetUnfolderBase]: 4701/7768 cut-off events. [2024-06-27 20:49:30,567 INFO L125 PetriNetUnfolderBase]: For 515840/515842 co-relation queries the response was YES. [2024-06-27 20:49:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54096 conditions, 7768 events. 4701/7768 cut-off events. For 515840/515842 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 52783 event pairs, 1346 based on Foata normal form. 2/7767 useless extension candidates. Maximal degree in co-relation 53944. Up to 7230 conditions per place. [2024-06-27 20:49:30,689 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 483 selfloop transitions, 30 changer transitions 0/518 dead transitions. [2024-06-27 20:49:30,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 518 transitions, 8679 flow [2024-06-27 20:49:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:49:30,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:49:30,691 INFO L175 Difference]: Start difference. First operand has 306 places, 491 transitions, 7543 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:49:30,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 518 transitions, 8679 flow [2024-06-27 20:49:32,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 518 transitions, 8332 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:32,321 INFO L231 Difference]: Finished difference. Result has 308 places, 493 transitions, 7311 flow [2024-06-27 20:49:32,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7196, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7311, PETRI_PLACES=308, PETRI_TRANSITIONS=493} [2024-06-27 20:49:32,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 20:49:32,322 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 493 transitions, 7311 flow [2024-06-27 20:49:32,322 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) [2024-06-27 20:49:32,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:32,322 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] [2024-06-27 20:49:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:49:32,323 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)] === [2024-06-27 20:49:32,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 657577892, now seen corresponding path program 2 times [2024-06-27 20:49:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415346146] [2024-06-27 20:49:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:35,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:35,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415346146] [2024-06-27 20:49:35,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415346146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:35,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:35,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:35,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934488907] [2024-06-27 20:49:35,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:35,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:35,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 493 transitions, 7311 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) [2024-06-27 20:49:35,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:35,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:35,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:37,955 INFO L124 PetriNetUnfolderBase]: 4709/7780 cut-off events. [2024-06-27 20:49:37,955 INFO L125 PetriNetUnfolderBase]: For 525876/525878 co-relation queries the response was YES. [2024-06-27 20:49:38,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52940 conditions, 7780 events. 4709/7780 cut-off events. For 525876/525878 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52828 event pairs, 1348 based on Foata normal form. 2/7779 useless extension candidates. Maximal degree in co-relation 52788. Up to 7242 conditions per place. [2024-06-27 20:49:38,052 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 482 selfloop transitions, 29 changer transitions 0/516 dead transitions. [2024-06-27 20:49:38,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 516 transitions, 8435 flow [2024-06-27 20:49:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:49:38,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:49:38,054 INFO L175 Difference]: Start difference. First operand has 308 places, 493 transitions, 7311 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:49:38,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 516 transitions, 8435 flow [2024-06-27 20:49:39,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 516 transitions, 8336 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:39,780 INFO L231 Difference]: Finished difference. Result has 310 places, 495 transitions, 7329 flow [2024-06-27 20:49:39,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7212, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7329, PETRI_PLACES=310, PETRI_TRANSITIONS=495} [2024-06-27 20:49:39,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 20:49:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 495 transitions, 7329 flow [2024-06-27 20:49:39,781 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) [2024-06-27 20:49:39,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:39,782 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] [2024-06-27 20:49:39,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:49:39,782 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)] === [2024-06-27 20:49:39,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash 657585332, now seen corresponding path program 3 times [2024-06-27 20:49:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761500490] [2024-06-27 20:49:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:42,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:42,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761500490] [2024-06-27 20:49:42,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761500490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:42,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:42,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:42,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56234425] [2024-06-27 20:49:42,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:42,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:42,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:42,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:42,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 495 transitions, 7329 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) [2024-06-27 20:49:42,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:42,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:42,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:45,128 INFO L124 PetriNetUnfolderBase]: 4717/7792 cut-off events. [2024-06-27 20:49:45,128 INFO L125 PetriNetUnfolderBase]: For 538788/538790 co-relation queries the response was YES. [2024-06-27 20:49:45,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53281 conditions, 7792 events. 4717/7792 cut-off events. For 538788/538790 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 52881 event pairs, 1346 based on Foata normal form. 2/7791 useless extension candidates. Maximal degree in co-relation 53128. Up to 7234 conditions per place. [2024-06-27 20:49:45,243 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 479 selfloop transitions, 34 changer transitions 0/518 dead transitions. [2024-06-27 20:49:45,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 518 transitions, 8461 flow [2024-06-27 20:49:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:49:45,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:49:45,244 INFO L175 Difference]: Start difference. First operand has 310 places, 495 transitions, 7329 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:49:45,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 518 transitions, 8461 flow [2024-06-27 20:49:47,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 518 transitions, 8360 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:47,372 INFO L231 Difference]: Finished difference. Result has 312 places, 497 transitions, 7359 flow [2024-06-27 20:49:47,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7359, PETRI_PLACES=312, PETRI_TRANSITIONS=497} [2024-06-27 20:49:47,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:49:47,372 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 497 transitions, 7359 flow [2024-06-27 20:49:47,373 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) [2024-06-27 20:49:47,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:47,373 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] [2024-06-27 20:49:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:49:47,373 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)] === [2024-06-27 20:49:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash 8930080, now seen corresponding path program 4 times [2024-06-27 20:49:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552512974] [2024-06-27 20:49:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:50,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552512974] [2024-06-27 20:49:50,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552512974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:50,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:50,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339388810] [2024-06-27 20:49:50,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:50,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:50,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:50,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:50,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:50,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:50,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 497 transitions, 7359 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) [2024-06-27 20:49:50,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:50,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:50,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:52,506 INFO L124 PetriNetUnfolderBase]: 4725/7810 cut-off events. [2024-06-27 20:49:52,507 INFO L125 PetriNetUnfolderBase]: For 551489/551494 co-relation queries the response was YES. [2024-06-27 20:49:52,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53656 conditions, 7810 events. 4725/7810 cut-off events. For 551489/551494 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 53086 event pairs, 1349 based on Foata normal form. 4/7809 useless extension candidates. Maximal degree in co-relation 53502. Up to 7266 conditions per place. [2024-06-27 20:49:52,603 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 481 selfloop transitions, 29 changer transitions 0/515 dead transitions. [2024-06-27 20:49:52,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 515 transitions, 8475 flow [2024-06-27 20:49:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:49:52,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:49:52,605 INFO L175 Difference]: Start difference. First operand has 312 places, 497 transitions, 7359 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:49:52,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 515 transitions, 8475 flow [2024-06-27 20:49:54,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 515 transitions, 8360 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:54,096 INFO L231 Difference]: Finished difference. Result has 314 places, 499 transitions, 7369 flow [2024-06-27 20:49:54,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7244, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7369, PETRI_PLACES=314, PETRI_TRANSITIONS=499} [2024-06-27 20:49:54,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 20:49:54,096 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 499 transitions, 7369 flow [2024-06-27 20:49:54,097 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) [2024-06-27 20:49:54,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:54,097 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] [2024-06-27 20:49:54,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:49:54,097 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)] === [2024-06-27 20:49:54,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:54,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1690195396, now seen corresponding path program 5 times [2024-06-27 20:49:54,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:54,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353828881] [2024-06-27 20:49:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:54,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:56,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353828881] [2024-06-27 20:49:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353828881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:56,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:56,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:56,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092529231] [2024-06-27 20:49:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:56,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:56,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:56,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:57,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:57,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 499 transitions, 7369 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) [2024-06-27 20:49:57,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:57,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:57,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:59,211 INFO L124 PetriNetUnfolderBase]: 4733/7822 cut-off events. [2024-06-27 20:49:59,211 INFO L125 PetriNetUnfolderBase]: For 564520/564525 co-relation queries the response was YES. [2024-06-27 20:49:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53983 conditions, 7822 events. 4733/7822 cut-off events. For 564520/564525 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 53151 event pairs, 1349 based on Foata normal form. 4/7821 useless extension candidates. Maximal degree in co-relation 53828. Up to 7264 conditions per place. [2024-06-27 20:49:59,330 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 480 selfloop transitions, 32 changer transitions 0/517 dead transitions. [2024-06-27 20:49:59,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 517 transitions, 8493 flow [2024-06-27 20:49:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:49:59,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 20:49:59,332 INFO L175 Difference]: Start difference. First operand has 314 places, 499 transitions, 7369 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:49:59,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 517 transitions, 8493 flow [2024-06-27 20:50:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 517 transitions, 8384 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:01,684 INFO L231 Difference]: Finished difference. Result has 316 places, 501 transitions, 7395 flow [2024-06-27 20:50:01,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7395, PETRI_PLACES=316, PETRI_TRANSITIONS=501} [2024-06-27 20:50:01,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 20:50:01,701 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 501 transitions, 7395 flow [2024-06-27 20:50:01,701 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) [2024-06-27 20:50:01,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:01,701 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] [2024-06-27 20:50:01,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:50:01,701 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:01,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1948742836, now seen corresponding path program 6 times [2024-06-27 20:50:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:01,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351941895] [2024-06-27 20:50:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:04,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351941895] [2024-06-27 20:50:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351941895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:04,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:04,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:04,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465936131] [2024-06-27 20:50:04,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:04,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:04,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:04,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:04,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 501 transitions, 7395 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) [2024-06-27 20:50:04,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:04,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:04,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:06,907 INFO L124 PetriNetUnfolderBase]: 4728/7813 cut-off events. [2024-06-27 20:50:06,907 INFO L125 PetriNetUnfolderBase]: For 569136/569141 co-relation queries the response was YES. [2024-06-27 20:50:07,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53938 conditions, 7813 events. 4728/7813 cut-off events. For 569136/569141 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 53127 event pairs, 1321 based on Foata normal form. 4/7812 useless extension candidates. Maximal degree in co-relation 53782. Up to 7209 conditions per place. [2024-06-27 20:50:07,050 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 471 selfloop transitions, 43 changer transitions 0/519 dead transitions. [2024-06-27 20:50:07,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 519 transitions, 8527 flow [2024-06-27 20:50:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:50:07,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:50:07,051 INFO L175 Difference]: Start difference. First operand has 316 places, 501 transitions, 7395 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:50:07,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 519 transitions, 8527 flow [2024-06-27 20:50:10,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 519 transitions, 8408 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:10,208 INFO L231 Difference]: Finished difference. Result has 318 places, 503 transitions, 7437 flow [2024-06-27 20:50:10,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7276, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7437, PETRI_PLACES=318, PETRI_TRANSITIONS=503} [2024-06-27 20:50:10,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:50:10,209 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 503 transitions, 7437 flow [2024-06-27 20:50:10,209 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) [2024-06-27 20:50:10,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:10,209 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] [2024-06-27 20:50:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:50:10,210 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:10,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1213387375, now seen corresponding path program 1 times [2024-06-27 20:50:10,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:10,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18140865] [2024-06-27 20:50:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:10,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:13,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:13,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18140865] [2024-06-27 20:50:13,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18140865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:13,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:13,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929921704] [2024-06-27 20:50:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:13,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:13,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 503 transitions, 7437 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) [2024-06-27 20:50:13,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:13,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:13,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:16,763 INFO L124 PetriNetUnfolderBase]: 4858/7999 cut-off events. [2024-06-27 20:50:16,763 INFO L125 PetriNetUnfolderBase]: For 654695/654704 co-relation queries the response was YES. [2024-06-27 20:50:16,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56129 conditions, 7999 events. 4858/7999 cut-off events. For 654695/654704 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 54397 event pairs, 986 based on Foata normal form. 14/8007 useless extension candidates. Maximal degree in co-relation 55972. Up to 6053 conditions per place. [2024-06-27 20:50:16,885 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 265 selfloop transitions, 309 changer transitions 0/579 dead transitions. [2024-06-27 20:50:16,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 579 transitions, 9509 flow [2024-06-27 20:50:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:50:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:50:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-06-27 20:50:16,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2024-06-27 20:50:16,887 INFO L175 Difference]: Start difference. First operand has 318 places, 503 transitions, 7437 flow. Second operand 13 states and 226 transitions. [2024-06-27 20:50:16,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 579 transitions, 9509 flow [2024-06-27 20:50:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 579 transitions, 9364 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:19,342 INFO L231 Difference]: Finished difference. Result has 325 places, 533 transitions, 8365 flow [2024-06-27 20:50:19,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7292, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8365, PETRI_PLACES=325, PETRI_TRANSITIONS=533} [2024-06-27 20:50:19,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 20:50:19,343 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 533 transitions, 8365 flow [2024-06-27 20:50:19,343 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) [2024-06-27 20:50:19,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:19,344 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] [2024-06-27 20:50:19,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:50:19,344 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:19,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1468631259, now seen corresponding path program 2 times [2024-06-27 20:50:19,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:19,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403802226] [2024-06-27 20:50:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:19,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:22,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:22,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403802226] [2024-06-27 20:50:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403802226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:22,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:22,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:22,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479435426] [2024-06-27 20:50:22,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:22,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:22,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:22,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:22,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:22,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 533 transitions, 8365 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) [2024-06-27 20:50:22,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:22,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:22,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:25,898 INFO L124 PetriNetUnfolderBase]: 4876/8037 cut-off events. [2024-06-27 20:50:25,898 INFO L125 PetriNetUnfolderBase]: For 655140/655149 co-relation queries the response was YES. [2024-06-27 20:50:25,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57325 conditions, 8037 events. 4876/8037 cut-off events. For 655140/655149 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 54664 event pairs, 986 based on Foata normal form. 14/8045 useless extension candidates. Maximal degree in co-relation 57167. Up to 6073 conditions per place. [2024-06-27 20:50:26,015 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 318 changer transitions 0/592 dead transitions. [2024-06-27 20:50:26,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 592 transitions, 10205 flow [2024-06-27 20:50:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 20:50:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 20:50:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 253 transitions. [2024-06-27 20:50:26,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015873015873016 [2024-06-27 20:50:26,017 INFO L175 Difference]: Start difference. First operand has 325 places, 533 transitions, 8365 flow. Second operand 15 states and 253 transitions. [2024-06-27 20:50:26,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 592 transitions, 10205 flow [2024-06-27 20:50:27,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 592 transitions, 9451 flow, removed 59 selfloop flow, removed 10 redundant places. [2024-06-27 20:50:27,973 INFO L231 Difference]: Finished difference. Result has 330 places, 542 transitions, 8431 flow [2024-06-27 20:50:27,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8431, PETRI_PLACES=330, PETRI_TRANSITIONS=542} [2024-06-27 20:50:27,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 20:50:27,974 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 542 transitions, 8431 flow [2024-06-27 20:50:27,974 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) [2024-06-27 20:50:27,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:27,974 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] [2024-06-27 20:50:27,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:50:27,975 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:27,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash -938478976, now seen corresponding path program 1 times [2024-06-27 20:50:27,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:27,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269888338] [2024-06-27 20:50:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:27,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269888338] [2024-06-27 20:50:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269888338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:31,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:31,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648348642] [2024-06-27 20:50:31,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:31,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:31,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 542 transitions, 8431 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) [2024-06-27 20:50:31,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:31,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:34,201 INFO L124 PetriNetUnfolderBase]: 4960/8147 cut-off events. [2024-06-27 20:50:34,202 INFO L125 PetriNetUnfolderBase]: For 679309/679318 co-relation queries the response was YES. [2024-06-27 20:50:34,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58986 conditions, 8147 events. 4960/8147 cut-off events. For 679309/679318 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55329 event pairs, 1011 based on Foata normal form. 8/8149 useless extension candidates. Maximal degree in co-relation 58827. Up to 5965 conditions per place. [2024-06-27 20:50:34,316 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 285 selfloop transitions, 304 changer transitions 0/594 dead transitions. [2024-06-27 20:50:34,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 594 transitions, 10353 flow [2024-06-27 20:50:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-27 20:50:34,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:50:34,318 INFO L175 Difference]: Start difference. First operand has 330 places, 542 transitions, 8431 flow. Second operand 12 states and 210 transitions. [2024-06-27 20:50:34,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 594 transitions, 10353 flow [2024-06-27 20:50:36,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 594 transitions, 9703 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-27 20:50:36,328 INFO L231 Difference]: Finished difference. Result has 330 places, 553 transitions, 8655 flow [2024-06-27 20:50:36,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7781, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8655, PETRI_PLACES=330, PETRI_TRANSITIONS=553} [2024-06-27 20:50:36,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 20:50:36,328 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 553 transitions, 8655 flow [2024-06-27 20:50:36,329 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) [2024-06-27 20:50:36,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:36,329 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] [2024-06-27 20:50:36,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:50:36,329 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:36,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1776264937, now seen corresponding path program 3 times [2024-06-27 20:50:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:36,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818257016] [2024-06-27 20:50:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:39,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818257016] [2024-06-27 20:50:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818257016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:39,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141504163] [2024-06-27 20:50:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:39,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:39,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:39,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 553 transitions, 8655 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:39,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:39,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:39,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:42,039 INFO L124 PetriNetUnfolderBase]: 5042/8305 cut-off events. [2024-06-27 20:50:42,040 INFO L125 PetriNetUnfolderBase]: For 744606/744619 co-relation queries the response was YES. [2024-06-27 20:50:42,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61096 conditions, 8305 events. 5042/8305 cut-off events. For 744606/744619 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 56659 event pairs, 1032 based on Foata normal form. 20/8319 useless extension candidates. Maximal degree in co-relation 60935. Up to 6269 conditions per place. [2024-06-27 20:50:42,161 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 270 selfloop transitions, 341 changer transitions 0/616 dead transitions. [2024-06-27 20:50:42,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 616 transitions, 10720 flow [2024-06-27 20:50:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 20:50:42,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-27 20:50:42,163 INFO L175 Difference]: Start difference. First operand has 330 places, 553 transitions, 8655 flow. Second operand 11 states and 200 transitions. [2024-06-27 20:50:42,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 616 transitions, 10720 flow [2024-06-27 20:50:44,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 616 transitions, 10364 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:44,956 INFO L231 Difference]: Finished difference. Result has 334 places, 574 transitions, 9350 flow [2024-06-27 20:50:44,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9350, PETRI_PLACES=334, PETRI_TRANSITIONS=574} [2024-06-27 20:50:44,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-27 20:50:44,957 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 574 transitions, 9350 flow [2024-06-27 20:50:44,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:44,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:44,957 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] [2024-06-27 20:50:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:50:44,957 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:44,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash 173009983, now seen corresponding path program 4 times [2024-06-27 20:50:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976178741] [2024-06-27 20:50:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:44,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976178741] [2024-06-27 20:50:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976178741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:47,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:47,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742903798] [2024-06-27 20:50:47,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:47,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:47,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:47,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:47,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 574 transitions, 9350 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:47,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:47,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:47,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:50,294 INFO L124 PetriNetUnfolderBase]: 5136/8451 cut-off events. [2024-06-27 20:50:50,294 INFO L125 PetriNetUnfolderBase]: For 778423/778436 co-relation queries the response was YES. [2024-06-27 20:50:50,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64037 conditions, 8451 events. 5136/8451 cut-off events. For 778423/778436 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 57867 event pairs, 1032 based on Foata normal form. 16/8461 useless extension candidates. Maximal degree in co-relation 63874. Up to 6359 conditions per place. [2024-06-27 20:50:50,406 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 360 changer transitions 0/631 dead transitions. [2024-06-27 20:50:50,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 631 transitions, 11471 flow [2024-06-27 20:50:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:50:50,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:50:50,408 INFO L175 Difference]: Start difference. First operand has 334 places, 574 transitions, 9350 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:50:50,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 631 transitions, 11471 flow [2024-06-27 20:50:53,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 631 transitions, 10778 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:53,488 INFO L231 Difference]: Finished difference. Result has 337 places, 595 transitions, 9777 flow [2024-06-27 20:50:53,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8718, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9777, PETRI_PLACES=337, PETRI_TRANSITIONS=595} [2024-06-27 20:50:53,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 20:50:53,489 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 595 transitions, 9777 flow [2024-06-27 20:50:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:53,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:53,489 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] [2024-06-27 20:50:53,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:50:53,490 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:53,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 354087206, now seen corresponding path program 1 times [2024-06-27 20:50:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:53,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552272621] [2024-06-27 20:50:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:56,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552272621] [2024-06-27 20:50:56,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552272621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:56,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:56,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:56,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726555524] [2024-06-27 20:50:56,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:56,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:56,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:56,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 595 transitions, 9777 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) [2024-06-27 20:50:56,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:56,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:56,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:59,455 INFO L124 PetriNetUnfolderBase]: 5180/8475 cut-off events. [2024-06-27 20:50:59,455 INFO L125 PetriNetUnfolderBase]: For 824811/824818 co-relation queries the response was YES. [2024-06-27 20:50:59,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64576 conditions, 8475 events. 5180/8475 cut-off events. For 824811/824818 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 57765 event pairs, 1034 based on Foata normal form. 16/8487 useless extension candidates. Maximal degree in co-relation 64412. Up to 7455 conditions per place. [2024-06-27 20:50:59,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 528 selfloop transitions, 99 changer transitions 0/632 dead transitions. [2024-06-27 20:50:59,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 632 transitions, 11208 flow [2024-06-27 20:50:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:50:59,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:50:59,571 INFO L175 Difference]: Start difference. First operand has 337 places, 595 transitions, 9777 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:50:59,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 632 transitions, 11208 flow [2024-06-27 20:51:02,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 632 transitions, 10647 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:02,287 INFO L231 Difference]: Finished difference. Result has 341 places, 597 transitions, 9483 flow [2024-06-27 20:51:02,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9216, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9483, PETRI_PLACES=341, PETRI_TRANSITIONS=597} [2024-06-27 20:51:02,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 20:51:02,288 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 597 transitions, 9483 flow [2024-06-27 20:51:02,288 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) [2024-06-27 20:51:02,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:02,288 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] [2024-06-27 20:51:02,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:51:02,289 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:02,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1507344131, now seen corresponding path program 5 times [2024-06-27 20:51:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:02,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493225893] [2024-06-27 20:51:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:05,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:05,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493225893] [2024-06-27 20:51:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493225893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:05,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:05,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:05,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186759859] [2024-06-27 20:51:05,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:05,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:05,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:05,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:05,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 597 transitions, 9483 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:05,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:05,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:05,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:08,037 INFO L124 PetriNetUnfolderBase]: 5214/8558 cut-off events. [2024-06-27 20:51:08,037 INFO L125 PetriNetUnfolderBase]: For 779861/779866 co-relation queries the response was YES. [2024-06-27 20:51:08,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63850 conditions, 8558 events. 5214/8558 cut-off events. For 779861/779866 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 58446 event pairs, 1287 based on Foata normal form. 4/8556 useless extension candidates. Maximal degree in co-relation 63685. Up to 6816 conditions per place. [2024-06-27 20:51:08,169 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 354 selfloop transitions, 277 changer transitions 0/636 dead transitions. [2024-06-27 20:51:08,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 636 transitions, 11407 flow [2024-06-27 20:51:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:51:08,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:51:08,170 INFO L175 Difference]: Start difference. First operand has 341 places, 597 transitions, 9483 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:51:08,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 636 transitions, 11407 flow [2024-06-27 20:51:11,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 636 transitions, 11179 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:11,623 INFO L231 Difference]: Finished difference. Result has 344 places, 611 transitions, 10267 flow [2024-06-27 20:51:11,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9261, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10267, PETRI_PLACES=344, PETRI_TRANSITIONS=611} [2024-06-27 20:51:11,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 20:51:11,624 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 611 transitions, 10267 flow [2024-06-27 20:51:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:11,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:11,624 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] [2024-06-27 20:51:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:51:11,625 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)] === [2024-06-27 20:51:11,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1473272889, now seen corresponding path program 6 times [2024-06-27 20:51:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:11,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975614621] [2024-06-27 20:51:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975614621] [2024-06-27 20:51:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975614621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:14,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:14,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:14,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894809470] [2024-06-27 20:51:14,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:14,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:14,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 611 transitions, 10267 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) [2024-06-27 20:51:14,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:14,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:14,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:17,814 INFO L124 PetriNetUnfolderBase]: 5244/8575 cut-off events. [2024-06-27 20:51:17,814 INFO L125 PetriNetUnfolderBase]: For 808632/808637 co-relation queries the response was YES. [2024-06-27 20:51:17,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65577 conditions, 8575 events. 5244/8575 cut-off events. For 808632/808637 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 58405 event pairs, 1061 based on Foata normal form. 6/8575 useless extension candidates. Maximal degree in co-relation 65409. Up to 6489 conditions per place. [2024-06-27 20:51:17,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 273 selfloop transitions, 375 changer transitions 0/653 dead transitions. [2024-06-27 20:51:17,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 653 transitions, 12013 flow [2024-06-27 20:51:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 20:51:17,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-27 20:51:17,939 INFO L175 Difference]: Start difference. First operand has 344 places, 611 transitions, 10267 flow. Second operand 11 states and 193 transitions. [2024-06-27 20:51:17,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 653 transitions, 12013 flow [2024-06-27 20:51:21,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 653 transitions, 11698 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:51:21,602 INFO L231 Difference]: Finished difference. Result has 351 places, 620 transitions, 10884 flow [2024-06-27 20:51:21,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9958, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10884, PETRI_PLACES=351, PETRI_TRANSITIONS=620} [2024-06-27 20:51:21,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-27 20:51:21,603 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 620 transitions, 10884 flow [2024-06-27 20:51:21,603 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) [2024-06-27 20:51:21,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:21,604 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] [2024-06-27 20:51:21,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:51:21,604 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)] === [2024-06-27 20:51:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1473273106, now seen corresponding path program 2 times [2024-06-27 20:51:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377379124] [2024-06-27 20:51:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:24,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:24,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377379124] [2024-06-27 20:51:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377379124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:24,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:24,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:24,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172841154] [2024-06-27 20:51:24,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:24,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:24,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:24,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:24,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 620 transitions, 10884 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) [2024-06-27 20:51:24,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:24,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:24,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:27,599 INFO L124 PetriNetUnfolderBase]: 5264/8615 cut-off events. [2024-06-27 20:51:27,599 INFO L125 PetriNetUnfolderBase]: For 821443/821448 co-relation queries the response was YES. [2024-06-27 20:51:27,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66638 conditions, 8615 events. 5264/8615 cut-off events. For 821443/821448 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 58792 event pairs, 1067 based on Foata normal form. 4/8613 useless extension candidates. Maximal degree in co-relation 66469. Up to 6225 conditions per place. [2024-06-27 20:51:27,727 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 302 selfloop transitions, 352 changer transitions 0/659 dead transitions. [2024-06-27 20:51:27,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 659 transitions, 12796 flow [2024-06-27 20:51:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 20:51:27,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 20:51:27,729 INFO L175 Difference]: Start difference. First operand has 351 places, 620 transitions, 10884 flow. Second operand 11 states and 196 transitions. [2024-06-27 20:51:27,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 659 transitions, 12796 flow [2024-06-27 20:51:31,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 659 transitions, 12258 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:31,106 INFO L231 Difference]: Finished difference. Result has 354 places, 624 transitions, 11130 flow [2024-06-27 20:51:31,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10346, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11130, PETRI_PLACES=354, PETRI_TRANSITIONS=624} [2024-06-27 20:51:31,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 20:51:31,107 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 624 transitions, 11130 flow [2024-06-27 20:51:31,107 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) [2024-06-27 20:51:31,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:31,107 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] [2024-06-27 20:51:31,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:51:31,107 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)] === [2024-06-27 20:51:31,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1391084986, now seen corresponding path program 2 times [2024-06-27 20:51:31,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:31,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23552504] [2024-06-27 20:51:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23552504] [2024-06-27 20:51:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23552504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:34,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:34,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359414829] [2024-06-27 20:51:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:34,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:34,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:34,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 624 transitions, 11130 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) [2024-06-27 20:51:34,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:34,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:34,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:37,473 INFO L124 PetriNetUnfolderBase]: 5308/8727 cut-off events. [2024-06-27 20:51:37,473 INFO L125 PetriNetUnfolderBase]: For 880965/880980 co-relation queries the response was YES. [2024-06-27 20:51:37,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67437 conditions, 8727 events. 5308/8727 cut-off events. For 880965/880980 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 60127 event pairs, 1069 based on Foata normal form. 24/8747 useless extension candidates. Maximal degree in co-relation 67267. Up to 7651 conditions per place. [2024-06-27 20:51:37,629 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 88 changer transitions 0/653 dead transitions. [2024-06-27 20:51:37,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 653 transitions, 12583 flow [2024-06-27 20:51:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:51:37,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:51:37,631 INFO L175 Difference]: Start difference. First operand has 354 places, 624 transitions, 11130 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:51:37,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 653 transitions, 12583 flow [2024-06-27 20:51:41,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 653 transitions, 11868 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:41,154 INFO L231 Difference]: Finished difference. Result has 354 places, 626 transitions, 10662 flow [2024-06-27 20:51:41,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10415, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10662, PETRI_PLACES=354, PETRI_TRANSITIONS=626} [2024-06-27 20:51:41,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 20:51:41,155 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 626 transitions, 10662 flow [2024-06-27 20:51:41,155 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) [2024-06-27 20:51:41,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:41,155 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] [2024-06-27 20:51:41,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:51:41,155 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)] === [2024-06-27 20:51:41,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1290026008, now seen corresponding path program 3 times [2024-06-27 20:51:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78364368] [2024-06-27 20:51:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:41,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:44,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78364368] [2024-06-27 20:51:44,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78364368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:44,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:44,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:44,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274781335] [2024-06-27 20:51:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:44,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:44,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:44,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 626 transitions, 10662 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) [2024-06-27 20:51:44,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:44,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:44,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:47,423 INFO L124 PetriNetUnfolderBase]: 5293/8704 cut-off events. [2024-06-27 20:51:47,423 INFO L125 PetriNetUnfolderBase]: For 839245/839260 co-relation queries the response was YES. [2024-06-27 20:51:47,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65484 conditions, 8704 events. 5293/8704 cut-off events. For 839245/839260 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 59957 event pairs, 1028 based on Foata normal form. 24/8724 useless extension candidates. Maximal degree in co-relation 65313. Up to 7156 conditions per place. [2024-06-27 20:51:47,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 569 selfloop transitions, 86 changer transitions 0/660 dead transitions. [2024-06-27 20:51:47,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 660 transitions, 12375 flow [2024-06-27 20:51:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:51:47,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:51:47,587 INFO L175 Difference]: Start difference. First operand has 354 places, 626 transitions, 10662 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:51:47,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 660 transitions, 12375 flow [2024-06-27 20:51:51,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 660 transitions, 12169 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:51,309 INFO L231 Difference]: Finished difference. Result has 356 places, 628 transitions, 10699 flow [2024-06-27 20:51:51,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10456, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10699, PETRI_PLACES=356, PETRI_TRANSITIONS=628} [2024-06-27 20:51:51,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:51:51,309 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 628 transitions, 10699 flow [2024-06-27 20:51:51,309 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) [2024-06-27 20:51:51,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:51,310 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] [2024-06-27 20:51:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:51:51,310 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:51,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash -710404846, now seen corresponding path program 3 times [2024-06-27 20:51:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:51,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779789320] [2024-06-27 20:51:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:54,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:54,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779789320] [2024-06-27 20:51:54,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779789320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:54,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:54,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:54,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842377855] [2024-06-27 20:51:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:54,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:54,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:54,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:54,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 628 transitions, 10699 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) [2024-06-27 20:51:54,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:54,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:57,232 INFO L124 PetriNetUnfolderBase]: 5281/8689 cut-off events. [2024-06-27 20:51:57,233 INFO L125 PetriNetUnfolderBase]: For 792314/792319 co-relation queries the response was YES. [2024-06-27 20:51:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65086 conditions, 8689 events. 5281/8689 cut-off events. For 792314/792319 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 59758 event pairs, 1184 based on Foata normal form. 4/8687 useless extension candidates. Maximal degree in co-relation 64914. Up to 6264 conditions per place. [2024-06-27 20:51:57,366 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 327 selfloop transitions, 322 changer transitions 0/654 dead transitions. [2024-06-27 20:51:57,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 654 transitions, 12313 flow [2024-06-27 20:51:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:51:57,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:51:57,368 INFO L175 Difference]: Start difference. First operand has 356 places, 628 transitions, 10699 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:51:57,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 654 transitions, 12313 flow [2024-06-27 20:52:01,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 654 transitions, 12113 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:52:01,200 INFO L231 Difference]: Finished difference. Result has 360 places, 628 transitions, 11152 flow [2024-06-27 20:52:01,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10499, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11152, PETRI_PLACES=360, PETRI_TRANSITIONS=628} [2024-06-27 20:52:01,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 20:52:01,201 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 628 transitions, 11152 flow [2024-06-27 20:52:01,201 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) [2024-06-27 20:52:01,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:01,201 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] [2024-06-27 20:52:01,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:52:01,202 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:01,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:01,202 INFO L85 PathProgramCache]: Analyzing trace with hash -710405063, now seen corresponding path program 7 times [2024-06-27 20:52:01,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:01,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712444361] [2024-06-27 20:52:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:01,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:04,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:04,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712444361] [2024-06-27 20:52:04,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712444361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:04,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:04,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:04,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870718541] [2024-06-27 20:52:04,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:04,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:04,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:04,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:04,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:04,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 628 transitions, 11152 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) [2024-06-27 20:52:04,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:04,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:04,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:07,265 INFO L124 PetriNetUnfolderBase]: 5263/8651 cut-off events. [2024-06-27 20:52:07,265 INFO L125 PetriNetUnfolderBase]: For 787488/787493 co-relation queries the response was YES. [2024-06-27 20:52:07,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65080 conditions, 8651 events. 5263/8651 cut-off events. For 787488/787493 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 59367 event pairs, 1163 based on Foata normal form. 6/8651 useless extension candidates. Maximal degree in co-relation 64907. Up to 6533 conditions per place. [2024-06-27 20:52:07,383 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 348 changer transitions 0/653 dead transitions. [2024-06-27 20:52:07,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 653 transitions, 12716 flow [2024-06-27 20:52:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:52:07,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:52:07,385 INFO L175 Difference]: Start difference. First operand has 360 places, 628 transitions, 11152 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:52:07,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 653 transitions, 12716 flow [2024-06-27 20:52:11,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 653 transitions, 11959 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 20:52:11,163 INFO L231 Difference]: Finished difference. Result has 359 places, 628 transitions, 11105 flow [2024-06-27 20:52:11,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10395, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11105, PETRI_PLACES=359, PETRI_TRANSITIONS=628} [2024-06-27 20:52:11,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 20:52:11,163 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 628 transitions, 11105 flow [2024-06-27 20:52:11,164 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) [2024-06-27 20:52:11,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:11,164 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] [2024-06-27 20:52:11,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:52:11,164 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:11,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -226893789, now seen corresponding path program 8 times [2024-06-27 20:52:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102248749] [2024-06-27 20:52:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:11,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:14,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102248749] [2024-06-27 20:52:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102248749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:14,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201842921] [2024-06-27 20:52:14,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:14,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 628 transitions, 11105 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) [2024-06-27 20:52:14,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:14,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:17,820 INFO L124 PetriNetUnfolderBase]: 5367/8804 cut-off events. [2024-06-27 20:52:17,821 INFO L125 PetriNetUnfolderBase]: For 858556/858564 co-relation queries the response was YES. [2024-06-27 20:52:17,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67010 conditions, 8804 events. 5367/8804 cut-off events. For 858556/858564 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 60473 event pairs, 1110 based on Foata normal form. 14/8801 useless extension candidates. Maximal degree in co-relation 66837. Up to 7446 conditions per place. [2024-06-27 20:52:17,946 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 180 changer transitions 0/695 dead transitions. [2024-06-27 20:52:17,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 695 transitions, 13337 flow [2024-06-27 20:52:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-27 20:52:17,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:52:17,948 INFO L175 Difference]: Start difference. First operand has 359 places, 628 transitions, 11105 flow. Second operand 12 states and 207 transitions. [2024-06-27 20:52:17,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 695 transitions, 13337 flow [2024-06-27 20:52:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 695 transitions, 12351 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:52:20,983 INFO L231 Difference]: Finished difference. Result has 363 places, 652 transitions, 11077 flow [2024-06-27 20:52:20,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10191, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11077, PETRI_PLACES=363, PETRI_TRANSITIONS=652} [2024-06-27 20:52:20,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 20:52:20,984 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 652 transitions, 11077 flow [2024-06-27 20:52:20,984 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) [2024-06-27 20:52:20,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:20,984 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] [2024-06-27 20:52:20,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:52:20,984 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:20,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1123999655, now seen corresponding path program 9 times [2024-06-27 20:52:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:20,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147418625] [2024-06-27 20:52:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:24,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:24,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147418625] [2024-06-27 20:52:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147418625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:24,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97980419] [2024-06-27 20:52:24,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:24,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:24,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 652 transitions, 11077 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) [2024-06-27 20:52:24,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:24,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:24,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:27,155 INFO L124 PetriNetUnfolderBase]: 5343/8772 cut-off events. [2024-06-27 20:52:27,156 INFO L125 PetriNetUnfolderBase]: For 818149/818157 co-relation queries the response was YES. [2024-06-27 20:52:27,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65410 conditions, 8772 events. 5343/8772 cut-off events. For 818149/818157 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 60329 event pairs, 1110 based on Foata normal form. 14/8769 useless extension candidates. Maximal degree in co-relation 65235. Up to 7426 conditions per place. [2024-06-27 20:52:27,306 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 180 changer transitions 0/692 dead transitions. [2024-06-27 20:52:27,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 692 transitions, 12573 flow [2024-06-27 20:52:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 20:52:27,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-27 20:52:27,308 INFO L175 Difference]: Start difference. First operand has 363 places, 652 transitions, 11077 flow. Second operand 11 states and 193 transitions. [2024-06-27 20:52:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 692 transitions, 12573 flow [2024-06-27 20:52:31,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 692 transitions, 12189 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 20:52:31,765 INFO L231 Difference]: Finished difference. Result has 365 places, 652 transitions, 11069 flow [2024-06-27 20:52:31,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10693, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11069, PETRI_PLACES=365, PETRI_TRANSITIONS=652} [2024-06-27 20:52:31,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 20:52:31,766 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 652 transitions, 11069 flow [2024-06-27 20:52:31,766 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) [2024-06-27 20:52:31,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:31,766 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] [2024-06-27 20:52:31,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:52:31,766 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:31,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1646061930, now seen corresponding path program 4 times [2024-06-27 20:52:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:31,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611736088] [2024-06-27 20:52:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:35,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611736088] [2024-06-27 20:52:35,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611736088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:35,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:35,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340033317] [2024-06-27 20:52:35,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:35,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:35,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 652 transitions, 11069 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) [2024-06-27 20:52:35,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:35,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:35,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:37,988 INFO L124 PetriNetUnfolderBase]: 5353/8756 cut-off events. [2024-06-27 20:52:37,988 INFO L125 PetriNetUnfolderBase]: For 801416/801424 co-relation queries the response was YES. [2024-06-27 20:52:38,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65647 conditions, 8756 events. 5353/8756 cut-off events. For 801416/801424 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 59952 event pairs, 1162 based on Foata normal form. 8/8734 useless extension candidates. Maximal degree in co-relation 65471. Up to 7488 conditions per place. [2024-06-27 20:52:38,113 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 520 selfloop transitions, 159 changer transitions 0/684 dead transitions. [2024-06-27 20:52:38,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 684 transitions, 12589 flow [2024-06-27 20:52:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:52:38,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:52:38,115 INFO L175 Difference]: Start difference. First operand has 365 places, 652 transitions, 11069 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:52:38,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 684 transitions, 12589 flow [2024-06-27 20:52:42,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 684 transitions, 12229 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 20:52:42,084 INFO L231 Difference]: Finished difference. Result has 364 places, 655 transitions, 11116 flow [2024-06-27 20:52:42,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10709, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11116, PETRI_PLACES=364, PETRI_TRANSITIONS=655} [2024-06-27 20:52:42,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 20:52:42,085 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 655 transitions, 11116 flow [2024-06-27 20:52:42,085 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) [2024-06-27 20:52:42,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:42,085 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, 1] [2024-06-27 20:52:42,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:52:42,086 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:42,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1422961841, now seen corresponding path program 10 times [2024-06-27 20:52:42,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637204752] [2024-06-27 20:52:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:42,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:45,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:45,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637204752] [2024-06-27 20:52:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637204752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:45,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:45,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:45,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121355379] [2024-06-27 20:52:45,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:45,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:45,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:45,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:45,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 655 transitions, 11116 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) [2024-06-27 20:52:45,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:45,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:45,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:48,808 INFO L124 PetriNetUnfolderBase]: 5329/8733 cut-off events. [2024-06-27 20:52:48,808 INFO L125 PetriNetUnfolderBase]: For 803269/803273 co-relation queries the response was YES. [2024-06-27 20:52:48,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64712 conditions, 8733 events. 5329/8733 cut-off events. For 803269/803273 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 59888 event pairs, 1148 based on Foata normal form. 10/8717 useless extension candidates. Maximal degree in co-relation 64535. Up to 7340 conditions per place. [2024-06-27 20:52:48,949 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 492 selfloop transitions, 196 changer transitions 0/693 dead transitions. [2024-06-27 20:52:48,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 693 transitions, 12814 flow [2024-06-27 20:52:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-27 20:52:48,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 20:52:48,976 INFO L175 Difference]: Start difference. First operand has 364 places, 655 transitions, 11116 flow. Second operand 12 states and 206 transitions. [2024-06-27 20:52:48,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 693 transitions, 12814 flow [2024-06-27 20:52:52,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 693 transitions, 12423 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:52,844 INFO L231 Difference]: Finished difference. Result has 369 places, 655 transitions, 11135 flow [2024-06-27 20:52:52,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10725, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11135, PETRI_PLACES=369, PETRI_TRANSITIONS=655} [2024-06-27 20:52:52,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 20:52:52,845 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 655 transitions, 11135 flow [2024-06-27 20:52:52,845 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) [2024-06-27 20:52:52,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:52,845 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] [2024-06-27 20:52:52,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:52:52,846 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:52,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:52,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1377301230, now seen corresponding path program 5 times [2024-06-27 20:52:52,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851475566] [2024-06-27 20:52:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:52,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851475566] [2024-06-27 20:52:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851475566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:56,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:56,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:56,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954997405] [2024-06-27 20:52:56,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:56,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:56,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:56,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 655 transitions, 11135 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) [2024-06-27 20:52:56,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:56,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:56,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:59,148 INFO L124 PetriNetUnfolderBase]: 5339/8726 cut-off events. [2024-06-27 20:52:59,148 INFO L125 PetriNetUnfolderBase]: For 784029/784037 co-relation queries the response was YES. [2024-06-27 20:52:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65018 conditions, 8726 events. 5339/8726 cut-off events. For 784029/784037 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59716 event pairs, 1142 based on Foata normal form. 8/8704 useless extension candidates. Maximal degree in co-relation 64840. Up to 7420 conditions per place. [2024-06-27 20:52:59,279 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 178 changer transitions 0/688 dead transitions. [2024-06-27 20:52:59,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 688 transitions, 12677 flow [2024-06-27 20:52:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:52:59,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:52:59,281 INFO L175 Difference]: Start difference. First operand has 369 places, 655 transitions, 11135 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:52:59,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 688 transitions, 12677 flow [2024-06-27 20:53:02,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 688 transitions, 11789 flow, removed 40 selfloop flow, removed 13 redundant places. [2024-06-27 20:53:02,593 INFO L231 Difference]: Finished difference. Result has 365 places, 658 transitions, 10701 flow [2024-06-27 20:53:02,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10247, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10701, PETRI_PLACES=365, PETRI_TRANSITIONS=658} [2024-06-27 20:53:02,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 20:53:02,593 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 658 transitions, 10701 flow [2024-06-27 20:53:02,593 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) [2024-06-27 20:53:02,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:02,594 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] [2024-06-27 20:53:02,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:53:02,594 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:02,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:02,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1262277187, now seen corresponding path program 11 times [2024-06-27 20:53:02,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868947516] [2024-06-27 20:53:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:05,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:05,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868947516] [2024-06-27 20:53:05,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868947516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:05,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:05,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:05,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942700801] [2024-06-27 20:53:05,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:05,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:05,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:05,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:05,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 658 transitions, 10701 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) [2024-06-27 20:53:05,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:05,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:09,174 INFO L124 PetriNetUnfolderBase]: 5397/8868 cut-off events. [2024-06-27 20:53:09,175 INFO L125 PetriNetUnfolderBase]: For 823401/823409 co-relation queries the response was YES. [2024-06-27 20:53:09,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66255 conditions, 8868 events. 5397/8868 cut-off events. For 823401/823409 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 61204 event pairs, 999 based on Foata normal form. 8/8859 useless extension candidates. Maximal degree in co-relation 66077. Up to 6970 conditions per place. [2024-06-27 20:53:09,312 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 332 changer transitions 0/712 dead transitions. [2024-06-27 20:53:09,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 712 transitions, 13077 flow [2024-06-27 20:53:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:53:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:53:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 20:53:09,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 20:53:09,314 INFO L175 Difference]: Start difference. First operand has 365 places, 658 transitions, 10701 flow. Second operand 11 states and 192 transitions. [2024-06-27 20:53:09,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 712 transitions, 13077 flow [2024-06-27 20:53:13,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 712 transitions, 12529 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:53:13,441 INFO L231 Difference]: Finished difference. Result has 369 places, 670 transitions, 11013 flow [2024-06-27 20:53:13,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10153, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11013, PETRI_PLACES=369, PETRI_TRANSITIONS=670} [2024-06-27 20:53:13,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 20:53:13,442 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 670 transitions, 11013 flow [2024-06-27 20:53:13,442 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) [2024-06-27 20:53:13,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:13,456 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] [2024-06-27 20:53:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:53:13,456 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:13,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1673165831, now seen corresponding path program 12 times [2024-06-27 20:53:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381134625] [2024-06-27 20:53:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381134625] [2024-06-27 20:53:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381134625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:16,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:16,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865812943] [2024-06-27 20:53:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:16,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:16,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:16,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:16,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 670 transitions, 11013 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) [2024-06-27 20:53:16,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:16,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:16,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:20,186 INFO L124 PetriNetUnfolderBase]: 5373/8803 cut-off events. [2024-06-27 20:53:20,186 INFO L125 PetriNetUnfolderBase]: For 829496/829500 co-relation queries the response was YES. [2024-06-27 20:53:20,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65115 conditions, 8803 events. 5373/8803 cut-off events. For 829496/829500 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 60515 event pairs, 1153 based on Foata normal form. 10/8786 useless extension candidates. Maximal degree in co-relation 64938. Up to 7400 conditions per place. [2024-06-27 20:53:20,546 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 202 changer transitions 0/712 dead transitions. [2024-06-27 20:53:20,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 712 transitions, 12763 flow [2024-06-27 20:53:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:53:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:53:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 232 transitions. [2024-06-27 20:53:20,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:53:20,548 INFO L175 Difference]: Start difference. First operand has 369 places, 670 transitions, 11013 flow. Second operand 14 states and 232 transitions. [2024-06-27 20:53:20,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 712 transitions, 12763 flow [2024-06-27 20:53:24,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 712 transitions, 11949 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 20:53:24,547 INFO L231 Difference]: Finished difference. Result has 373 places, 670 transitions, 10619 flow [2024-06-27 20:53:24,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10199, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10619, PETRI_PLACES=373, PETRI_TRANSITIONS=670} [2024-06-27 20:53:24,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 20:53:24,548 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 670 transitions, 10619 flow [2024-06-27 20:53:24,548 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) [2024-06-27 20:53:24,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:24,548 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] [2024-06-27 20:53:24,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:53:24,549 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:24,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1018396998, now seen corresponding path program 6 times [2024-06-27 20:53:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:24,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076828745] [2024-06-27 20:53:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076828745] [2024-06-27 20:53:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076828745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:27,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:27,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:27,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725380381] [2024-06-27 20:53:27,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:27,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:27,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:27,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:27,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:27,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 670 transitions, 10619 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) [2024-06-27 20:53:27,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:27,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:27,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:30,917 INFO L124 PetriNetUnfolderBase]: 5383/8807 cut-off events. [2024-06-27 20:53:30,917 INFO L125 PetriNetUnfolderBase]: For 804210/804214 co-relation queries the response was YES. [2024-06-27 20:53:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64588 conditions, 8807 events. 5383/8807 cut-off events. For 804210/804214 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 60437 event pairs, 1171 based on Foata normal form. 4/8783 useless extension candidates. Maximal degree in co-relation 64412. Up to 7453 conditions per place. [2024-06-27 20:53:31,039 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 527 selfloop transitions, 177 changer transitions 0/709 dead transitions. [2024-06-27 20:53:31,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 709 transitions, 12509 flow [2024-06-27 20:53:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:53:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:53:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 20:53:31,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 20:53:31,040 INFO L175 Difference]: Start difference. First operand has 373 places, 670 transitions, 10619 flow. Second operand 11 states and 188 transitions. [2024-06-27 20:53:31,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 709 transitions, 12509 flow [2024-06-27 20:53:35,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 709 transitions, 12097 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:53:35,149 INFO L231 Difference]: Finished difference. Result has 372 places, 676 transitions, 10742 flow [2024-06-27 20:53:35,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10207, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10742, PETRI_PLACES=372, PETRI_TRANSITIONS=676} [2024-06-27 20:53:35,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 20:53:35,150 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 676 transitions, 10742 flow [2024-06-27 20:53:35,150 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) [2024-06-27 20:53:35,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:35,150 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] [2024-06-27 20:53:35,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:53:35,150 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:35,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1262010060, now seen corresponding path program 7 times [2024-06-27 20:53:35,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:35,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565102069] [2024-06-27 20:53:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:38,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565102069] [2024-06-27 20:53:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565102069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:38,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:38,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:38,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608004822] [2024-06-27 20:53:38,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:38,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:38,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:38,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:38,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:38,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 676 transitions, 10742 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) [2024-06-27 20:53:38,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:38,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:38,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:41,388 INFO L124 PetriNetUnfolderBase]: 5425/8807 cut-off events. [2024-06-27 20:53:41,388 INFO L125 PetriNetUnfolderBase]: For 848034/848042 co-relation queries the response was YES. [2024-06-27 20:53:41,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65651 conditions, 8807 events. 5425/8807 cut-off events. For 848034/848042 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 59789 event pairs, 1128 based on Foata normal form. 8/8787 useless extension candidates. Maximal degree in co-relation 65474. Up to 6071 conditions per place. [2024-06-27 20:53:41,526 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 276 selfloop transitions, 440 changer transitions 0/721 dead transitions. [2024-06-27 20:53:41,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 721 transitions, 13276 flow [2024-06-27 20:53:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:53:41,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:53:41,528 INFO L175 Difference]: Start difference. First operand has 372 places, 676 transitions, 10742 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:53:41,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 721 transitions, 13276 flow [2024-06-27 20:53:46,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 721 transitions, 12969 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 20:53:46,057 INFO L231 Difference]: Finished difference. Result has 374 places, 689 transitions, 11673 flow [2024-06-27 20:53:46,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10441, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11673, PETRI_PLACES=374, PETRI_TRANSITIONS=689} [2024-06-27 20:53:46,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 20:53:46,058 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 689 transitions, 11673 flow [2024-06-27 20:53:46,058 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) [2024-06-27 20:53:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:46,060 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] [2024-06-27 20:53:46,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:53:46,060 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:46,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1262276970, now seen corresponding path program 8 times [2024-06-27 20:53:46,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:46,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004880883] [2024-06-27 20:53:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:46,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:49,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:49,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004880883] [2024-06-27 20:53:49,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004880883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:49,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:49,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:49,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357925689] [2024-06-27 20:53:49,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:49,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:49,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:49,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 689 transitions, 11673 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) [2024-06-27 20:53:49,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:49,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:49,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:52,223 INFO L124 PetriNetUnfolderBase]: 5419/8788 cut-off events. [2024-06-27 20:53:52,224 INFO L125 PetriNetUnfolderBase]: For 855041/855049 co-relation queries the response was YES. [2024-06-27 20:53:52,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67634 conditions, 8788 events. 5419/8788 cut-off events. For 855041/855049 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 59665 event pairs, 1130 based on Foata normal form. 8/8765 useless extension candidates. Maximal degree in co-relation 67455. Up to 6068 conditions per place. [2024-06-27 20:53:52,362 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 433 changer transitions 0/720 dead transitions. [2024-06-27 20:53:52,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 720 transitions, 13639 flow [2024-06-27 20:53:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:53:52,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:53:52,364 INFO L175 Difference]: Start difference. First operand has 374 places, 689 transitions, 11673 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:53:52,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 720 transitions, 13639 flow [2024-06-27 20:53:56,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 720 transitions, 13243 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 20:53:56,419 INFO L231 Difference]: Finished difference. Result has 379 places, 689 transitions, 12149 flow [2024-06-27 20:53:56,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11277, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12149, PETRI_PLACES=379, PETRI_TRANSITIONS=689} [2024-06-27 20:53:56,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 20:53:56,419 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 689 transitions, 12149 flow [2024-06-27 20:53:56,419 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) [2024-06-27 20:53:56,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:56,420 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] [2024-06-27 20:53:56,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:53:56,420 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:56,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:56,420 INFO L85 PathProgramCache]: Analyzing trace with hash -116414414, now seen corresponding path program 4 times [2024-06-27 20:53:56,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:56,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489871206] [2024-06-27 20:53:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:56,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:59,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:59,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489871206] [2024-06-27 20:53:59,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489871206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:59,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:59,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:59,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256986949] [2024-06-27 20:53:59,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:59,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:59,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:59,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:59,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:59,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:59,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 689 transitions, 12149 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) [2024-06-27 20:53:59,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:59,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:59,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:02,360 INFO L124 PetriNetUnfolderBase]: 5407/8891 cut-off events. [2024-06-27 20:54:02,360 INFO L125 PetriNetUnfolderBase]: For 848523/848529 co-relation queries the response was YES. [2024-06-27 20:54:02,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68023 conditions, 8891 events. 5407/8891 cut-off events. For 848523/848529 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 61557 event pairs, 1154 based on Foata normal form. 6/8880 useless extension candidates. Maximal degree in co-relation 67842. Up to 8080 conditions per place. [2024-06-27 20:54:02,507 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 660 selfloop transitions, 48 changer transitions 0/713 dead transitions. [2024-06-27 20:54:02,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 713 transitions, 13637 flow [2024-06-27 20:54:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:54:02,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:54:02,508 INFO L175 Difference]: Start difference. First operand has 379 places, 689 transitions, 12149 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:54:02,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 713 transitions, 13637 flow [2024-06-27 20:54:07,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 713 transitions, 12825 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:07,405 INFO L231 Difference]: Finished difference. Result has 380 places, 689 transitions, 11439 flow [2024-06-27 20:54:07,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11337, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11439, PETRI_PLACES=380, PETRI_TRANSITIONS=689} [2024-06-27 20:54:07,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 20:54:07,406 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 689 transitions, 11439 flow [2024-06-27 20:54:07,406 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) [2024-06-27 20:54:07,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:07,406 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] [2024-06-27 20:54:07,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:54:07,406 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:07,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:07,407 INFO L85 PathProgramCache]: Analyzing trace with hash -526150618, now seen corresponding path program 9 times [2024-06-27 20:54:07,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:07,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210805254] [2024-06-27 20:54:07,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:07,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210805254] [2024-06-27 20:54:10,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210805254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:10,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:10,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627925603] [2024-06-27 20:54:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:10,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:10,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 689 transitions, 11439 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) [2024-06-27 20:54:10,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:10,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:10,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:13,442 INFO L124 PetriNetUnfolderBase]: 5401/8818 cut-off events. [2024-06-27 20:54:13,443 INFO L125 PetriNetUnfolderBase]: For 843540/843542 co-relation queries the response was YES. [2024-06-27 20:54:13,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66148 conditions, 8818 events. 5401/8818 cut-off events. For 843540/843542 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 60338 event pairs, 1178 based on Foata normal form. 2/8791 useless extension candidates. Maximal degree in co-relation 65966. Up to 7478 conditions per place. [2024-06-27 20:54:13,581 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 533 selfloop transitions, 176 changer transitions 0/714 dead transitions. [2024-06-27 20:54:13,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 714 transitions, 12927 flow [2024-06-27 20:54:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:54:13,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:54:13,583 INFO L175 Difference]: Start difference. First operand has 380 places, 689 transitions, 11439 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:54:13,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 714 transitions, 12927 flow [2024-06-27 20:54:17,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 714 transitions, 12682 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:17,915 INFO L231 Difference]: Finished difference. Result has 381 places, 689 transitions, 11553 flow [2024-06-27 20:54:17,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11194, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11553, PETRI_PLACES=381, PETRI_TRANSITIONS=689} [2024-06-27 20:54:17,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 20:54:17,916 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 689 transitions, 11553 flow [2024-06-27 20:54:17,916 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) [2024-06-27 20:54:17,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:17,916 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] [2024-06-27 20:54:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:54:17,916 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash -526150835, now seen corresponding path program 13 times [2024-06-27 20:54:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711564092] [2024-06-27 20:54:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:17,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:20,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:20,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711564092] [2024-06-27 20:54:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711564092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:20,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:20,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:20,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113787704] [2024-06-27 20:54:20,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:20,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:20,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:20,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:20,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 689 transitions, 11553 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) [2024-06-27 20:54:20,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:20,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:20,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:23,991 INFO L124 PetriNetUnfolderBase]: 5389/8813 cut-off events. [2024-06-27 20:54:23,991 INFO L125 PetriNetUnfolderBase]: For 844210/844212 co-relation queries the response was YES. [2024-06-27 20:54:24,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65814 conditions, 8813 events. 5389/8813 cut-off events. For 844210/844212 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 60394 event pairs, 1177 based on Foata normal form. 4/8788 useless extension candidates. Maximal degree in co-relation 65631. Up to 7482 conditions per place. [2024-06-27 20:54:24,106 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 532 selfloop transitions, 177 changer transitions 0/714 dead transitions. [2024-06-27 20:54:24,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 714 transitions, 13041 flow [2024-06-27 20:54:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:54:24,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:54:24,108 INFO L175 Difference]: Start difference. First operand has 381 places, 689 transitions, 11553 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:54:24,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 714 transitions, 13041 flow [2024-06-27 20:54:28,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 714 transitions, 12541 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:54:28,289 INFO L231 Difference]: Finished difference. Result has 381 places, 689 transitions, 11416 flow [2024-06-27 20:54:28,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11053, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11416, PETRI_PLACES=381, PETRI_TRANSITIONS=689} [2024-06-27 20:54:28,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 20:54:28,290 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 689 transitions, 11416 flow [2024-06-27 20:54:28,290 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) [2024-06-27 20:54:28,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:28,291 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] [2024-06-27 20:54:28,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:54:28,291 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:28,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -951819734, now seen corresponding path program 5 times [2024-06-27 20:54:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810043122] [2024-06-27 20:54:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:31,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:31,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810043122] [2024-06-27 20:54:31,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810043122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:31,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:31,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:31,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002857786] [2024-06-27 20:54:31,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:31,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:31,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 689 transitions, 11416 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) [2024-06-27 20:54:31,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:31,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:31,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:34,478 INFO L124 PetriNetUnfolderBase]: 5397/8869 cut-off events. [2024-06-27 20:54:34,479 INFO L125 PetriNetUnfolderBase]: For 842147/842155 co-relation queries the response was YES. [2024-06-27 20:54:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65530 conditions, 8869 events. 5397/8869 cut-off events. For 842147/842155 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 61248 event pairs, 992 based on Foata normal form. 8/8860 useless extension candidates. Maximal degree in co-relation 65347. Up to 7752 conditions per place. [2024-06-27 20:54:34,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 593 selfloop transitions, 116 changer transitions 0/714 dead transitions. [2024-06-27 20:54:34,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 714 transitions, 12953 flow [2024-06-27 20:54:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:54:34,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:54:34,610 INFO L175 Difference]: Start difference. First operand has 381 places, 689 transitions, 11416 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:54:34,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 714 transitions, 12953 flow [2024-06-27 20:54:38,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 714 transitions, 12599 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:38,333 INFO L231 Difference]: Finished difference. Result has 381 places, 691 transitions, 11358 flow [2024-06-27 20:54:38,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11062, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11358, PETRI_PLACES=381, PETRI_TRANSITIONS=691} [2024-06-27 20:54:38,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 20:54:38,334 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 691 transitions, 11358 flow [2024-06-27 20:54:38,334 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) [2024-06-27 20:54:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:38,334 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] [2024-06-27 20:54:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:54:38,334 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:38,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1506100186, now seen corresponding path program 10 times [2024-06-27 20:54:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:38,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440746641] [2024-06-27 20:54:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:41,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:41,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440746641] [2024-06-27 20:54:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440746641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:41,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:41,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:41,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667990247] [2024-06-27 20:54:41,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:41,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:41,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:41,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:41,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 691 transitions, 11358 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) [2024-06-27 20:54:41,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:41,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:41,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:44,589 INFO L124 PetriNetUnfolderBase]: 5423/8811 cut-off events. [2024-06-27 20:54:44,590 INFO L125 PetriNetUnfolderBase]: For 874965/874967 co-relation queries the response was YES. [2024-06-27 20:54:44,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66049 conditions, 8811 events. 5423/8811 cut-off events. For 874965/874967 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 59854 event pairs, 1142 based on Foata normal form. 2/8785 useless extension candidates. Maximal degree in co-relation 65865. Up to 6066 conditions per place. [2024-06-27 20:54:44,733 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 278 selfloop transitions, 441 changer transitions 0/724 dead transitions. [2024-06-27 20:54:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 724 transitions, 13742 flow [2024-06-27 20:54:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:54:44,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:54:44,735 INFO L175 Difference]: Start difference. First operand has 381 places, 691 transitions, 11358 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:54:44,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 724 transitions, 13742 flow [2024-06-27 20:54:49,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 724 transitions, 13469 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:49,478 INFO L231 Difference]: Finished difference. Result has 384 places, 697 transitions, 12143 flow [2024-06-27 20:54:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11085, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12143, PETRI_PLACES=384, PETRI_TRANSITIONS=697} [2024-06-27 20:54:49,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 20:54:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 697 transitions, 12143 flow [2024-06-27 20:54:49,479 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) [2024-06-27 20:54:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:49,479 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] [2024-06-27 20:54:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:54:49,479 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -937938554, now seen corresponding path program 6 times [2024-06-27 20:54:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:49,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906427925] [2024-06-27 20:54:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:52,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:52,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906427925] [2024-06-27 20:54:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906427925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:52,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:52,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:52,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955220533] [2024-06-27 20:54:52,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:52,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:52,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:52,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 697 transitions, 12143 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) [2024-06-27 20:54:52,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:52,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:55,400 INFO L124 PetriNetUnfolderBase]: 5431/8921 cut-off events. [2024-06-27 20:54:55,400 INFO L125 PetriNetUnfolderBase]: For 890041/890049 co-relation queries the response was YES. [2024-06-27 20:54:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67578 conditions, 8921 events. 5431/8921 cut-off events. For 890041/890049 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 61670 event pairs, 988 based on Foata normal form. 8/8912 useless extension candidates. Maximal degree in co-relation 67393. Up to 7706 conditions per place. [2024-06-27 20:54:55,538 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 598 selfloop transitions, 123 changer transitions 0/726 dead transitions. [2024-06-27 20:54:55,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 726 transitions, 13742 flow [2024-06-27 20:54:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:54:55,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:54:55,539 INFO L175 Difference]: Start difference. First operand has 384 places, 697 transitions, 12143 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:54:55,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 726 transitions, 13742 flow [2024-06-27 20:55:00,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 726 transitions, 13190 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:00,117 INFO L231 Difference]: Finished difference. Result has 388 places, 699 transitions, 11899 flow [2024-06-27 20:55:00,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11591, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11899, PETRI_PLACES=388, PETRI_TRANSITIONS=699} [2024-06-27 20:55:00,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 20:55:00,118 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 699 transitions, 11899 flow [2024-06-27 20:55:00,118 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) [2024-06-27 20:55:00,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:00,119 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] [2024-06-27 20:55:00,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:55:00,119 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:00,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash -944878648, now seen corresponding path program 11 times [2024-06-27 20:55:00,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:00,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981992562] [2024-06-27 20:55:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:00,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981992562] [2024-06-27 20:55:03,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981992562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:03,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:03,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:03,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160731317] [2024-06-27 20:55:03,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:03,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:03,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:03,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:03,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 699 transitions, 11899 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) [2024-06-27 20:55:03,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:03,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:03,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:06,541 INFO L124 PetriNetUnfolderBase]: 5441/8853 cut-off events. [2024-06-27 20:55:06,541 INFO L125 PetriNetUnfolderBase]: For 911147/911149 co-relation queries the response was YES. [2024-06-27 20:55:06,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66905 conditions, 8853 events. 5441/8853 cut-off events. For 911147/911149 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 60484 event pairs, 1150 based on Foata normal form. 2/8827 useless extension candidates. Maximal degree in co-relation 66718. Up to 6084 conditions per place. [2024-06-27 20:55:06,663 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 287 selfloop transitions, 437 changer transitions 0/729 dead transitions. [2024-06-27 20:55:06,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 729 transitions, 14212 flow [2024-06-27 20:55:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:55:06,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:55:06,665 INFO L175 Difference]: Start difference. First operand has 388 places, 699 transitions, 11899 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:55:06,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 729 transitions, 14212 flow [2024-06-27 20:55:10,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 729 transitions, 13927 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:10,989 INFO L231 Difference]: Finished difference. Result has 391 places, 702 transitions, 12571 flow [2024-06-27 20:55:10,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11614, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12571, PETRI_PLACES=391, PETRI_TRANSITIONS=702} [2024-06-27 20:55:10,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 20:55:10,989 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 702 transitions, 12571 flow [2024-06-27 20:55:10,990 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) [2024-06-27 20:55:10,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:10,990 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] [2024-06-27 20:55:10,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:55:10,990 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:10,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash 406976293, now seen corresponding path program 14 times [2024-06-27 20:55:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100125122] [2024-06-27 20:55:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:10,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:13,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100125122] [2024-06-27 20:55:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100125122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:13,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:13,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26263783] [2024-06-27 20:55:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:13,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:13,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:13,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 702 transitions, 12571 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) [2024-06-27 20:55:13,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:13,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:13,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:17,334 INFO L124 PetriNetUnfolderBase]: 5467/8950 cut-off events. [2024-06-27 20:55:17,334 INFO L125 PetriNetUnfolderBase]: For 944988/944990 co-relation queries the response was YES. [2024-06-27 20:55:17,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68651 conditions, 8950 events. 5467/8950 cut-off events. For 944988/944990 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 61650 event pairs, 1064 based on Foata normal form. 2/8928 useless extension candidates. Maximal degree in co-relation 68463. Up to 7069 conditions per place. [2024-06-27 20:55:17,460 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 327 changer transitions 0/737 dead transitions. [2024-06-27 20:55:17,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 737 transitions, 14689 flow [2024-06-27 20:55:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:55:17,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:55:17,462 INFO L175 Difference]: Start difference. First operand has 391 places, 702 transitions, 12571 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:55:17,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 737 transitions, 14689 flow [2024-06-27 20:55:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 737 transitions, 13647 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:21,337 INFO L231 Difference]: Finished difference. Result has 395 places, 708 transitions, 12283 flow [2024-06-27 20:55:21,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11541, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12283, PETRI_PLACES=395, PETRI_TRANSITIONS=708} [2024-06-27 20:55:21,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 20:55:21,338 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 708 transitions, 12283 flow [2024-06-27 20:55:21,338 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) [2024-06-27 20:55:21,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:21,338 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] [2024-06-27 20:55:21,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:55:21,338 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:21,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1513718746, now seen corresponding path program 12 times [2024-06-27 20:55:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:21,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589925727] [2024-06-27 20:55:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589925727] [2024-06-27 20:55:24,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589925727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:24,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:24,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:24,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067122841] [2024-06-27 20:55:24,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:24,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:24,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:24,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:24,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 708 transitions, 12283 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) [2024-06-27 20:55:24,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:24,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:24,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:27,673 INFO L124 PetriNetUnfolderBase]: 5461/8872 cut-off events. [2024-06-27 20:55:27,674 INFO L125 PetriNetUnfolderBase]: For 939328/939330 co-relation queries the response was YES. [2024-06-27 20:55:27,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67675 conditions, 8872 events. 5461/8872 cut-off events. For 939328/939330 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 60436 event pairs, 1171 based on Foata normal form. 2/8846 useless extension candidates. Maximal degree in co-relation 67487. Up to 6096 conditions per place. [2024-06-27 20:55:27,806 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 440 changer transitions 0/734 dead transitions. [2024-06-27 20:55:27,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 734 transitions, 14295 flow [2024-06-27 20:55:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:55:27,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:55:27,807 INFO L175 Difference]: Start difference. First operand has 395 places, 708 transitions, 12283 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:55:27,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 734 transitions, 14295 flow [2024-06-27 20:55:32,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 734 transitions, 13789 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:32,296 INFO L231 Difference]: Finished difference. Result has 398 places, 708 transitions, 12663 flow [2024-06-27 20:55:32,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11777, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12663, PETRI_PLACES=398, PETRI_TRANSITIONS=708} [2024-06-27 20:55:32,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-27 20:55:32,297 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 708 transitions, 12663 flow [2024-06-27 20:55:32,297 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) [2024-06-27 20:55:32,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:32,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:32,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:55:32,298 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:32,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 593866235, now seen corresponding path program 15 times [2024-06-27 20:55:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453621372] [2024-06-27 20:55:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:34,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:34,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453621372] [2024-06-27 20:55:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453621372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:34,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:34,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:55:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494892955] [2024-06-27 20:55:34,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:34,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:55:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:34,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:55:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:55:35,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:35,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 708 transitions, 12663 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:35,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:35,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:35,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:37,989 INFO L124 PetriNetUnfolderBase]: 5455/8990 cut-off events. [2024-06-27 20:55:37,989 INFO L125 PetriNetUnfolderBase]: For 940794/940835 co-relation queries the response was YES. [2024-06-27 20:55:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68106 conditions, 8990 events. 5455/8990 cut-off events. For 940794/940835 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 62334 event pairs, 1114 based on Foata normal form. 4/8970 useless extension candidates. Maximal degree in co-relation 67916. Up to 7056 conditions per place. [2024-06-27 20:55:38,139 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 299 changer transitions 0/727 dead transitions. [2024-06-27 20:55:38,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 727 transitions, 14647 flow [2024-06-27 20:55:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:55:38,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:55:38,141 INFO L175 Difference]: Start difference. First operand has 398 places, 708 transitions, 12663 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:55:38,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 727 transitions, 14647 flow [2024-06-27 20:55:43,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 727 transitions, 13573 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 20:55:43,336 INFO L231 Difference]: Finished difference. Result has 396 places, 708 transitions, 12193 flow [2024-06-27 20:55:43,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12193, PETRI_PLACES=396, PETRI_TRANSITIONS=708} [2024-06-27 20:55:43,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-27 20:55:43,337 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 708 transitions, 12193 flow [2024-06-27 20:55:43,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:43,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:43,337 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] [2024-06-27 20:55:43,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:55:43,337 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:43,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -401640679, now seen corresponding path program 16 times [2024-06-27 20:55:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:43,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174888121] [2024-06-27 20:55:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174888121] [2024-06-27 20:55:46,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174888121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:46,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:46,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353619040] [2024-06-27 20:55:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:46,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:46,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 708 transitions, 12193 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) [2024-06-27 20:55:46,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:46,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:46,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:49,414 INFO L124 PetriNetUnfolderBase]: 5449/8908 cut-off events. [2024-06-27 20:55:49,415 INFO L125 PetriNetUnfolderBase]: For 935106/935108 co-relation queries the response was YES. [2024-06-27 20:55:49,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67053 conditions, 8908 events. 5449/8908 cut-off events. For 935106/935108 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 61243 event pairs, 1096 based on Foata normal form. 2/8886 useless extension candidates. Maximal degree in co-relation 66862. Up to 7051 conditions per place. [2024-06-27 20:55:49,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 324 changer transitions 0/734 dead transitions. [2024-06-27 20:55:49,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 734 transitions, 13969 flow [2024-06-27 20:55:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:55:49,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:55:49,556 INFO L175 Difference]: Start difference. First operand has 396 places, 708 transitions, 12193 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:55:49,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 734 transitions, 13969 flow [2024-06-27 20:55:54,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 734 transitions, 13337 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:54,394 INFO L231 Difference]: Finished difference. Result has 399 places, 708 transitions, 12215 flow [2024-06-27 20:55:54,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11561, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12215, PETRI_PLACES=399, PETRI_TRANSITIONS=708} [2024-06-27 20:55:54,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 20:55:54,394 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 708 transitions, 12215 flow [2024-06-27 20:55:54,395 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) [2024-06-27 20:55:54,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:54,395 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] [2024-06-27 20:55:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:55:54,395 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:54,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1650307462, now seen corresponding path program 7 times [2024-06-27 20:55:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:54,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122758131] [2024-06-27 20:55:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:57,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122758131] [2024-06-27 20:55:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122758131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:57,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184250549] [2024-06-27 20:55:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:57,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 708 transitions, 12215 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) [2024-06-27 20:55:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:57,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:00,672 INFO L124 PetriNetUnfolderBase]: 5457/8982 cut-off events. [2024-06-27 20:56:00,672 INFO L125 PetriNetUnfolderBase]: For 944080/944121 co-relation queries the response was YES. [2024-06-27 20:56:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67546 conditions, 8982 events. 5457/8982 cut-off events. For 944080/944121 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 62302 event pairs, 999 based on Foata normal form. 21/8981 useless extension candidates. Maximal degree in co-relation 67354. Up to 7838 conditions per place. [2024-06-27 20:56:00,822 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 615 selfloop transitions, 107 changer transitions 0/727 dead transitions. [2024-06-27 20:56:00,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 727 transitions, 13762 flow [2024-06-27 20:56:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:56:00,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:56:00,824 INFO L175 Difference]: Start difference. First operand has 399 places, 708 transitions, 12215 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:56:00,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 727 transitions, 13762 flow [2024-06-27 20:56:05,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 727 transitions, 13095 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:56:05,766 INFO L231 Difference]: Finished difference. Result has 399 places, 710 transitions, 11830 flow [2024-06-27 20:56:05,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11548, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11830, PETRI_PLACES=399, PETRI_TRANSITIONS=710} [2024-06-27 20:56:05,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 20:56:05,767 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 710 transitions, 11830 flow [2024-06-27 20:56:05,767 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) [2024-06-27 20:56:05,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:05,767 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] [2024-06-27 20:56:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:56:05,768 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:05,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash -174787884, now seen corresponding path program 8 times [2024-06-27 20:56:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:05,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081062639] [2024-06-27 20:56:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081062639] [2024-06-27 20:56:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081062639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:09,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468088318] [2024-06-27 20:56:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:09,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:09,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 710 transitions, 11830 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) [2024-06-27 20:56:09,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:09,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:12,100 INFO L124 PetriNetUnfolderBase]: 5537/9107 cut-off events. [2024-06-27 20:56:12,101 INFO L125 PetriNetUnfolderBase]: For 1047146/1047187 co-relation queries the response was YES. [2024-06-27 20:56:12,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69294 conditions, 9107 events. 5537/9107 cut-off events. For 1047146/1047187 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 63155 event pairs, 1026 based on Foata normal form. 21/9106 useless extension candidates. Maximal degree in co-relation 69101. Up to 7806 conditions per place. [2024-06-27 20:56:12,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 617 selfloop transitions, 114 changer transitions 0/736 dead transitions. [2024-06-27 20:56:12,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 736 transitions, 13750 flow [2024-06-27 20:56:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:56:12,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:56:12,233 INFO L175 Difference]: Start difference. First operand has 399 places, 710 transitions, 11830 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:56:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 736 transitions, 13750 flow [2024-06-27 20:56:17,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 736 transitions, 13491 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:17,909 INFO L231 Difference]: Finished difference. Result has 402 places, 714 transitions, 11950 flow [2024-06-27 20:56:17,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11571, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11950, PETRI_PLACES=402, PETRI_TRANSITIONS=714} [2024-06-27 20:56:17,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 20:56:17,910 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 714 transitions, 11950 flow [2024-06-27 20:56:17,910 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) [2024-06-27 20:56:17,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:17,911 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] [2024-06-27 20:56:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:56:17,912 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:17,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash 620506386, now seen corresponding path program 13 times [2024-06-27 20:56:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:17,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054733572] [2024-06-27 20:56:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:17,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15